C-PLOT

Scientific Graphics and Data Analysis

9.6. - ze erase old plot



clears from the graphics filter any plot, or parts of a plot, that have been drawn using the commands that begin with z. If the graphics filter is associated with a video screen, the screen will be erased.
ze
If you have already drawn a filter plot or any of its elements using z, zz, zp, za or related commands (see Chapter 7), you can use ze to clear the memory of the old plot elements and begin fresh with a new plot. Although z and zz will automatically clear away old plot material before drawing a fresh plot, the other filter commands simply overwrite the existing material.