Data are processed via normal (rawmath) funtions.
This can become really slow if too many datapoints/functions are asked.
The available params are:

<param name="background" value="hexcolor value">
<param name="foreground" value="hexcolor value">
<param name="dataurl" value="url">
<param name="height" value="integer">
<param name="width" value="integer">
<param name="function" value="String1,String2,String3...">
<param name="smooth" value="0/1"">
<param name="names" value="names function1,name function2 ... or left blank ">
<param name="xmin" value="minimum x-value or left blank for auto detection">
<param name="xmax" value="maximum x-value or left blank for auto detection">
<param name="ymin" value="minimum y-value or left blank for auto detection">
<param name="ymax" value="maximum y-value or left blank for auto detection">
<param name="xlog" value="x-axis is log-scale: 0 or 1: default 0">
<param name="ylog" value="y-axis is log-scale: 0 or 1: default 0">
<param name="color" value="0 or 1 :default 1">
<param name="xtics" value=" zero 0, one 1, two 2, pi 3.1428, four "jan 2008", five 5.... or left blank ">
<param name="ytics" value="thing1 0, thing2 1, thing3 2, three 3, four 4, five 5...or left blank ">
<param name="xlabel" value="label of the x-axis: default x-axis">
<param name="ylabel" value="label of the y-axis: default y-axis" >
<param name="title" value="title of the plot" >