1PLSURF3DL(3plplot)                PLplot API                PLSURF3DL(3plplot)
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NAME

6       plsurf3dl  - Plot shaded 3-d surface plot for z[x][y] with y index lim‐
7       its
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SYNOPSIS

10       plsurf3dl(x, y, z, nx, ny, opt, clevel, nlevel,  indexxmin,  indexxmax,
11       indexymin, indexymax)
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DESCRIPTION

14       This  variant  of  plsurf3d(3plplot) (see that function's documentation
15       for more details) should be suitable for the case where the area of the
16       x,  y  coordinate  grid where z is defined can be non-rectangular.  The
17       limits of that grid are  provided  by  the  parameters  indexxmin,  in‐
18       dexxmax, indexymin, and indexymax.
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20       Redacted  form:  plsurf3dl(x,  y, z, opt, clevel, indexxmin, indexymin,
21       indexymax)
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23       This function is used in example 8.
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ARGUMENTS

26       x (PLFLT_VECTOR(3plplot), input)
27              A vector containing the x coordinates at which the  function  is
28              evaluated.
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30       y (PLFLT_VECTOR(3plplot), input)
31              A  vector  containing the y coordinates at which the function is
32              evaluated.
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34       z (PLFLT_MATRIX(3plplot), input)
35              A matrix containing function values to plot.  Should have dimen‐
36              sions of nx by ny.
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38       nx (PLINT(3plplot), input)
39              Number of x values at which function is evaluated.
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41       ny (PLINT(3plplot), input)
42              Number of y values at which function is evaluated.
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44       opt (PLINT(3plplot), input)
45              Determines the way in which the surface is represented. To spec‐
46              ify more than one option just add the options,  e.g.  FACETED  +
47              SURF_CONT  opt=FACETED  :  Network  of lines is drawn connecting
48              points at which function is defined.  opt=BASE_CONT : A  contour
49              plot  is  drawn at the base XY plane using parameters nlevel and
50              clevel.  opt=SURF_CONT : A contour plot is drawn at the  surface
51              plane  using  parameters  nlevel  and  clevel.  opt=DRAW_SIDES :
52              draws a curtain between the base XY plane and the borders of the
53              plotted  function.   opt=MAG_COLOR  : the surface is colored ac‐
54              cording to the value of Z; if MAG_COLOR is not  used,  then  the
55              surface  is  colored according to the intensity of the reflected
56              light in the surface from a light source whose position  is  set
57              using pllightsource(3plplot).
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60       clevel (PLFLT_VECTOR(3plplot), input)
61              A vector containing the contour levels.
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63       nlevel (PLINT(3plplot), input)
64              Number of elements in the clevel vector.
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66       indexxmin (PLINT(3plplot), input)
67              The  index  value  (which  must  be ≥ 0) that corresponds to the
68              first x index where z is defined.
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70       indexxmax (PLINT(3plplot), input)
71              The index value (which must be ≤ nx) which corresponds (by  con‐
72              vention)  to one more than the last x index value where z is de‐
73              fined.
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75       indexymin (PLINT_VECTOR(3plplot), input)
76              A vector containing the y index values which all must  be  ≥  0.
77              These values are the first y index where z is defined for a par‐
78              ticular x index in the range from indexxmin to  indexxmax  -  1.
79              The dimension of indexymin is indexxmax.
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81       indexymax (PLINT_VECTOR(3plplot), input)
82              A  vector  containing the y index values which all must be ≤ ny.
83              These values correspond (by convention) to  one  more  than  the
84              last  y index where z is defined for a particular x index in the
85              range from indexxmin to indexxmax - 1.  The dimension of indexy‐
86              max is indexxmax.
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AUTHORS

90       Many  developers  (who  are  credited at http://plplot.org/credits.php)
91       have contributed to PLplot over its long history.
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SEE ALSO

94       PLplot documentation at http://plplot.org/documentation.php.
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98                                 January, 2023              PLSURF3DL(3plplot)
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