{smcl} {* 6may2004}{...} {hline} help for {hi:circhistogram} {hline} {title:Histogram for circular data with wrapping round of bins} {p 8 17 2} {cmdab:circhist:ogram} {it:varname} [{it:weight}] [{cmd:if} {it:exp}] [{cmd:in} {it:range}] [ {cmd:,} {cmdab:p:ad(}{it:#}{cmd:)} {it:histogram_options} ] {p 4 4 2} {cmd:fweight}s are allowed; see help {help weights}. {p 4 4 2}The abbreviation {cmd:circhist} (only) is allowed. {title:Description} {p 4 4 2} {cmd:circhistogram} produces a histogram for varname with some wrapping round of bins. {it:varname} should be a circular variable taking on values between 0 and 360 degrees. {title:Options} {p 4 8 2}{cmd:pad()} places a pad of {it:#} degrees at each end. Data less than or equal to {it:#} degrees are copied at the right end of the axis for a horizontal interval of 360 to {bind:360 + {it:#}} degrees. Data more than {bind:360 - {it:#}} degrees are copied at the left end of the axis for a horizontal interval of -{it:#} to 0 degrees. The default is 180, so that a full two cycles are shown. {p 4 8 2}{cmd:histogram_options} are any of the options allowed with {help histogram}, except that at present only the display of frequencies is supported. {title:Examples} {p 4 8 2}{cmd:. circhistogram wallasp, start(-180) width(30)} {p 4 8 2}{cmd:. circhistogram wallasp, pad(90) start(-90) width(30)} {title:Author} {p 4 4 2}Nicholas J. Cox, University of Durham, U.K.{break} n.j.cox@durham.ac.uk {title:Also see} {p 4 13 2} On-line: help for {help histogram}, {help circkdensity}