FreeMat
YLIM Adjust Y Axis limits of plot

Section: Handle-Based Graphics

Usage

There are several ways to use ylim to adjust the Y axis limits of a plot. The various syntaxes are

   ylim
   ylim([lo,hi])   
   ylim('auto')
   ylim('manual')
   ylim('mode')
   ylim(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 ylim('mode') form returns the current mode for the axis (either 'auto' or 'manual'). Finally, you can specify the handle of an axis to manipulate instead of using the current one.

As an additional feature, you can now specify inf for a limit, and FreeMat will take that limit from the automatic set. So, for example ylim([10,inf]) will set the minimum for the y axis, but use the automatic value for the maximum.

Example

--> x = linspace(-1,1);
--> y = sin(2*pi*x);
--> plot(x,y,'r-');
--> ylim  % what are the current limits?

ans = 
   -0.9999    0.9999 

which results in

ylim1.png
Next, we zoom in on the plot using the ylim function

--> plot(x,y,'r-')
--> ylim([-0.2,0.2])

which results in

ylim2.png
To demonstrate the infinite limits feature. Consider the following

--> plot(x,y,'r-');
--> ylim([0,inf])

which results in

ylim3.png