mjhjmtu

Can I use a here document to pass a gnuplot script to gnuplot and also have commandline line arguments passed to gnuplot?

In my bash file, I would normally write:

#!/bin/bash
#set up code in here...
gnuplot -c script.gp $first $second

But I want to have everything in one bash file, so I've done

#!/bin/bash
#set up code in here...
gnuplot -c <<- EOF
do for [j=0:ARG1] 
 do for [i=4:ARG2] 
 plot '$data' index j using 2:i with lp
 

EOF $first $second

but I get the infamous warning: here-document at line 87 delimited by end-of-file (wantedEOF')`` error. $data, $first, and $second are defined earlier in the bash script.

If I put the command line arguments on the next line, to leave the EOF alone, I get command not found errors associated with the value of $first.

My here document is indented only with tabs. There is no trailing whitespace.

You could try something like:

gnuplot -c /dev/stdin "$first" "$second" <<-EOF
do for [j=0:ARG1] 
 do for [i=4:ARG2] 
 plot '$data' index j using 2:i with lp
 

EOF

Gnuplot complains

line 4: No previous filename

but then I get the same error when using a script file, so it's probably something to do with the code being incomplete.

This is one solution: get rid of the arguments, and do the replacement manually.

#!/bin/bash
#set up code in here...
gnuplot <<- EOF
do for [j=0:$first] 
 do for [i=4:$second] 
 plot '$data' index j using 2:i with lp
 

EOF