B q\7 @sJdZddlZddlmZddlmZdddd d d d d dddg Zd*ddZd+ddZ GdddeedZ Gddde Z Gddde Z Gdd d e Z Gdd d e ZGddde ZGdd d e ZGdd d e ZGd d!d!e ZGd"d d e ZGd#dde ZGd$dde ZGd%d&d&e ZGd'dde ZGd(d)d)e ZdS),z Classes that deal with stretching, i.e. mapping a range of [0:1] values onto another set of [0:1] values with a transformation N)InheritDocstrings) BaseTransform BaseStretch LinearStretch SqrtStretch PowerStretchPowerDistStretchSquaredStretch LogStretch AsinhStretch SinhStretch HistEqStretchContrastBiasStretchcCsH|dkrt|t|Stj||dtj|t||d|SdS)zCalculate the log base n of x.N)out)nplog true_divide)nxrrs.    "#$!!$ &-