plpoin: Plot a glyph at the specified points
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plpoin: Plot a glyph at the specified points

plpoin ( n ,
  x ,
  y ,
  code );
 

Plot a glyph at the specified points. (This function is largely superseded by plstring which gives access to many[!] more glyphs.) code=-1 means try to just draw a point. Right now it's just a move and a draw at the same place. Not ideal, since a sufficiently intelligent output device may optimize it away, or there may be faster ways of doing it. This is OK for now, though, and offers a 4X speedup over drawing a Hershey font "point" (which is actually diamond shaped and therefore takes 4 strokes to draw). If 0 < code < 32, then a useful (but small subset) of Hershey symbols is plotted. If 32 <= code <= 127 the corresponding printable ASCII character is plotted.

n (PLINT, input)

Number of points in the x and y vectors.

x (PLFLT_VECTOR, input)

A vector containing the x coordinates of points.

y (PLFLT_VECTOR, input)

A vector containing the y coordinates of points.

code (PLINT, input)

Hershey symbol code (in "ascii-indexed" form with -1 <= code <= 127) corresponding to a glyph to be plotted at each of the n points.

Redacted form: plpoin(x, y, code)

This function is used in examples 1, 6, 14, and 29.

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plpath: Draw a line between two points, accounting for coordinate transforms  Home  plpoin3: Plot a glyph at the specified 3D points