Function Reference 177
imc CANSAS Users Manual - Doc. Version 1.9 - 05.12.2014© 2014 imc Meßsysteme GmbH
4.10.62 Standard deviation
Channel for which the standard deviation of values within each reduction interval
is computed
Data rate of the result channel
Sequence of standard deviation values representing each reduction interval in the
input channel
Description: The value for the standard deviation is calculated for each reduction interval within the
input channel signal. The reduction interval is equal to the result channel's clock pulse rate.
Standard deviation is a statistical quantity characterizing how the data's values are distributed around
their arithmetic mean value. Channels whose values don't fluctuate strongly naturally have low values for
standard deviation, whereas strongly fluctuating signals have relatively high standard deviations. The
algorithm for determining the deviation is as follows:
The deviation of each sample value within the reduction interval is squared and all the squares are
summed, divided by the number of values minus 1, and the square root of the result of this is taken.
Notes: The result clock pulse may not exceed the input channel's sampling rate.
Data types:
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