[R] Incompatibility with VGAM
I just discovered that when the VGAM package (not on CRAN) is loaded, glm() doesn't work. This is because VGAM defines a family function() which gets found by glm() in place of the family function from stats. Then VGAM:::family returns an object which doesn't have a $family component, (it has a component $vfamily). I thought namespaces should protect us from this happening? Kjetil -- Kjetil Halvorsen. Peace is the most effective weapon of mass construction. -- Mahdi Elmandjra -- No virus found in this outgoing message. Checked by AVG Anti-Virus. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] Errors in Variables
Dear Spencer, The reason that I didn't respond to the original posting (I'm the author of the sem package), that that without additional information (such as the error variance of x), a model with error in both x and y will be underidentified (unless there are multiple indicators of x, which didn't seem to be the case here). I figured that what Jacob had in mind was something like minimizing the least (orthogonal) distance of the points to the regression line (implying by the way that x and y are on the same scale or somehow standardized), which isn't doable with sem as far as I'm aware. Regards, John John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Spencer Graves Sent: Saturday, May 28, 2005 4:47 PM To: Eric-Olivier Le Bigot Cc: r-help@stat.math.ethz.ch; Jacob van Wyk Subject: Re: [R] Errors in Variables I'm sorry, I have not followed this thread, but I wonder if you have considered library(sem), structural equations modeling? Errors in variables problems are the canonical special case. Also, have you done a search of www.r-project.org - search - R site search for terms like errors in variables regression? This just led me to ODRpack, which is NOT a CRAN package but is apparently available after a Google search. If it were my problem, I'd first try to figure out sem; if that seemed too difficult, I might then look at ODRpack. Also, have you read the posting guide! http://www.R-project.org/posting-guide.html? This suggests, among other things, that you provide a toy example that a potential respondant could easily copy from your email, test a few modifications, and prase a reply in a minute or so. This also helps clarify your question so any respondants are more likely to suggest something that is actually useful to you. Moreover, many people have reported that they were able to answer their own question in the course of preparing a question for this list using the posting guide. hope this helps. spencer graves Eric-Olivier Le Bigot wrote: I'm interested in this 2D line fitting too! I've been looking, without success, in the list of R packages. It might be possible to implement quite easily some of the formalism that you can find in Numerical Recipes (Fortran 77, 2nd ed.), paragraph 15.3. As a matter of fact, I did this in R but only for a model of the form y ~ x (with a given covariance matrix between x and y). I can send you the R code (preliminary version: I wrote it yesterday), if you want. Another interesting reference might be Am. J. Phys. 60, p. 66 (1992). But, again, you would have to implement things by yourself. All the best, EOL -- Dr. Eric-Olivier LE BIGOT (EOL)CNRS Associate Researcher ~~~o~o o~o~~~ Kastler Brossel Laboratory (LKB) http://www.lkb.ens.fr Université P. M. Curie and Ecole Normale Supérieure, Case 74 4 place Jussieu 75252 Paris CEDEX 05 France ~~~o~o o~o~~~ office : 01 44 27 73 67 fax: 01 44 27 38 45 ECR room: 01 44 27 47 12 x-ray room: 01 44 27 63 00 home: 01 73 74 61 87 For int'l calls: 33 + number without leading 0 On Wed, 25 May 2005, Jacob van Wyk wrote: I hope somebody can help. A student of mine is doing a study on Measurement Error models (errors-in-variables, total least squares, etc.). I have an old reference to a multi archive that contains leiv3: Programs for best line fitting with errors in both coordinates. (The date is October 1989, by B.D. Ripley et al.) I have done a search for something similar in R withour success. Has this been implemented in a R-package, possibly under some sort of assumptions about variances. I would lke my student to apply some regression techniques to data that fit this profile. Any help is much appreciated. (If I have not done my search more carefully - my apologies.) Thanks Jacob Jacob L van Wyk Department of Mathematics and Statistics University of Johannesburg APK P O Box 524 Auckland Park 2006 South Africa Tel: +27-11-489-3080 Fax: +27-11-489-2832 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- --
Re: [R] Incompatibility with VGAM
Kjetil Brinchmann Halvorsen wrote: I just discovered that when the VGAM package (not on CRAN) is loaded, glm() doesn't work. This is because VGAM defines a family function() which gets found by glm() in place of the family function from stats. Then VGAM:::family returns an object which doesn't have a $family component, (it has a component $vfamily). I thought namespaces should protect us from this happening? Yes and no: Yes: The namespace would protect you if glm would call internally the family function such as poisson(). No: Probably you have asked something like glm(., family=poisson()). Now the first instance of poisson() in the search path is used. You are passing a call to poisson(), and this is not bound to any namespace. Of course you can specify tha namespace such as glm(., family=stats::poisson()). Uwe Ligges Kjetil __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Incompatibility with VGAM
