ntourf</a>    - Generate filled contours using patches, with specified colors.
    <a href="uvplot.html">uvplot</a>           - Plots the real and imaginary parts of a signal on the same axis.
 
  Figure tweaking
    <a href="jfig.html">jfig</a>       - Shorthand for tweaking figures.   
    <a href="dlines.html">dlines</a>     - Add diagonal lines to a plot.  
    <a href="hlines.html">hlines</a>     - Add horizontal lines to a plot.                                  
    <a href="vlines.html">vlines</a>   