On Wed, Dec 17, 2003 at 10:09:59PM +0530, Sridhar M.A. wrote: > On Wed, Dec 17, 2003 at 07:47:22AM -0700, Paul E Condon wrote: > > On Wed, Dec 17, 2003 at 01:57:22PM +0100, David Fokkema wrote: > > > > > > I was not entirely sure what to put in the subject line... > > > > Sorry I missed your original post. > > > > I did a very simple physics experiment involving two strings, two > > > weights and one pulley. I'll spare you the details, but by varying one > > > of the two masses, I measured the angle one of the strings made with the > > > vertical. I got these results: > > > > > > # m2 alpha > > > 0 0 > > > 10 12 > > > 20 23 > > > 30 32 > > > 15 18 > > > 25 27 > > > 12 14 > > > 22 24 > > > 27 29 > > > 17 20 > > > > > > where the first column is the mass of the second weight and alpha is the > > > angle, in which I made an error of ?1 degree. So far, so good. > > > > > > Now, I want to plot in gnuplot the following: m2 along the x-axis, but > > > the tangent of alpha with errorbars along the y-axis. So, I have to > > > process this data somewhat further to obtain a second data file with > > > three columns: m2, tan alpha-low, tan alpha-high. > > > > Gnuplot itself can handle these things: I just copied your data into a > file test.dat, ran gnuplot and issued this command: > > gnuplot> plot "test.dat" using ($1):(tan($2) > > Plots m2 vs tan(alpha). Play around these and you can do most of things > from within gnuplot itself.
I didn't know this, thanks! Doing a linear fit is going to be a bit harder now... David -- Hi! I'm a .signature virus. Copy me into your ~/.signature to help me spread! -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
