stddev

Contents: Description, Arguments, Usage, Examples, Related Functions Supported Under Version: >1.69 Current Davinci Version: 2.27 64-bit Safe: No Description Compute standard deviation along specified axis Arguments and Return Values Arguments: A numeric array Return Value: A float number or a structure Usage Syntax: stddev(object = VAL, axis = [x][y][z] [, both = 1] [, ignore = VAL]) The stddev() function computes the standard deviation along one or more axis. If no axis is specified, then the standard deviation is computed along all three. stddev() returns a FLOAT. If an ignore value is specified, then any element that is equal to the ignore value is not included in the computation. If all the values in the computation are equal to the ignore value, then the output is set to the ignore value. If the both flag is set (both=1), then stddev returns a structure containing the both the average and stddev. Note: The stddev function uses a one-pass accumulator that can experience round off error with lots of numbers. Examples dv> a 100x100x1 array of float, bsq format [40,000 bytes] dv> stddev(a,axis=xy) 0.290361

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