[R] problem reading from serial connection since 2.10.0
Dear list, I have a balance connected to the serial port of a windows machine (COM1) and I read the text output of the balance with scan(COM1, what=character, sep=\n, n=1) after calling the previous line I press the print key on the balance which triggers sending one line of text to the serial connection and with R 2.9.2 I get something like Read 1 item + 32.004 mg Now with R 2.10.1 (and previously with 2.10.0) I have to press the print key on the balance twice to get the same result, thus apparently I have to send two lines of text to make scan() reading only one. But this is only when reading from the serial port, not when reading from a text file on disk. The same is true for 2.10.1 on Linux (I did not try 2.9.2 nor 2.10.0 on Linux). I can't figure out from the documentation nor the NEWS whether something should be specified differently when calling scan since 2.10.0. Any ideas what this behaviour comes from? Here the sessionInfo() for the three cases I have tested: R version 2.9.2 (2009-08-24) i386-pc-mingw32 locale: LC_COLLATE=German_Germany.1252;LC_CTYPE=German_Germany.1252;LC_MONETARY=German_Germany.1252;LC_NUMERIC=C;LC_TIME=German_Germany.1252 attached base packages: [1] stats graphics grDevices utils datasets [6] methods base respectively: R version 2.10.1 (2009-12-14) i386-pc-mingw32 locale: [1] LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252 [3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C [5] LC_TIME=German_Germany.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base respectively: R version 2.10.1 (2009-12-14) x86_64-unknown-linux-gnu locale: [1] LC_CTYPE=de_DE.UTF-8 LC_NUMERIC=C [3] LC_TIME=de_DE.UTF-8LC_COLLATE=de_DE.UTF-8 [5] LC_MONETARY=C LC_MESSAGES=de_DE.UTF-8 [7] LC_PAPER=de_DE.UTF-8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=de_DE.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils methods base other attached packages: [1] lattice_0.17-26 RODBC_1.3-1 loaded via a namespace (and not attached): [1] grid_2.10.1 Thanks a lot! Tom __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] how do I plot a regression curve with the data?
?curve
regards,
Tom
Ken Ervin schrieb:
I have a data set of 6 or so ordered pairs, and I've been able to graph
them and have decided to use a high-order polynomial regression. I've
used the following piece of code:
regression - function(x,y) {
x - c(insert_numbers_here)
y - c(insert_other_numbers_here)
fit - lm(y ~ x + I(x^2) + I(x^3) + I(x^4) + I(x^5) + I(x^6) + I(x^7)
+ I(x^8) + I(x^9))
summary(fit)
This gives me the coefficients for the regression very nicely, but I
would like to plot both the data and the regression curve together. How
do I plot that regression curve as a function, and can I put it on the
same set of axes as my data scatter plot?
Thanks in advance for your help!
-KE
__
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Re: [R] reset par() within plot layout
I think it would be much easier to use grid-graphics for your task. It's made for such things. This is a good introduction: Paul Murrell. The grid graphics package. R News, 2(2):14-19, June 2002 Tom __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] reset par() within plot layout
Janke, Janke ten Holt schrieb: Dear list, I would like to produce a matrix of plots, where par() is reset after each plot (see below [simplified] example). When I use layout() to do so, I seem to also reset the layout. I have not been able to figure out how to prevent this from happening. Any help is greatly appreciated! Janke Example code: #Desired result is a layout of 2 plots: one red and one black layout(matrix(1:2, nr=2)) par.ini - par(no.readonly=TRUE) look at par.ini: it's a list with all the argument-value pairs for par(). You might be able to solve your problem by removing the appropriate elements from par.ini before calling par(par.ini). Do the following to look which ones need to be kept for the layout: par() layout(matrix(1:2, nr=2)) par() Tom par(col=red) plot(1:100) par(par.ini) plot(1:10) -- Janke ten Holt Dept. of Psychology/Sociology University of Groningen, the Netherlands __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Change positions of columns in data frame
You can change the order of nearly everything just by applying an appropriate index and assigning to the original object. Something like data - data[,order_of_columns] Tom Joel Fürstenberg-Hägg schrieb: Hi all, Probably a simple question, but I just can't find a simple answear in the older threads or anywhere else. I've added some new vectors as columns in a data frame using cbind(). As they're all put as the last columns inte the data frame, I would like to move them to specific positions. How do you do to change the position of a column in a data frame? I know I can use fieldTrial0809=data.frame(Sample_ID=as.factor(fieldTrial0809$Sample_ID), Plant_ID=as.factor(fieldTrial0809$Plant_ID), ...) to create a new data frame with the given columns in the specified order, but there must be an easier way..? All the best, Joel _ Nya Windows 7 - Hitta en dator som passar dig! Mer information. http://windows.microsoft.com/shop [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- Technische Universität München Department für Pflanzenwissenschaften Lehrstuhl für Grünlandlehre Am Hochanger 1 85350 Freising / Germany Phone: ++49 (0)8161 715324 Fax: ++49 (0)8161 713243 email: tom.gottfr...@wzw.tum.de http://www.wzw.tum.de/gruenland __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
