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Groups > comp.graphics.apps.gnuplot > #1504

Re: Group by lines

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On Tuesday, November 27, 2012 3:25:35 PM UTC+2, Karl wrote:
> Am 27.11.2012 13:38, schrieb ampartzisath@gmail.com:
> 
> > Hi all 
> 
> > Im new to Gnuplot.
> 
> > I have a simple file with columns of numbers and i want to plot not line by line but to gather some of them add the values and plot it as one line.
> 
> > 
> 
> > Something like this
> 
> > 
> 
> > 4 5 6 7            8 11 13 16
> 
> > 4 6 7 9  --->>  
> 
> > 5 9 9 0            7 14 15 9
> 
> > 2 5 6 9
> 
> > 
> 
> > 
> 
> 
> 
> Bit tricky, but can be done: (example for two columns, plotting the sum
> 
> of four lines as the value for the last of them)
> 
> 
> 
> 
> 
> fname="test.dat"
> 
> i=0; c1=0; c2=0
> 
> 
> 
> plot fname using  \
> 
> 	((i=i+1, c1=c1+$1, i == 4) ? (     c1_=c1, c1=0, c1_) : (NaN)):\
> 
>         ((       c2=c2+$2, i == 4) ? (i=0, c2_=c2, c2=0, c2_) : (NaN))
> 
> 
> 
> 
> 
> Best load this from a script file.
> 
> 
> 
> The idea is that an expression like (i=i+1, c=c+i, 15) first executes
> 
> the two assignments, but then only returns 15.
> 
> 
> 
>   Karl

Thanks Karl i look into it..
Can i make another question?
Is there a way to choose what line to plot?like we do with the columns?

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Group by lines ampartzisath@gmail.com - 2012-11-27 04:38 -0800
  Re: Group by lines Karl <mail.kfr@gmx.net> - 2012-11-27 14:23 +0100
    Re: Group by lines Nasos Abartzis <ampartzisath@gmail.com> - 2012-11-27 05:58 -0800
      Re: Group by lines Karl <ratzsch@polymer.uka.de> - 2012-11-28 17:53 +0100

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