Datasheet

to use! But if you can't afford a professional math/plotting package such as Mathematica or

Matlab, Gnuplot can do a lot!

We're not good enough to provide a full tutorial on gnuplot, here are a few links we found

handy. Google will definately help you find even more tutorials and links. Mucking about is

the best teacher, too!

http://www.cs.hmc.edu/~vrable/gnuplot/using-gnuplot.html (http://adafru.it/c7i)

http://www.duke.edu/~hpgavin/gnuplot.html (http://adafru.it/c7k)

http://www.ibm.com/developerworks/library/l-gnuplot/ (http://adafru.it/c7m)

We found the following commands executed in order will generate a nice graph of this data,

be sure to put LOGTEST.CSV in the same directory as wgnuplot.exe (or if you know how

to reference directories, you can put it elsewhere)

set xlabel "Time" # set the lower X-axis label to 'time'

set xtics rotate by -270 # have the time-marks on their side

set ylabel "Light level (qualitative)" # set the left Y-axis label

set ytics nomirror # tics only on left side