legends — draw graph legend
legends(strings,style,<opt_args>)
n vector of strings, strings(i) is the legend of the ith curve
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).
This represents a sequence of statements
key1=value1,key2=value2
,... where key1
,
key2,...
can be one of the following:
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:
the legends are drawn in the upper right-hand corner.
the legends are drawn in the upper left-hand corner.
the legends are drawn in the lower left-hand corner.
the legends are drawn in the lower right-hand corner.
interactive placement with the mouse (default).
the legends are drawn under the graph (which is resized accordingly).
a boolean (default value %t) which sets ot not the drawing of the box.
an integer (default value 1) which sets the size of the font used for the names in the legend.
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.
// Example 1 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") scf() ; 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="?") // Example 2 scf() ; subplot(221) 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=3 ) subplot(222) 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=6 ) subplot(223) 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=1, font_size=2 ) subplot(224) 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=2, font_size=1 )