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Re: accesssing shell array variable with a gnuplot loop index

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Subject	Re: accesssing shell array variable with a gnuplot loop index
From	fh.faraz.hussain@gmail.com
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Hello,

I got this to work by using "${var[*]}": 

http://unix.stackexchange.com/questions/52453/gnuplot-shell-variable-substitution-and-arrays

Best
Faraz

On Saturday, October 20, 2012 10:22:33 PM UTC-4, fh.faraz...@gmail.com wrote:
> Hello all,
> 
> 
> 
> I need to use shell variables in my gnuplot commands, for which I'm using the here document style. I also need to use loops inside the gnuplot code. Both these things are working.
> 
> 
> 
> Now -- I want to use a gnuplot for loop's index to access a shell array variable. This is where I've been stuck all day.
> 
> 
> 
> I have something like this:
> 
> 
> 
> for ((i=0; i<=10; i++))
> 
> do
> 
> var[$i] = i*10
> 
> done
> 
> 
> 
> gnuplot<<EOF
> 
> do for [j=1:10]{
> 
> #need to access ${var[j]} somehow
> 
> val=sprintf("${var[%d]", j) ##doesn't work
> 
> }
> 
> EOF
> 
> 
> 
> (Individual access like ${var[1]} works.) 
> 
> 
> 
> I thought of first storing the *name* of the shell variable somewhere and then dereferencing it (using $), but didn't work. 
> 
> 
> 
> I suspect this may need using backquotes and/or expr, but am not sure. The manual mentions the 'value' command which seems to be what would be required here, but I couldn't get it to work. The 'evaluate' command also looks relevant. I have been reading the bash and gnuplot manuals -- have learned a lot the past few hours, but couldn't solve the problem.
> 
> 
> 
> 
> 
> Best
> 
> Faraz

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accesssing shell array variable with a gnuplot loop index fh.faraz.hussain@gmail.com - 2012-10-20 19:22 -0700
  Re: accesssing shell array variable with a gnuplot loop index fh.faraz.hussain@gmail.com - 2012-10-21 13:59 -0700

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