Re: [Gnuplot-info] [Gnuplot-bugs] Problem of Interpretation

[<br...@ph...>]

r....@ma... wrote:
> Results depends on the location of parameter "a" in the plot command 
> line. It turns out to be that the 1st plot is right, but the second plot 
> (just the same equation but written differently) is wrong.

The cause of this probably is that you missed one important detail about 
gnuplot's mathematical expression syntax: just like C, it distinguishes 
between integers and floating-point numbers.  See "help expressions"

All your 'a' values are integers, and several of the constants used in 
the equations are, too.  In particular 60/a is not what you might think 
it is, if 'a' is an integer.  Your example boils down to this:

gnuplot> a=100
gnuplot> print 60*pi/a
1.88495559215388
gnuplot> print 60/a*pi
0.0