As a workaround you could try detaching and re-attaching vgam before and after running glm. detach(package:vgam) glm(...whatever...) library(vgam) On 5/28/05, Kjetil Brinchmann Halvorsen [EMAIL PROTECTED] wrote: I just discovered that when the VGAM package (not on CRAN) is loaded, glm() doesn't work. This is because VGAM defines a family function() which gets found by glm() in place of the family function from stats. Then VGAM:::family returns an object which doesn't have a $family component, (it has a component $vfamily). I thought namespaces should protect us from this happening? Kjetil -- Kjetil Halvorsen. Peace is the most effective weapon of mass construction. -- Mahdi Elmandjra -- No virus found in this outgoing message. Checked by AVG Anti-Virus. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] text-function: adding text in an x,y-plot
Hello R-friends, i have a question to the text-function. a little test-dataset for better understanding: -the dataset was imported with read.table(,header=TRUE) s1-s10 are the samplenames var1 var2 var3 s1 112 s2 231 s3 223 s4 543 s5 423 s6 632 s7 854 s8 721 s9 932 s10864 -then i´ve performed a pincipal component analysis with prcomp -for displaying the result in a x,y-graph i transformed out.pca$x into the dataframe points points - out.pca$x points PC1 PC2PC3 s1 -4.7055777 -0.14781544 -0.3683602 s2 -3.1854599 0.19661476 1.5212455 s3 -3.2687980 0.78193513 -0.6352458 s4 0.2278948 1.00061498 0.2164108 s5 -1.4382847 0.02500633 -0.9114340 s6 0.6216283 -0.68606440 0.2071083 s7 3.4951878 1.17343675 -0.3266629 s8 1.0153619 -2.37274378 0.1978058 s9 3.3673983 -1.82145761 -0.2071739 s10 3.8706492 1.85047328 0.3063065 - with plot(points$PC1, points$PC2, type=n) i start a graph without displaying anything at the x,y-coordinates - i want now to display the samplenames at the right x,y-coordinate; i generated a dataframe called lab with the samplenames lab V1 1 s1 2 s2 3 s3 4 s4 5 s5 6 s6 7 s7 8 s8 9 s9 10 s10 - i´ve studied the text-helppage and so i tried the following: text(pca$PC1, pca$PC2, labels=lab) - in the plot there is now c(1,3,4,5,6,7,8,9,10,2) displayed instead of s1-s10 is out there any idea what i'am doing wrong? is there maybe another way of displaying the samplenames at the right x,y-coordinate? greetings from the sunny tirol with thanks in advance helli platform i386-pc-mingw32 arch i386 os mingw32 - win xp system i386, mingw32 status major2 minor1.0 year 2005 month04 day 18 language R __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] text-function: adding text in an x,y-plot
Helmut Kudrnovsky wrote: Hello R-friends, i have a question to the text-function. a little test-dataset for better understanding: -the dataset was imported with read.table(,header=TRUE) s1-s10 are the samplenames var1 var2 var3 s1 112 s2 231 s3 223 s4 543 s5 423 s6 632 s7 854 s8 721 s9 932 s10864 -then i´ve performed a pincipal component analysis with prcomp -for displaying the result in a x,y-graph i transformed out.pca$x into the dataframe points points - out.pca$x points PC1 PC2PC3 s1 -4.7055777 -0.14781544 -0.3683602 s2 -3.1854599 0.19661476 1.5212455 s3 -3.2687980 0.78193513 -0.6352458 s4 0.2278948 1.00061498 0.2164108 s5 -1.4382847 0.02500633 -0.9114340 s6 0.6216283 -0.68606440 0.2071083 s7 3.4951878 1.17343675 -0.3266629 s8 1.0153619 -2.37274378 0.1978058 s9 3.3673983 -1.82145761 -0.2071739 s10 3.8706492 1.85047328 0.3063065 - with plot(points$PC1, points$PC2, type=n) i start a graph without displaying anything at the x,y-coordinates I think points should be a matrix rather than a list or data.frame, hence the code above won't work. Instead: plot(points[,PC1], points[,PC2], type=n) - i want now to display the samplenames at the right x,y-coordinate; i generated a dataframe called lab with the samplenames lab V1 1 s1 2 s2 3 s3 4 s4 5 s5 6 s6 7 s7 8 s8 9 s9 10 s10 - i´ve studied the text-helppage and so i tried the following: text(pca$PC1, pca$PC2, labels=lab) Hmm, what is pca ??? lab - rownames(points) text(points[,PC1], points[,PC2], labels=lab) works for me. - in the plot there is now c(1,3,4,5,6,7,8,9,10,2) displayed instead of s1-s10 Quite probably you lab was a *factor* ... is out there any idea what i'am doing wrong? is there maybe another way of displaying the samplenames at the right x,y-coordinate? We cannot say what you did wrong when constructing your plot, but we know that your descibtion above is wrong, because it does not even work to generate the empty plot the way ... Please read the posting guide and rethink at least one time whether the code you are giving us is reproducible. Your code was not. Uwe Ligges greetings from the sunny tirol with thanks in advance helli platform i386-pc-mingw32 arch i386 os mingw32 - win xp system i386, mingw32 status major2 minor1.0 year 2005 month04 day 18 language R __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] text-function: adding text in an x,y-plot
