Re: [R] boxplot() from list
On Sun, 2004-09-12 at 10:10, Laura Quinn wrote: I have a list containing 48 objects (each with 30 rows and 4 columns, all numeric), and wish to produce 4 boxplot series (with 48 plots in each) , one for each column of each object. Basically I want a boxplot from boxplot(mylist[[]][,i]) for i in 1:4. It seems that I can create a boxplot of length 48 from the entire list, but I don't seem able to subscript to return 4 boxplots from the list - I have also tried to create 4 new lists (one for each column of each object) by using variations on the following, but none seems to work: newlist-oldlist[,1] newlist-oldlist[[]][,1] newlist-oldlist[[]][,$colone] can anyone please offer some insight?? Thanks in advance, For each individual boxplot, you could do something like: boxplot(data.frame(sapply(mylist, function(x) x[, 1]))) adjusting the index (1) for each of the four columns in your list matrices. You can then adjust the additional arguments to boxplot() as you require. See ?sapply for more information on accessing list member elements and returning a vector or matrix. HTH, Marc Schwartz __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
RE: [R] boxplot() from list
Dear Laura, You don't say what kind of objects are in the list, but suppose that they are matrices; here's a scaled-down example using 3 list elements: M1 - matrix(rnorm(30*4), 48, 4) M2 - matrix(rnorm(30*4), 48, 4) M3 - matrix(rnorm(30*4), 48, 4) L - list(M1=M1, M2=M2, M3=M3) par(mfrow=c(3, 4)) lapply(L, function(x) apply(x, 2, boxplot)) I hope that this helps, John -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Laura Quinn Sent: Sunday, September 12, 2004 10:10 AM To: [EMAIL PROTECTED] Subject: [R] boxplot() from list I have a list containing 48 objects (each with 30 rows and 4 columns, all numeric), and wish to produce 4 boxplot series (with 48 plots in each) , one for each column of each object. Basically I want a boxplot from boxplot(mylist[[]][,i]) for i in 1:4. It seems that I can create a boxplot of length 48 from the entire list, but I don't seem able to subscript to return 4 boxplots from the list - I have also tried to create 4 new lists (one for each column of each object) by using variations on the following, but none seems to work: newlist-oldlist[,1] newlist-oldlist[[]][,1] newlist-oldlist[[]][,$colone] can anyone please offer some insight?? Thanks in advance, Laura Quinn Institute of Atmospheric Science School of Earth and Environment University of Leeds Leeds LS2 9JT __ [EMAIL PROTECTED] 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] boxplot() from list
On Sun, 12 Sep 2004, Marc Schwartz wrote: On Sun, 2004-09-12 at 10:10, Laura Quinn wrote: I have a list containing 48 objects (each with 30 rows and 4 columns, all numeric), and wish to produce 4 boxplot series (with 48 plots in each) , one for each column of each object. Basically I want a boxplot from boxplot(mylist[[]][,i]) for i in 1:4. It seems that I can create a boxplot of length 48 from the entire list, but I don't seem able to subscript to return 4 boxplots from the list - I have also tried to create 4 new lists (one for each column of each object) by using variations on the following, but none seems to work: newlist-oldlist[,1] newlist-oldlist[[]][,1] newlist-oldlist[[]][,$colone] can anyone please offer some insight?? Thanks in advance, For each individual boxplot, you could do something like: boxplot(data.frame(sapply(mylist, function(x) x[, 1]))) adjusting the index (1) for each of the four columns in your list matrices. You can then adjust the additional arguments to boxplot() as you require. See ?sapply for more information on accessing list member elements and returning a vector or matrix. I think that is overly complex, as boxplot accepts a list. I had tested (but decided not to send) mylist - vector(list, 48) for(i in 1:48) mylist[[i]] - matrix(rnorm(30*4), 30) for (J in 1:4) boxplot(lapply(mylist, function(x, j) x[, j], j = J)) -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] boxplot() from list
On Sun, 2004-09-12 at 11:42, Prof Brian Ripley wrote: On Sun, 12 Sep 2004, Marc Schwartz wrote: On Sun, 2004-09-12 at 10:10, Laura Quinn wrote: I have a list containing 48 objects (each with 30 rows and 4 columns, all numeric), and wish to produce 4 boxplot series (with 48 plots in each) , one for each column of each object. Basically I want a boxplot from boxplot(mylist[[]][,i]) for i in 1:4. It seems that I can create a boxplot of length 48 from the entire list, but I don't seem able to subscript to return 4 boxplots from the list - I have also tried to create 4 new lists (one for each column of each object) by using variations on the following, but none seems to work: newlist-oldlist[,1] newlist-oldlist[[]][,1] newlist-oldlist[[]][,$colone] can anyone please offer some insight?? Thanks in advance, For each individual boxplot, you could do something like: boxplot(data.frame(sapply(mylist, function(x) x[, 1]))) adjusting the index (1) for each of the four columns in your list matrices. You can then adjust the additional arguments to boxplot() as you require. See ?sapply for more information on accessing list member elements and returning a vector or matrix. I think that is overly complex, as boxplot accepts a list. I had tested (but decided not to send) mylist - vector(list, 48) for(i in 1:48) mylist[[i]] - matrix(rnorm(30*4), 30) for (J in 1:4) boxplot(lapply(mylist, function(x, j) x[, j], j = J)) Fair enough. I did not want to presume that the remaining arguments to boxplot might be the same for each plot. Though one could also put those into an appropriate structure and still do the loop. Also, if using the display, one would probably want to set par(ask = TRUE), lest the four plots flash by in rapid sequence. Marc __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
