KDAriane

h1. Gnuplot

h2. Synopsis

This operator has no parameter, two inputs (the GNUplot script and the data) and one output (the plot). It launches GNUplot for generating a .PNG image.

h2. Parameters

None.

h2. Inputs

2 input files : 

* the first is the @GNUplot@ script. This script uses a @@file@@ string, that is dynamically replaced with the real name by the script.

* the second is the data to be plot.

h2. Outputs

1 output: the .PNG image representing the plot.

h2. Shell Code

<pre>

#!/bin/bash

# this shell uses gnuplot with the script as first input on the data

# on the second output

# the @file@ string in the gnuplot script is replaced by the data file.

script=$1; shift

data=`echo $1 | sed 's/\//\\\\\//g'`; shift

output=$1; shift

(

    echo "set terminal png" 

    echo "set output '$output'" 

    sed "s/@file@/$data/g" $script

) > $script.plot

gnuplot $script.plot

rm $script.plot

</pre>

h2. Example

This operator is used plotting the results in the stream [[Data mining complexity]].