Dear Helmut, The problem is that you're implicitly coercing the entire data frame lab to character, producing as.character(lab) [1] c(1, 3, 4, 5, 6, 7, 8, 9, 10, 2) The numbers themselves come from the numeric coding of the factor V1 in this data frame; as.numeric(lab$V1) shows you what's going on. Instead you could specify labels=lab$V1 in the text() command. But why put the row names in a data frame in the first place; why not simply use labels=rownames(out.pca)? I hope this helps, John John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Helmut Kudrnovsky Sent: Sunday, May 29, 2005 11:08 AM To: r-help@stat.math.ethz.ch Subject: [R] text-function: adding text in an x,y-plot Hello R-friends, i have a question to the text-function. a little test-dataset for better understanding: -the dataset was imported with read.table(,header=TRUE) s1-s10 are the samplenames var1 var2 var3 s1 112 s2 231 s3 223 s4 543 s5 423 s6 632 s7 854 s8 721 s9 932 s10864 -then i´ve performed a pincipal component analysis with prcomp -for displaying the result in a x,y-graph i transformed out.pca$x into the dataframe points points - out.pca$x points PC1 PC2PC3 s1 -4.7055777 -0.14781544 -0.3683602 s2 -3.1854599 0.19661476 1.5212455 s3 -3.2687980 0.78193513 -0.6352458 s4 0.2278948 1.00061498 0.2164108 s5 -1.4382847 0.02500633 -0.9114340 s6 0.6216283 -0.68606440 0.2071083 s7 3.4951878 1.17343675 -0.3266629 s8 1.0153619 -2.37274378 0.1978058 s9 3.3673983 -1.82145761 -0.2071739 s10 3.8706492 1.85047328 0.3063065 - with plot(points$PC1, points$PC2, type=n) i start a graph without displaying anything at the x,y-coordinates - i want now to display the samplenames at the right x,y-coordinate; i generated a dataframe called lab with the samplenames lab V1 1 s1 2 s2 3 s3 4 s4 5 s5 6 s6 7 s7 8 s8 9 s9 10 s10 - i´ve studied the text-helppage and so i tried the following: text(pca$PC1, pca$PC2, labels=lab) - in the plot there is now c(1,3,4,5,6,7,8,9,10,2) displayed instead of s1-s10 is out there any idea what i'am doing wrong? is there maybe another way of displaying the samplenames at the right x,y-coordinate? greetings from the sunny tirol with thanks in advance helli platform i386-pc-mingw32 arch i386 os mingw32 - win xp system i386, mingw32 status major2 minor1.0 year 2005 month04 day 18 language R __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] R GUI for Linux?
Hello all, I noticed that both Windows and OS X version of R have a GUI (Rconsole). Is there a GUI for Linux? I'm running Debian on which the CLI for R works just fine. Regards, - Robert __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] R GUI for Linux?
HI Robert, Of course Linux already has a console! Just type R in the Terminal console and R will start (assuming all is installed correctly). Graphics will be launched in separate windows. If you want more then the Terminal console, try: http://www.sciviews.org/_rgui/ Good luck, Sander. Robert Citek wrote: Hello all, I noticed that both Windows and OS X version of R have a GUI (Rconsole). Is there a GUI for Linux? I'm running Debian on which the CLI for R works just fine. Regards, - Robert __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Dr Sander P. Oom Animal, Plant and Environmental Sciences, University of the Witwatersrand Private Bag 3, Wits 2050, South Africa Tel (work) +27 (0)11 717 64 04 Tel (home) +27 (0)18 297 44 51 Fax +27 (0)18 299 24 64 Email [EMAIL PROTECTED] Web www.oomvanlieshout.net/sander __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Forcing ticks in plot for hclust object outside the limits
Thank you very much for your reply and your *dirty* sloution, which does the trick for me! Ale iberna - Original Message - From: Uwe Ligges [EMAIL PROTECTED] To: Ale iberna [EMAIL PROTECTED] Cc: R-help r-help@stat.math.ethz.ch Sent: Saturday, May 28, 2005 7:58 PM Subject: Re: [R] Forcing ticks in plot for hclust object outside the limits Ale iberna wrote: Hello! I have the following problem. I would like to plot the hclust object hcd (bellow, at the end of the mail) with ticks at seq(0.05,0.25,by=0.05). I tried using the code plot(hcd) and plot(hcd,axes=FALSE) axis(2,seq(0.05,0.25,by=0.05)) In both cases, the resoult is the same, ticks at 0.05 and 0.25 are not printed. I tried changing the ylim argumet in plot, however I got a warning parameter ylim couldn't be set in high-level plot() function. I would like to force those two ticks. Can this be done with axis or plot, or should I use lines? Not easy with the plot method for a hclust object, because 0.05 and 0.25 are getting clipped, because they are out od the usr coordinated of the plot. Of course you could hack plot.hclust (in Namespace stats) by modifying .../R/library/src/stats/R/hclust.R as follows (in order to provide a proper ylim argument): diff hclust.R-orig hclust.R 91c91,92 sub = NULL, xlab = NULL, ylab = Height, ...) --- sub = NULL, xlab = NULL, ylab = Height, ylim = NULL, ...) 116c117,120 .Internal(dend.window(n, merge, height, hang, labels, ...)) --- height2 - height if(!is.null(ylim)) height2 - c(range(ylim), rep(ylim[1], length(height) - 2)) .Internal(dend.window(n, merge, height2, hang, labels, ...)) Note that this quick hack is a *dirty* solution. Uwe Ligges Thanks in advance for any suggestions! Ale iberna hcd - structure(list(merge = structure(as.integer(c(-4, -5, -1, -7, -6, -10, -3, -12, -8, -2, 8, 1, -9, -11, 2, 3, -13, 4, 6, 5, 7, 9, 10, 11)), .Dim = as.integer(c(12, 2))), height = c(0.0906288626438465, 0.10278145998519, 0.114885217561497, 0.127812745765521, 0.13237798522, 0.168594637784091, 0.177187802444346, 0.209803430657638, 0.210361529934791, 0.218946973173863, 0.234000873708654, 0.235702383243089), order = as.integer(c(4, 9, 12, 6, 13, 2, 8, 3, 10, 7, 1, 5, 11)), labels = NULL, method = single, call = quote(hclust(d = d, method = single)), dist.method = NULL), .Names = c(merge, height, order, labels, method, call, dist.method), class = hclust) __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] R GUI for Linux?
