FreeMat
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Section: Handle-Based Graphics
There are several ways to use clim
to adjust the color limits of a plot. The various syntaxes are
clim clim([lo,hi]) clim('auto') clim('manual') clim('mode') clim(handle,...)
The first form (without arguments), returns a 2-vector containing the current limits. The second form sets the limits on the plot to [lo,hi]
. The third and fourth form set the mode for the limit to auto
and manual
respectively. In auto
mode, FreeMat chooses the range for the axis automatically. The clim('mode')
form returns the current mode for the axis (either 'auto'
or 'manual'
).
Switching to manual
mode does not change the limits, it simply allows you to modify them (and disables the automatic adjustment of the limits as more objects are added to the plot). Also, if you specify a set of limits explicitly, the mode is set to manual
Finally, you can specify the handle of an axis to manipulate instead of using the current one.
Here is an example of using clim
to change the effective window and level onto an image. First, the image with default limits
--> x = repmat(linspace(-1,1),[100,1]); y = x'; --> z = exp(-x.^2-y.^2); --> image(z); --> min(z(:)) ans = 0.1353 --> max(z(:)) ans = 0.9998
which results in
clim
function
--> image(z); --> clim([0,0.2]);
which results in