Plotting vectors

[maasha]

I would like to get this example to work using ruby_gnuplot:

http://stackoverflow.com/questions/16541040/how-do-i-use-gnuplot-to-plot-a-simple-2d-vector-arrow

However, my attempt is not working. I think the problem is, I don't know what Dataset.new does. If this could be fixed, I would like to contribute it to the /examples.

#!/usr/bin/env ruby

require 'gnuplot'

data = [
  [0, 0,  0.5, 0.5],
  [0, 1, -0.5, 0.5],
  [1, 1,  1,   0]
]

Gnuplot.open do |gp|
  Gnuplot::Plot.new(gp) do |plot|
    plot.term   "dumb"
    plot.output "/dev/stderr"

    plot.data << Gnuplot::DataSet.new(data) do |ds|
      ds.using = "1:2:3:4"
      ds.with  = "vectors filled head lw 3"
    end
  end
end

[rdp]

if it gets really impossible you can always just cut a gnuplot "raw" file
instead of using the gem...for super complex things I do that.

On Fri, Oct 24, 2014 at 10:07 AM, maasha [email protected] wrote:

I would like to get this example to work using ruby_gnuplot:

http://stackoverflow.com/questions/16541040/how-do-i-use-gnuplot-to-plot-a-simple-2d-vector-arrow

However, my attempt is not working. I think the problem is, I don't know
what Dataset.new does. If this could be fixed, I would like to contribute
it to the /examples.

#!/usr/bin/env ruby

require 'gnuplot'

data = [
[0, 0, 0.5, 0.5],
[0, 1, -0.5, 0.5],
[1, 1, 1, 0]
]

Gnuplot.open do |gp|
Gnuplot::Plot.new(gp) do |plot|
plot.term "dumb"
plot.output "/dev/stderr"

plot.data << Gnuplot::DataSet.new(data) do |ds|
  ds.using = "1:2:3:4"
  ds.with  = "vectors filled head lw 3"
end

end
end

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[maasha]

Plotting a bunch of vectors should be dead simple. I acknowledge that GNUplot is not easily modelled with Ruby, which is a shame.