On 29 May 2005 at 12:13, Robert Citek wrote: | | Hello all, | | I noticed that both Windows and OS X version of R have a GUI | (Rconsole). Is there a GUI for Linux? I'm running Debian on which | the CLI for R works just fine. $ apt-get install r-gnome ## works up until R 2.0.1 $ R --gui=gnome That said, as of R 2.1.0, the Gnome UI is no longer shipped with the R sources. Hence, I no longer provide it in the r-gnome package. However, the code is now provided in an add-one package 'gnomeGUI' on CRAN which you could install directly. Hope this helps, Dirk -- Statistics: The (futile) attempt to offer certainty about uncertainty. -- Roger Koenker, 'Dictionary of Received Ideas of Statistics' __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] R GUI for Linux?
Check out the JGR link on the web page mentioned by Sander below. On 5/29/05, Sander Oom [EMAIL PROTECTED] wrote: HI Robert, Of course Linux already has a console! Just type R in the Terminal console and R will start (assuming all is installed correctly). Graphics will be launched in separate windows. If you want more then the Terminal console, try: http://www.sciviews.org/_rgui/ Good luck, Sander. Robert Citek wrote: Hello all, I noticed that both Windows and OS X version of R have a GUI (Rconsole). Is there a GUI for Linux? I'm running Debian on which the CLI for R works just fine. Regards, - Robert __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html -- Dr Sander P. Oom Animal, Plant and Environmental Sciences, University of the Witwatersrand Private Bag 3, Wits 2050, South Africa Tel (work) +27 (0)11 717 64 04 Tel (home) +27 (0)18 297 44 51 Fax +27 (0)18 299 24 64 Email [EMAIL PROTECTED] Web www.oomvanlieshout.net/sander __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] get the bug context
Hi R-users, How to get a bug contex? My R code ran there for several hours, but a bug crashed it, printing such message like Error: subscript out of bounds. I want to use browser() to catch the bug, but I don't know which loop caused the bug (there are many loops in the code). I even don't know which line of code caused the bug. Is there any utility or something in R which can let you know which line of code causes a bug? Thanks, -Luke __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] get the bug context
Luke wrote: Hi R-users, How to get a bug contex? My R code ran there for several hours, but a bug crashed it, printing such message like Error: subscript out of bounds. I want to use browser() to catch the bug, but I don't know which loop caused the bug (there are many loops in the code). I even don't know which line of code caused the bug. Is there any utility or something in R which can let you know which line of code causes a bug? No, but ... Have you tried traceback() to see which function is the culprit? You can also set options(error = recover) to look at the objects at the time the error occured. Maybe you see which object is already defined and can derive the point of the error that way. Uwe Ligges Thanks, -Luke __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Errors in Variables
Hi, John: Thanks for the clarification. I know that the errors in X problem requires additional information, most commonly one of the variances or the correlation. The question I saw (below) indicated he had tried model of the form y ~ x (with a given covariance matrix ...), which made me think of sem. If he wants the least (orthogonal) distance, could he could get it indirectly from sem by calling sem repeatedly giving, say, a variance for x, then averaging the variances of x and y and trying that in sem? Also, what do you know about ODRpack? It looks like that might solve the least (orthogonal) distance. Thanks again for your note, John. Best Wishes, Spencer Graves John Fox wrote: Dear Spencer, The reason that I didn't respond to the original posting (I'm the author of the sem package), that that without additional information (such as the error variance of x), a model with error in both x and y will be underidentified (unless there are multiple indicators of x, which didn't seem to be the case here). I figured that what Jacob had in mind was something like minimizing the least (orthogonal) distance of the points to the regression line (implying by the way that x and y are on the same scale or somehow standardized), which isn't doable with sem as far as I'm aware. Regards, John John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Spencer Graves Sent: Saturday, May 28, 2005 4:47 PM To: Eric-Olivier Le Bigot Cc: r-help@stat.math.ethz.ch; Jacob van Wyk Subject: Re: [R] Errors in Variables I'm sorry, I have not followed this thread, but I wonder if you have considered library(sem), structural equations modeling? Errors in variables problems are the canonical special case. Also, have you done a search of www.r-project.org - search - R site search for terms like errors in variables regression? This just led me to ODRpack, which is NOT a CRAN package but is apparently available after a Google search. If it were my problem, I'd first try to figure out sem; if that seemed too difficult, I might then look at ODRpack. Also, have you read the posting guide! http://www.R-project.org/posting-guide.html? This