estimator.nd.sigmaf

estimator.nd.sigmaf(stddev)

Standard deviation → Gaussian width parameter σ.

Parameters:

stddev – standard deviation

EXAMPLE:

>>> from estimator.nd import stddevf, sigmaf
>>> n = 64.0
>>> sigmaf(stddevf(n))
64.000...

>>> sigmaf(RealField(128)(1.0))
2.5066282746310005024157652848110452530
>>> sigmaf(1.0)
2.506628274631...
>>> sigmaf(1)
2.506628274631...