Read string from txt to gnuplot variable?

[artiny sixtee]

Hy,
I want to read from txt file (what is contain only one word) ...and use it as variable (as a string) in gnuplot. HOw can I make it?

[Ethan Merritt]

On Sunday, 12 March 2017 10:08:02 PM artiny sixtee wrote:

Hy,
I want to read from txt file (what is contain only one word) ...and use it as variable (as a string) in gnuplot. HOw can I make it?

VAR = "cat textfile"

[artiny sixtee]

Thank you for answer.

I dont know why but didnt work for me....
the lastPatch.txt contain this text:
x.png

I tried this:
VAR = "cat lastPatch.txt"

but this command make new textfile with name:
cat lastPatch.txt
and contain some undefined symbols:
‰PNG


[Bastian Märkisch]

You have to use backtics, not double quotes. See

help backquotes

[artiny sixtee]

I tried this:
VAR = ’cat lastPatch.txt’

result:
create new textfile "cat lastPatch.txt" with undefined symbols:
‰PNG


[Bastian Märkisch]

Backquotes, not single quotes. Like in

var = "`cat file.txt`"

Or try

var = system("cat file.txt")

[artiny sixtee]

thank you :) now working
var = system("cat file.txt")