suggests, among other things, that you provide a toy example that a potential respondant could easily copy from your email, test a few modifications, and prase a reply in a minute or so. This also helps clarify your question so any respondants are more likely to suggest something that is actually useful to you. Moreover, many people have reported that they were able to answer their own question in the course of preparing a question for this list using the posting guide. hope this helps. spencer graves Eric-Olivier Le Bigot wrote: I'm interested in this 2D line fitting too! I've been looking, without success, in the list of R packages. It might be possible to implement quite easily some of the formalism that you can find in Numerical Recipes (Fortran 77, 2nd ed.), paragraph 15.3. As a matter of fact, I did this in R but only for a model of the form y ~ x (with a given covariance matrix between x and y). I can send you the R code (preliminary version: I wrote it yesterday), if you want. Another interesting reference might be Am. J. Phys. 60, p. 66 (1992). But, again, you would have to implement things by yourself. All the best, EOL -- Dr. Eric-Olivier LE BIGOT (EOL)CNRS Associate Researcher ~~~o~o o~o~~~ Kastler Brossel Laboratory (LKB) http://www.lkb.ens.fr Université P. M. Curie and Ecole Normale Supérieure, Case 74 4 place Jussieu 75252 Paris CEDEX 05 France ~~~o~o o~o~~~ office : 01 44 27 73 67 fax: 01 44 27 38 45 ECR room: 01 44 27 47 12 x-ray room: 01 44 27 63 00 home: 01 73 74 61 87 For int'l calls: 33 + number without leading 0 On Wed, 25 May 2005, Jacob van Wyk wrote: I hope somebody can help. A student of mine is doing a study on Measurement Error models (errors-in-variables, total least squares, etc.). I have an old reference to a multi archive that contains leiv3: Programs for best line fitting with errors in both coordinates. (The date is October 1989, by B.D. Ripley et al.) I have done a search for something similar in R withour success. Has this been implemented in a R-package, possibly under some sort of assumptions about variances. I would lke my student to apply some regression techniques to data that fit this
RE: [R] Errors in Variables
Dear Spencer, -Original Message- From: Spencer Graves [mailto:[EMAIL PROTECTED] Sent: Sunday, May 29, 2005 4:13 PM To: John Fox Cc: r-help@stat.math.ethz.ch; 'Jacob van Wyk'; 'Eric-Olivier Le Bigot' Subject: Re: [R] Errors in Variables Hi, John: Thanks for the clarification. I know that the errors in X problem requires additional information, most commonly one of the variances or the correlation. The question I saw (below) indicated he had tried model of the form y ~ x (with a given covariance matrix ...), which made me think of sem. If he wants the least (orthogonal) distance, could he could get it indirectly from sem by calling sem repeatedly giving, say, a variance for x, then averaging the variances of x and y and trying that in sem? I'm not sure how that would work, but seems similar to averaging the regressions of y on x and x on y. Also, what do you know about ODRpack? It looks like that might solve the least (orthogonal) distance. I'm not familiar with ODRpack, but it seems to me that one could fairly simply minimize the sum of squared least distances using, e.g., optim. Regards, John Thanks again for your note, John. Best Wishes, Spencer Graves John Fox wrote: Dear Spencer, The reason that I didn't respond to the original posting (I'm the author of the sem package), that that without additional information (such as the error variance of x), a model with error in both x and y will be underidentified (unless there are multiple indicators of x, which didn't seem to be the case here). I figured that what Jacob had in mind was something like minimizing the least (orthogonal) distance of the points to the regression line (implying by the way that x and y are on the same scale or somehow standardized), which isn't doable with sem as far as I'm aware. Regards, John John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Spencer Graves Sent: Saturday, May 28, 2005 4:47 PM To: Eric-Olivier Le Bigot Cc: r-help@stat.math.ethz.ch; Jacob van Wyk Subject: Re: [R] Errors in Variables I'm sorry, I have not followed this thread, but I wonder if you have considered library(sem), structural equations modeling? Errors in variables problems are the canonical special case. Also, have you done a search of www.r-project.org - search - R site search for terms like errors in variables regression? This just led me to ODRpack, which is NOT a CRAN package but is apparently available after a Google search. If it were my problem, I'd first try to figure out sem; if that seemed too difficult, I might then look at ODRpack. Also, have you read the posting guide! http://www.R-project.org/posting-guide.html? This suggests, among other things, that you provide a toy example that a potential respondant could easily copy from your email, test a few modifications, and prase a reply in a minute or so. This also helps clarify your question so any respondants are more likely to suggest something that is actually useful to you. Moreover, many people have reported that they were able to answer their own