[Gnuplot-info] plot data

[horatiu <cl...@ya...>]

Hi there. I just started to use Gnuplot. I read some tutorials and I
understand a little how it works. But in real world it's more complicated. I
want to plot some data gives by a machine. The data that I have has a format
like this (5 columns separated by comma)

, .5,-1.3016, 0, 0
, 1,-1.3006, 0, 0
, 1.5,-1.2996, 0, 0
, 2,-1.2986, 0, 0
, 2.5,-1.2976, 0, 0
, 3,-1.2966, 0, 0
, 3.5,-1.2956, 0, 0
, 4,-1.2946, 0, 0
, 4.5,-1.2936, 0, 0

the first column is empty and the second contains data like .5 it means 0.5. 

set datafile separator ","
plot "CV.dat" index 2:3

but it gives me error

How can I plot 
X=column 3 vs Y=column 4 ?

Thanx a lot
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