PLEASE provide commented, minimal, self-contained, reproducible code. particularly a sample data.set. At the moment it sounds like you have one variable (Wavelength) with a length of 56 and Reflectance with a length of 5,000. What format(s) are the data in? Data.frames?
Clearly this is not the case but I don't understand the data layout at all --- On Tue, 10/27/09, Servet Ahmet Cizmeli <sa.cizm...@usherbrooke.ca> wrote: > From: Servet Ahmet Cizmeli <sa.cizm...@usherbrooke.ca> > Subject: [R] automatically adjusting axis limits > To: r-help@r-project.org > Received: Tuesday, October 27, 2009, 2:12 PM > Dear R users, > > I am a newbie. Just switched from MATLAB. So thanks a lot > for your > patience. > > I have 50000 spectra collected in field. Each spectra has > two columns : > Wavelength (56) and the actual measurement. > > Each measurement came in a different .txt file on disk > (50000 files in > total). I wrote a script that reads every spectra in a for > loop and > constructs two variables : > > Wavelength (56) and Reflectance (56x50000). I would like to > plot > Reflectance vs Wavelength i.e. overlay 50000 spectra one > one top of the > other. > > plot(Wavelength, Reflectance) does not work (Matlab would > do it): > > Error in xy.coords(x, y, xlabel, ylabel, log) : > 'x' and 'y' lengths differ > > > I then tried to construct the two matrices so that they > have the same size > (56x50000) and plot it all at once with the command "plot". > This works but > it is such a computationally inefficient way that I do not > want to do this > Why redundantly store wavelength data? Later I will have to > process much > more spectra so this is not a good practice for me. > > I then decided to draw the first spectra on the first run > of the for loop > with the command "plot" and add the subsequent graphs with > the command > "lines". This works but the y-axes limits do not adjust > automatically, > leaving many spectra out of the axis limits ;( > > I don't want to set the axis limits by hand as I need this > script to be > completely autonomous. I don't want to program lines of > code to calculate > those limits myself either.... I am sure the mighty R can > do it... BUT > HOW???? (Matlab would easily do it with a single command) > > What I need is a command that will redraw the graph by > automatically > adjusting the axis limits. I have been searching for many > days on the web, > forums and mailing list archives but I still don't know how > to do it. > Please help > > thanks a lot from advance for your kindly help > Servet > > ______________________________________________ > 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. > __________________________________________________________________ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/ ______________________________________________ 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.