question in the course of preparing a question for this list using the posting guide. hope this helps. spencer graves Eric-Olivier Le Bigot wrote: I'm interested in this 2D line fitting too! I've been looking, without success, in the list of R packages. It might be possible to implement quite easily some of the formalism that you can find in Numerical Recipes (Fortran 77, 2nd ed.), paragraph 15.3. As a matter of fact, I did this in R but only for a model of the form y ~ x (with a given covariance matrix between x and y). I can send you the R code (preliminary version: I wrote it yesterday), if you want. Another interesting reference might be Am. J. Phys. 60, p. 66 (1992). But, again, you would have to implement things by yourself. All the best, EOL -- Dr. Eric-Olivier LE BIGOT (EOL)CNRS Associate Researcher ~~~o~o o~o~~~ Kastler Brossel Laboratory (LKB) http://www.lkb.ens.fr Université P. M. Curie and Ecole Normale Supérieure, Case 74 4 place Jussieu 75252 Paris CEDEX 05 France ~~~o~o o~o~~~ office : 01 44 27 73 67 fax: 01 44 27 38 45 ECR room: 01 44 27 47 12 x-ray room: 01 44 27 63 00 home:
[R] joining files after canonical correlation
Dear R, I recently did a canonical correlation analysis on two subsets of data (location and weather). So I now have canonical scores for location and weather. but I'd now like to do a scatterplot matrix using the pairs statement. Is there a way to somehow join location.U and weather.V to become a new data set from which I could undertake a scatterplot matrix of the canonical variates? brett Brett Stansfield Environmental Scientist - Water Quality Hawke's Bay Regional Council 102 Vautier Street Private Bag 6006 Napier Phone (06) 835-9200 extn 9334 Fax (06) 835-3601 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Incompatibility with VGAM
Hello, It seems that if glm used a namespace then the conflict would be avoided? FYI, I released VGAM 0.6-3 last Friday which has binomial(), poisson() etc. removed so that it should no longer conflict with glm(). The families that work under VGAM are called binomialff(), poissonff() etc. Also, the Windows zip file for VGAM 0.6-3 was built under R 2.1.0. cheers Thomas __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] spatially constrained clustering
Hi List, does anyone know of an implementation of spatially constrained clustering in R? This is where there is a vector of measurements for points on a plane and only neighbors can be clustered together. I have tried implementint in myself -- but if someone has alkready done it ! I have searched on the obvios terms spatially constrained clustering without any luck. Bye Rob __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Nomogram
Hi, List: I heard some where about nomogram function in R, which package include this function? Thanks Yongfei __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Nomogram
From www.r-project.org - search - R site search, I got 40 hits for nomogram. The first one was for a function nomogram in the Design library. I haven't used it, but other people have, and some of the other 39 hits might answer other questions you might have in trying to use it. hope this helps. spencer graves p.s. Have you read the posting guide! http://www.R-project.org/posting-guide.html;? It has helped others (a) find answers to their own questions, and (b) improve the chances that they get useful replies when they do ask questions. Yongfei Wang wrote: Hi, List: I heard some where about nomogram function in R, which package include this function? Thanks Yongfei __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] trouble with cumsum?
Dear R users, I am using R version 2.0.1 (2004/11/15) on an i386-pc-mingw32 platform. I encounter the following problem while using cumsum: a - rep(0.01, 100) b - cumsum(a) sum(a) == 1 [1] TRUE b[100] == 1 [1] FALSE Am I missing something? Should cumsum have such an outcome? Thanks in advance for any clarifications any of you can offer. Regards, Makram Talih -- Makram Talih, Ph.D. Assistant Professor Department of Mathematics and Statistics Hunter College of the City University of New York 695 Park Avenue, Room 905 HE New York, NY 10021 Website: http://stat.hunter.cuny.edu/talih E-mail: [EMAIL PROTECTED] Tel: 212-772-5308 Fax: 212-772-4858 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] Nomogram
Spencer Graves wrote: From www.r-project.org - search - R site search, I got 40 hits for nomogram. The first one was for a function nomogram in the Design library. I haven't used it, but other people have, and some of the other 39 hits might answer other questions you might have in trying to use it. hope this helps. spencer graves p.s. Have you read the posting guide! http://www.R-project.org/posting-guide.html;? It has helped others (a) find answers to their own questions, and (b) improve the chances that they get useful replies when they do ask questions. Hi list, yes I read the posting guide and looked on R site search and searched on spatially constrained clustering I didnt think to search on nomogram which appears to be a totally different thing. See http://en.wikipedia.org/wiki/Nomogram Bye Rob __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] trouble with cumsum?
