Graph histograms of ladder of powers
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	^gladder^ varname [^if^ exp] [^in^ range] [^, b^in^(^#^)^ ^graph^_options]

displays nine histograms of transforms of varname according to the ladder
of powers (see help ladder).  

If ^bin()^ is not specified, the default is set according to the suggestion in 
STB-gr1.   The calculation is made in terms of the number of unique values 
of varname, and sqrt(n) is used in preference to 10*log(n)/log(n) if the
former is smaller.