How to Create a Spider Plot in Gnuplot?

Question

I would like to produce a spider (aka radar/star) plot using Gnuplot where different axes have independent scales. I am able to produce such a plot using OriginPro (commercial), but with Gnuplot I am only able to set a radar plot with uniform scale.

The (csv file) dataset looks like the following (first row is column labels):

# FEATURE, Product_A, Product_B, Product_C, Product_D
attribute_1, 2, 10, 7, 3.5
attribute_2, 1, 0.5, 3,4
attribute_3, 37, 58, 49, 72
attribute_4, 1985, 1992, 2006, 2010
attribute_5, 0.1, 0.5, 0.3, 0.8

and the plot I am looking for is this one: https://www.dropbox.com/s/uvqubzqvm6puhb8/spider.pdf - As you can see each axis stands for a different attribute, and has its own scale.

I guess the Gnuplot starting code is:

set polar
set grid polar
set angles degrees
set size square
set style data filledcurves

But I don't know how to proceed. Any suggestions?

Answer 1

here's a hack attempt..

set nokey
set polar
set grid polar
set angles degrees
set size square
set style data lines
a1=0
a2=30
a3=100
a4=200
a5=300
set arrow nohead from 0,0 to first 10*cos(a1) , 10*sin(a1)
set arrow nohead from 0,0 to first 10*cos(a2) , 10*sin(a2)
set arrow nohead from 0,0 to first 10*cos(a3) , 10*sin(a3)
set arrow nohead from 0,0 to first 10*cos(a4) , 10*sin(a4)
set arrow nohead from 0,0 to first 10*cos(a5) , 10*sin(a5)
set xrange [-10:10]
set yrange [-10:10]
plot '-' using ($1==1?a1:($1==2?a2:($1==3?a3:($1==4?a4:($1==5?a5:$1))))):2 lt 2
1 4
2 8
3 6
4 9
5 5
1 4