[] Plots a three dimensional surface plot within the environment set up by plw3d. The surface is defined by the two-dimensional array z[][], the point z[i][j] being the value of the function at (x[i], y[j]). Note that the points in arrays x and y do not need to be equally spaced, but must be stored in ascending order. The parameter opt controls the way in which the surface is displayed. For further details 3-d Plots.
[] x (PLFLT *, input):[]Pointer to set of x coordinate values at which the function is evaluated.
[] y (PLFLT *, input):[]Pointer to set of y coordinate values at which the function is evaluated.
[] z (PLFLT **, input):[]Pointer to a vectored two-dimensional array with set of function values.
[] nx (PLINT, input):[]Number of x values at which function is evaluated.
[] ny (PLINT, input):[]Number of y values at which function is evaluated.
[] opt (PLINT, input):[]Determines the way in which the surface is represented:
[] side (PLINT, input):[]Flag to indicate whether or not ``sides'' should be draw on the figure. If side=0 no sides are drawn, otherwise the sides are drawn.
[] mx (PLINT, input):[]Length of array in x direction, for plotting subarrays (Fortran only).
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