Re: [R] Using column length in plot gives error
MikSmith mike at hsm.org.uk writes: I'm trying to write a generic script for processing some data which finishes off with some plots. Given Im never sure how many columns will be in my dataframe I wanted to using the following plot(spectra.wavelength, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) however even if I specify as type=l it appears plot as points (right hand plot). If I specify a range such as plot(650:700, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it looks good (left hand plot). If I try something like: The example is not reproducible so we can only guess. I assume spectra.wavelength is a matrix, so the matrix x/y values are plotted. In the second example the first parameter is definitively a vector. Dieter __ 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] Using column length in plot gives error
Hi Stephanie Absolutely right! My CSV was imported as a factor. Reading the R FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-I-convert-factors-to-numeric_003f I actually need to do: as.numeric(as.character(spectra.wavelength)) to get back to my original data. Many thanks for the pointer mike Stephanie Kovalchik wrote: Is spectra.wavelength a factor? If so, plot will treat it as categorical and not draw a line. Try the following modification. plot(as.numeric(spectra.wavelength), cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) Quoting MikSmith m...@hsm.org.uk: Hi I'm trying to write a generic script for processing some data which finishes off with some plots. Given Im never sure how many columns will be in my dataframe I wanted to using the following plot(spectra.wavelength, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) however even if I specify as type=l it appears plot as points (right hand plot). If I specify a range such as plot(650:700, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it looks good (left hand plot). If I try something like: plot(spectra.wavelength[1]:spectra.wavelength[length(spectra.wavelength)], cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it fails with variable lengths differ and when I look at spectra.wavelength[1] it gives me the value but then states there are 53 levels. What does this mean and how can I get the result I want??! many thanks mike http://www.nabble.com/file/p23562717/1.pdf 1.pdf -- View this message in context: http://www.nabble.com/Using-column-length-in-plot-gives-error-tp23562717p23562717.html Sent from the R help mailing list archive at Nabble.com. __ 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. -- View this message in context: http://www.nabble.com/Using-column-length-in-plot-gives-error-tp23562717p23582038.html Sent from the R help mailing list archive at Nabble.com. __ 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] Using column length in plot gives error
Is spectra.wavelength a factor? If so, plot will treat it as categorical and not draw a line. Try the following modification. plot(as.numeric(spectra.wavelength), cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) Quoting MikSmith m...@hsm.org.uk: Hi I'm trying to write a generic script for processing some data which finishes off with some plots. Given Im never sure how many columns will be in my dataframe I wanted to using the following plot(spectra.wavelength, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) however even if I specify as type=l it appears plot as points (right hand plot). If I specify a range such as plot(650:700, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it looks good (left hand plot). If I try something like: plot(spectra.wavelength[1]:spectra.wavelength[length(spectra.wavelength)], cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it fails with variable lengths differ and when I look at spectra.wavelength[1] it gives me the value but then states there are 53 levels. What does this mean and how can I get the result I want??! many thanks mike http://www.nabble.com/file/p23562717/1.pdf 1.pdf -- View this message in context: http://www.nabble.com/Using-column-length-in-plot-gives-error-tp23562717p23562717.html Sent from the R help mailing list archive at Nabble.com. __ 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.
[R] Using column length in plot gives error
Hi I'm trying to write a generic script for processing some data which finishes off with some plots. Given Im never sure how many columns will be in my dataframe I wanted to using the following plot(spectra.wavelength, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) however even if I specify as type=l it appears plot as points (right hand plot). If I specify a range such as plot(650:700, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it looks good (left hand plot). If I try something like: plot(spectra.wavelength[1]:spectra.wavelength[length(spectra.wavelength)], cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it fails with variable lengths differ and when I look at spectra.wavelength[1] it gives me the value but then states there are 53 levels. What does this mean and how can I get the result I want??! many thanks mike -- View this message in context: http://www.nabble.com/Using-column-length-in-plot-gives-error-tp23562704p23562704.html Sent from the R help mailing list archive at Nabble.com. __ 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] Using column length in plot gives error
Hi I'm trying to write a generic script for processing some data which finishes off with some plots. Given Im never sure how many columns will be in my dataframe I wanted to using the following plot(spectra.wavelength, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) however even if I specify as type=l it appears plot as points (right hand plot). If I specify a range such as plot(650:700, cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it looks good (left hand plot). If I try something like: plot(spectra.wavelength[1]:spectra.wavelength[length(spectra.wavelength)], cormat, type = l, ylim=c(-1,1), xlab=Wavelength (nm), ylab=Correlation) it fails with variable lengths differ and when I look at spectra.wavelength[1] it gives me the value but then states there are 53 levels. What does this mean and how can I get the result I want??! many thanks mike http://www.nabble.com/file/p23562717/1.pdf 1.pdf -- View this message in context: http://www.nabble.com/Using-column-length-in-plot-gives-error-tp23562717p23562717.html Sent from the R help mailing list archive at Nabble.com. __ 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.
