146 WM-OM-E Rev I
fwxx Full Width at xx% Maximum
Definition:
Determines the width of the largest area peak, measured between bins on either
side of the highest bin in the peak that have a population of xx% of the highest's
population. If several peaks have an area equal to the maximum population, the
leftmost peak is used in the computation.
Description:
First, the highest population peak is identified and the height of its highest bin
(population) determined (see the pks description). Next, the bin populations to
the right and left are found until a bin on each side is found to have a population
of less than xx% of that of the highest bin. A line is calculated on each side, from
the center point of the first bin below the 50% population to that of the adjacent
bin, towards the highest bin. The intersection points of these lines with the xx%
height value is then determined. The length of a line connecting the intersection
points is the value for fwxx.
Example:
fwxx with threshold set to 35%:
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