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From: Chris Elvidge <chris@mshome.net>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: What am I missing?
Date: Fri, 4 Dec 2020 19:12:00 +0000
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Xref: csiph.com comp.graphics.apps.gnuplot:4377

On 04/12/2020 04:10 pm, Al Greynolds wrote:
>  From these Gnuplot 5+ commands:
> 
> rx=2;kx=0;ry=1;ky=-1
> ex=(1+kx)/rx
> ey=(1+ky)/ry
> show variables
> 
> I get this output:
> 
>          rx = 2
>          kx = 0
>          ry = 1
>          ky = -1
>          ex = 0
>          ey = 0
> 
> Why is ex zero?
> 
> Al
> 

Note that gnuplot uses both "real" and "integer" arithmetic, like 
FORTRAN and C. Integers are entered as "1", "-10", etc; reals as "1.0", 
"-10.0", "1e1", 3.5e-1, etc. The most important difference between the 
two forms is in division: division of integers truncates: 5/2 = 2; 
division of reals does not: 5.0/2.0 = 2.5.


-- 
Chris Elvidge
England