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PC-SIG: World of Education
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smooth.hlp
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1989-02-03
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SMOOTH = expr; Enable or disable smoothing
Value of 'expr' determines whether smoothing is performed for
subsequent processing as follows:
0 => no smoothing
not 0 => enable smoothing
Use predefined constants ON and OFF to enable or disable smoothing.
With smoothing enabled, all data points in a file between
successive step times are averaged. Additionally, the time tags
associated with those data points are averaged and a value is not
output until the average time tag is beyond the current step time.
Hence the value plotted/ printed/ etc. is the average value of all
data points surrounding each step time. This mechanism helps
reduce phase distortion caused by averaging during monotonic
sections of a trace.
+
Smoothing an already smooth function will distort it.
Smoothing is only effective when there is a surplus of data points;
that is, when there are at least twice as many data points as
points to be plotted/processed (determined by STEP and DUR).