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help for ^circdplt^
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Raw data plot for circular data with point symbols
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    ^circdplt^ varname [^if^ exp] [^in^ range]
    [ ^,^ ^r^ound^(^#^)^ ^s^ymbol^(^str^)^ ^si^ze^(^#^)^ ^f^udge^(^#^)^
    ^ct cl non^orth ^ahl(^#^)^ ^uti^tle^(^string^)^ ^lti^tle^(^string^)^
    ^sa^ving^(^filename^)^ ]

Description
-----------

^circdplt^ produces a raw data plot for varname with point symbols.
varname should be a circular variable taking on values between 0 and 360
degrees.

Strictly, the values of varname are rounded to the nearest 5 degrees, or
to the argument of ^round^. Point symbols are plotted outwards from the
circumference of a circle in each direction present in the data. The
mean direction is indicated by an arrow from the centre of the circle
with length the radius of the circle times the vector strength. Hence an
arrow representing a mean direction with vector strength 1 would touch
the circle. An arrow outside the circle indicates North (unless
^nonorth^ is specified).

The graph should be printed with vertical magnification 108%.

Options
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^round(^#^)^ indicates the bin or class width to be used (default 5 deg).

^symbol(^str^)^ indicates the point symbol to be used:
    .   dot
    O   large circle (default)
    S   square
    T   triangle
    o   small circle
    d   diamond
    p   plus

^size(^#^)^ indicates the size of point symbol to be used. Default 275.

^fudge(^#^)^ is a fudge factor controlling the radial spacing of point
    symbols. Default 1 means that the outermost point symbol will be
    plotted at distance from the circle equal to the radius of that
    circle. # means maximum distance # times that radius. Values greater
    than 1 are risky: point symbols may overplot other stuff or fall
    outside the plotting region.

^ct^ places ticks inside the circle at the cardinal points N, E, W and S.

^cl^ places letters inside the circle indicating N, E, W and S.

^nonorth^ removes the arrow indicating N.

^ahl(^#^)^ specifies the arrowhead length on the arrow indicating the
    mean direction. Default 400.

^utitle(^string^)^ defines an upper title.

^ltitle(^string^)^ defines a lower title. The default indicates the mean
    direction and vector strength. A single period ^.^ will have the
    effect of blanking out this default.

^saving(^filename^)^ saves the graph in filename.


Example
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        . ^circdplt wallasp, uti("Lake District cirques wall aspect")^
          ^r(2) si(100)^


Author
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         Nicholas J. Cox, University of Durham, U.K.
         n.j.cox@@durham.ac.uk


Also see
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On-line: help for @circrplt@, @circvplt@, @circsumm@