void Plot4d (x, fy, z, v, npts, vmax, sym) D4PLT.C Level 2
 
float *x, *y, *z  Arrays of dimension npts that specify the coordinates of each volume value.
float *v Array of volume values (dimension npts) that are to be plotted at each corresponding x, y, z point.
int npts The number of points to be plotted.
float vmax The maximum volume value to be expected. A point plotted with this value of volume will result in a rectangular volume that is 1/10 the size of each axis. If you wish to start a second 4-D plot, you should call Plot4d() with vmax = 0.0f to renormalize the internal scaling factors.
float *v Array of volume values (dimension npts) that are to be plotted at each corresponding x, y, z point.
int sym The symbol  to be plotted in the center of each volume. If sym == -1, the symbol is suppressed.
 
Plot4D() plots an array of values (as individual volumes) at the specified positions. All points are plotted with the presently active color.