how to use external variable in awk

[bsmile001]

it's not about using variables defined in awk with awk, but using variables defined in another software which makes use of awk to do string treatment, say within gnuplot

I need to do something like this, use awk to filter out data within a specific range whose limit is externally defined, say

plot "< awk ' ($1<s1) || ($1>s2) { print $1, $3 } ' fort.47" u 1:2 w l

here s1, s2 are variables defined in gnuplot to specify lower and upper limit, plot is a command in gnuplot.

The above does not achieve my goal, how can I possibly improve it? Thanks,

 

[Annihilannic]

Something like this perhaps?

echo plot $(awk ' ($1<s1) || ($1>s2) { print $1, $3 } ' fort.47) u 1:2 w l | gnuplot

Annihilannic.
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[jmc0031]

Hi,

To use variable you can make like that :

awk ' ($1<s1) || ($1>s2) { print $1, $3 } ' s1=$s1 s2=$s2 fort.47

It is not very clean because you use the same name for the variable outside and inside awk. I think it is better like this :

awk ' ($1<var1) || ($1>var2) { print $1, $3 } ' var1=$s1 var2=$s2 fort.47

Regards
jmc0031