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PLSURF3DL(3plplot) | PLplot API | PLSURF3DL(3plplot) |

# NAME¶

**plsurf3dl**- Plot shaded 3-d surface plot for z[x][y] with y index limits

# SYNOPSIS¶

**plsurf3dl**(

*x*,

*y*,

*z*,

*nx*,

*ny*,

*opt*,

*clevel*,

*nlevel*,

*indexxmin*,

*indexxmax*,

*indexymin*,

*indexymax*)

# DESCRIPTION¶

This variant of**plsurf3d**(3plplot) (see that function's documentation for more details) should be suitable for the case where the area of the

*x*,

*y*coordinate grid where

*z*is defined can be non-rectangular. The limits of that grid are provided by the parameters

*indexxmin*,

*indexxmax*,

*indexymin*, and

*indexymax*.

Redacted form: **plsurf3dl(x, y, z, opt, clevel, indexxmin,
indexymin, indexymax) **

This function is used in example 8.

# ARGUMENTS¶

*x*(**PLFLT_VECTOR**(3plplot), input)- A vector containing the x coordinates at which the function is evaluated.
*y*(**PLFLT_VECTOR**(3plplot), input)- A vector containing the y coordinates at which the function is evaluated.
*z*(**PLFLT_MATRIX**(3plplot), input)- A matrix containing function values to plot. Should have dimensions of
*nx*by*ny*. *nx*(**PLINT**(3plplot), input)- Number of
*x*values at which function is evaluated. *ny*(**PLINT**(3plplot), input)- Number of
*y*values at which function is evaluated. *opt*(**PLINT**(3plplot), input)- Determines the way in which the surface is represented. To specify more
than one option just add the options, e.g. FACETED + SURF_CONT
*opt*=FACETED : Network of lines is drawn connecting points at which function is defined.*opt*=BASE_CONT : A contour plot is drawn at the base XY plane using parameters*nlevel*and*clevel*.*opt*=SURF_CONT : A contour plot is drawn at the surface plane using parameters*nlevel*and*clevel*.*opt*=DRAW_SIDES : draws a curtain between the base XY plane and the borders of the plotted function.*opt*=MAG_COLOR : the surface is colored according to the value of Z; if MAG_COLOR is not used, then the surface is colored according to the intensity of the reflected light in the surface from a light source whose position is set using**pllightsource**(3plplot). *clevel*(**PLFLT_VECTOR**(3plplot), input)- A vector containing the contour levels.
*nlevel*(**PLINT**(3plplot), input)- Number of elements in the clevel vector.
*indexxmin*(**PLINT**(3plplot), input)- The index value (which must be ≥ 0) that corresponds to the first
*x*index where*z*is defined. *indexxmax*(**PLINT**(3plplot), input)- The index value (which must be ≤
*nx*) which corresponds (by convention) to one more than the last*x*index value where*z*is defined. *indexymin*(**PLINT_VECTOR**(3plplot), input)- A vector containing the
*y*index values which all must be ≥ 0. These values are the first*y*index where*z*is defined for a particular*x*index in the range from*indexxmin*to*indexxmax - 1*. The dimension of*indexymin*is*indexxmax*. *indexymax*(**PLINT_VECTOR**(3plplot), input)- A vector containing the
*y*index values which all must be ≤*ny*. These values correspond (by convention) to one more than the last*y*index where*z*is defined for a particular*x*index in the range from*indexxmin*to*indexxmax - 1*. The dimension of*indexymax*is*indexxmax*.

# AUTHORS¶

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

PLplot documentation at http://plplot.org/documentation.php.June, 2021 |