On 29 May 2005 at 20:17, Makram Talih wrote: | Dear R users, | | I am using R version 2.0.1 (2004/11/15) on an i386-pc-mingw32 platform. I | encounter the following problem while using cumsum: | | a - rep(0.01, 100) | b - cumsum(a) | sum(a) == 1 | [1] TRUE | b[100] == 1 | [1] FALSE | | Am I missing something? Yes, FAQ section 7.31 entitled Why doesn't R think these numbers are equal?. | Should cumsum have such an outcome? a - rep(0.01, 100) b - cumsum(a) sum(a) == 1 [1] FALSE all.equal(sum(a), 1) [1] TRUE all.equal(b[100], 1) [1] TRUE On my Linux system with R 2.1.0, the first equality fails whereas it worked for you. Morale: don't forget about floating-point math ... Hth, Dirk -- Statistics: The (futile) attempt to offer certainty about uncertainty. -- Roger Koenker, 'Dictionary of Received Ideas of Statistics' __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] trouble with cumsum?
R help document showed us that you should not use == for comparing objects, and you will use all.equal. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Makram Talih Sent: Monday, May 30, 2005 8:17 AM To: r-help@stat.math.ethz.ch Subject: [R] trouble with cumsum? Dear R users, I am using R version 2.0.1 (2004/11/15) on an i386-pc-mingw32 platform. I encounter the following problem while using cumsum: a - rep(0.01, 100) b - cumsum(a) sum(a) == 1 [1] TRUE b[100] == 1 [1] FALSE Am I missing something? Should cumsum have such an outcome? Thanks in advance for any clarifications any of you can offer. Regards, Makram Talih -- Makram Talih, Ph.D. Assistant Professor Department of Mathematics and Statistics Hunter College of the City University of New York 695 Park Avenue, Room 905 HE New York, NY 10021 Website: http://stat.hunter.cuny.edu/talih E-mail: [EMAIL PROTECTED] Tel: 212-772-5308 Fax: 212-772-4858 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ ÑÅ»¢Ãâ·ÑGÓÊÏä£ÖйúµÚÒ»¾øÎÞÀ¬»øÓʼþɧÈų¬´óÓÊÏä __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] Nomogram
I don't think Spencer replied to your message. It wasn't addressed to you. He was replying to a specific post on nomograms. However you might try being less specific as a search on spatial cluster gave back [R] mclust - clustering by spatial patterns http://finzi.psych.upenn.edu/R/Rhelp02a/archive/13474.html [R] Spatial Clustering http://finzi.psych.upenn.edu/R/Rhelp02a/archive/19480.html amongst others. I also did a help.search(spatial cluster) which came up with references to the package DCluster Tom -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Rob Dunne Sent: Monday, 30 May 2005 8:44 AM To: r-help@stat.math.ethz.ch Subject: Re: [R] Nomogram Spencer Graves wrote: From www.r-project.org - search - R site search, I got 40 hits for nomogram. The first one was for a function nomogram in the Design library. I haven't used it, but other people have, and some of the other 39 hits might answer other questions you might have in trying to use it. hope this helps. spencer graves p.s. Have you read the posting guide! http://www.R-project.org/posting-guide.html;? It has helped others (a) find answers to their own questions, and (b) improve the chances that they get useful replies when they do ask questions. Hi list, yes I read the posting guide and looked on R site search and searched on spatially constrained clustering I didnt think to search on nomogram which appears to be a totally different thing. See http://en.wikipedia.org/wiki/Nomogram Bye Rob __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] sapply following using by with a list of factors
Background: OS: Linux Mandrake 10.1 release: R 2.0.0 editor: GNU Emacs 21.3.2 front-end: ESS 5.2.3 - Colleagues I am having some trouble extracting results from the function by, used to average variables in a data.frame first by one factor (depth) and then by a second factor (station). The real data.frame is quite large dim(data.2001) [1] 32049 11 Here is a snippet of code: ## bin density data for each station into 1 m depth bins, containing means data.2001.test$integer.Depth - as.factor(round(data.2001.test$Depth, digits=0)) attach(data.2001.test) binned.data.2001 - by(data.2001.test[,5:11], list(depth=integer.Depth, station=Station), mean) and here is a snippet of the data.frame dim(data.2001.test) [1] 150 11 dump(data.2001.test, file=stdout()) data.2001.test - structure(list(Cruise = structure(as.integer(c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1)), .Label = Ngerin01, class = factor), Station = structure(as.integer(c(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5)), .Label = c(a1, a2, a3, a4, a5, a6, a7, a8, a9, b1, b2, b3, b4, b5, b6, b7, c1, c2, c3, c4, c5, c6, c7, d1, d2, d3, d4, d5, d6, e1, e2, e3, e4, e5, e6, e7, f1, f2, f3, f4, f5, f6, f7, f8, f9, g1, g10, g11, g2, g3, g4, g5, g6, g7, g8, g9, gsvc1, gsvc2, gsvc3, gsvc4, gsvc5, gsvc6, gsvc7, gsvc8, gsvc9, gsvd1, gsvd2, gsvd3, gsvd4, gsvd5, gsvd6, gsvd7, gsvd8, h1, h11, h2, h3, h4, h5, h6, h7, h8, h9, i1, i10, i2, i3, i4, i5, i6, i7, i8, i9, j1, j10, j2, j3, j4, j5, j6, j7, j8, j9, k1, k10, k2, k3, k4, k5, k6, k7, k8, k9, l1, l10, l11, l12, l2, l3, l4, l5, l6, l7, l8, l9, m1, m10, m11, m2, m3, m4, m5, m6, m7, m8, m9, mx, n1, n10, n11, n2, n3, n4, n5, n6, n7, n8, n9, nx, o1, o10, o11, o13, o2, o3, o4, o5, o6, o7, o8, o9, ox, p10, p11, p2, p3, p4, p5, p6, p7, p8, p9, px, q1, q10, q11, q12, q13, q2, q3, q4, q5, q6, q7, q8, q9, qx, r1, r10, r11, r12, r13, r14, r15, r2, r3, r4, r5, r6, r7, r8, r9, rx, s1, s10, s11, s12, s13, s14, s15, s16, s2, s3, s4, s5, s6, s7, s8, s9, sgc1, sgc2, sgc3, sgc4, sgc5, sgc6, sgc7, sx, t1, t10, t11, t12, t13, t14, t15, t16, t2, t3, t4, t5, t6, t7, t8, t9, tx, u1, u10, u11, u12, u13, u14, u15, u2, u3, u4, u5, u6, u7, u8, u9, ux, v1, v10, v11, v2, v3, v4, v5, v6, v7, v8, v9, vx, w2, w3, w4, w5, w6, w7, w8, w9, wx, x2, x3, x4, x5, x6, x7, x8), class = factor), Lon = c(138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.421, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.352, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.277, 138.201, 138.201 ), Lat = c(-35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766, -35.766,
Re: [R] sapply following using by with a list of factors
On 5/29/05, McClatchie, Sam (PIRSA-SARDI) [EMAIL PROTECTED] wrote: Background: OS: Linux Mandrake 10.1 release: R 2.0.0 editor: GNU Emacs 21.3.2 front-end: ESS 5.2.3 - Colleagues I am having some trouble extracting results from the function by, used to average variables in a data.frame first by one factor (depth) and then by a second factor (station). The real data.frame is quite large dim(data.2001) [1] 32049 11 Here is a snippet of code: ## bin density data for each station into 1 m depth bins, containing means data.2001.test$integer.Depth - as.factor(round(data.2001.test$Depth, digits=0)) attach(data.2001.test) binned.data.2001 - by(data.2001.test[,5:11], list(depth=integer.Depth, station=Station), mean) and here is a snippet of the data.frame dim(data.2001.test) [1] 150 11 dump(data.2001.test, file=stdout()) data.2001.test - structure(list(Cruise = structure(as.integer(c(1, 1, 1, 1, 1, Try the following. To keep this short lets just take a subset of rows called dd. Also, we drop the Station levels that are not being used since this test only uses 2 levels and there are 288 Station levels in total. The function that we apply using by returns a vector consisting of the integer.Depth, Station and the column means of columns 5 to 10. (Asking for just the mean of those, as in your example, would take all the numbers in all the columns passed to mean and give back a grand mean rather than a mean per column.) Finally we rbind it all back together. # data.2001.test is your data frame including the integer.Depth column dd - data.2001.test[50:60,] dd$Station - dd$Station[drop = TRUE] dd.bin - by(dd, list(dd$integer.Depth, dd$Station), function(x) + c(integer.Depth = x$integer.Depth[1], Station = x$Station[1], + colMeans(x[,5:10]))) do.call(rbind, dd.bin) integer.Depth StationDepth Temperature.oC Salinity Fluoresence.Volts [1,]20 1 23.90167 17.67420 35.47650 1.107433 [2,]21 1 24.75350 17.33355 35.59050 1.060400 [3,] 1 2 5.19000 19.61510 35.54870 0.726500 [4,] 2 2 5.82950 19.61305 35.55025 0.719200 [5,] 3 2 6.81250 19.61300 35.58345 0.741150 [6,] 4 2 7.55000 19.61180 35.60460 0.754600 Density.kg.m3 Brunt.Vaisala.Freq.cycl.h [1,] 25.82400 -5.095467 [2,] 25.99820 16.030975 [3,] 25.30560 -6.261240 [4,] 25.31015 4.051561 [5,] 25.33985 8.893225 [6,] 25.35960 -8.167610 __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Re: Vector Manipulation
OK...x[min(which(x!=0)):length(x)] does the trick! I guess the coffee is slowly but surely working! . Manoj - Original Message - From: ManojW To: R-help Sent: Monday, May 30, 2005 2:12 PM Subject: Re: Vector Manipulation I should clarify that I tried x[cumsum(x)!=0] but the problem is that I might have negative numbers in the vector that can potentially make cumsum(x) equal to zero somewhere down the line in the vector. Manoj - Original Message - From: ManojW To: R-help Sent: Monday, May 30, 2005 2:00 PM Subject: Vector Manipulation Dear All, For any given vector, I want to extract a sub-vector such that the new vector skips all zeros, if any , at the start of vector. Is it possible to achieve this w/o looping? E.G : x= c(0,0,1,2,3,4,5,0,0,8,9) y= somefunc(x); y [1]1 2 3 4 5 0 0 8 9 In the example above, I want to skip the two leading zeroes till I hit the non-zero (1 in the above case). I also want to retain all zero after the first non-zero digit (again 1 in this case). Hope I am not confusing you guys. Thanks in advance for your help. Regards Manoj [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
