Re: Graph feature request

[Jeff Kingston]

On Sat, 17 Nov 2001 22:55:28 +0300 (MSK), Joe Beach wrote:
  > 
  > Hi,
  > 
  > I currently use Gnuplot to do my plotting. I like it for several reasons,
  > one of which is that it can read the data from specific columns of a text
  > file. For example, use the second column of file.txt for the x-values and
  > the fourth column of file.txt for the y-values. As far as I have been able
  > to see, there is no way to have Lout do this- you could use an @Include to
  > read a text file if x is in the first column and y is in the second
  > column, but that is about it. Is this a feature you would consider for a
  > later release?
  > 
  > Joe Beach

Are you on Unix?  Use "cut" in a @Filter:

   def @Cols
     left cutopts
     right x
   {
      def @Filter { "cut " cutopts @FilterIn ">" @FilterOut }

      x
   }

and then you can write

   @Data { "-f4,2" @Cols {
   @Include { mydata.txt }
   }

At least, that's the basic idea.

Jeff