legends - draw graph legend

Calling Sequence

legends(strings,style [,opt, with_box])

Parameters

• strings : n vector of strings, strings(i) is the legend of the ith curve
• style : integer row vector of size n (the plot styles, third parameter of plot2d) or an integer 2 x n matrix, style(1,k) contains the plot style for the kth curve and style(2,k) contains the line style (if style(1,k)>0) or mark color (if style(1,k)<0).
• opt : (optional) specify where to draw the legends; this parameter may be a integer flag (or equivalently a string flag) or a vector [x,y] which gives the coordinates of the upper left corner of the legend box. In the first case the possible values are:
  • 1 or "ur" the legends are drawn in the upper right-hand corner.
  • 2 or "ul" the legends are drawn in the upper left-hand corner.
  • 3 or "ll" the legends are drawn in the lower left-hand corner.
  • 4 or "lr" the legends are drawn in the lower right-hand corner.
  • 5 or "?" interactive placement with the mouse (default).
• with_box : a boolean (default value %t) which sets ot not the drawing of the box.

Description

Puts a legend on the current plot using the specified strings as labels.

In the interactive placement (opt=5 or opt="?") move the legend box with the mouse and press the left button to release it.

This function allows more flexible placement of the legends than the leg plot2d argument.

Examples

t=0:0.1:2*%pi;
plot2d(t,[cos(t'),cos(2*t'),cos(3*t')],[-1,2 3]);  
legends(['cos(t)';'cos(2*t)';'cos(3*t)'],[-1,2 3],opt="lr")
xset("line style",2);plot2d(t,cos(t),style=5);
xset("line style",4);plot2d(t,sin(t),style=3);
legends(["sin(t)";"cos(t)"],[[5;2],[3;4]], with_box=%f, opt="?")
 
  

See Also

plot2d ,   xstring ,   xtitle ,