I don't know if the following code is meant to be GNUplot-internal commands or shell commands. I don't use GNUplot. If it is the former the thread should be transferred to Unix and Linux Applications/ as it is applications-related.

As long as i don't know i will treat the following as shell code.

The first line is faulty because shell variables can't be named that way and "SIa(x)" is not a valid name. Have a look at the man page of the shell you are using (most likely man ksh or man bash) abount which characters are allowed and which aren't.

The second line uses (again!) variables without expanding them, as you have been told already in this thread.

If you want to use arrays (which is possible in ksh) you have to do it this way:

Code:

var[1]="abc"             # definition
var[2]="def"
var[3]="ghi"

echo ${var[1]}           # usage 1 - fixed indexes
echo ${var[2]}
string="${var[1]}${var[2]}"

i=1                      # usage 2 - indexed by a variable
while [ $i -le 3 ] ; do
      echo ${var[$i]}
     (( i += 1 ))
done

# specialities: handle the complete array

number_of_elements=${#var[*]}
echo $number_of_elements

echo "print whole arrays content: " ${var[@]}
echo "print whole arrays content: " ${var[*]}

I hope this helps.

bakunin