A: A spiderplot works by dividing the analytical data with the normalised value specified in the plot’s xml file. A spiderplot xml file consists of a list of elements and the normalisation value for each element. For example, if you want to create a spiderplot that normalises to the following values:

La of 50 ppm, Ce of 100 ppm, Dy of 5 ppm

You will then need to edit the values bracketed by <m> </m> (shown in bold in the text below). The spiderplot will divide by these values to normalise the plot.

<transformation_mx_c name=”test”>

                                <Comment>test</Comment>

                                <Reference>test</Reference>

                                                <element name=”La”  unit=”ppm”>

                                                                <m>50</m>

                                                                <c>0</c>

                                                </element>

                                                <element name=”Ce”  unit=”ppm”>

                                                                <m>100</m>

                                                                <c>0</c>

                                                </element>

                                                <element name=”Dy”  unit=”ppm”>

                                                                <m>5</m>

                                                                <c>0</c>

                                                </element>

                </transformation_mx_c>

For more information on how to set up custom spider plot and a guide on normalisation see:
Spider Plot and Normalisation.pdf