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.
