legends

Arguments

strings

n vector of strings, strings(i) is the legend of the ith curve

Starting from Scilab 5.2, it is possible to write LaTeX or MathML expression.

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_args>

This represents a sequence of statements key1=value1,key2=value2,... where key1, key2,... can be one of the following:

opt

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).

6 or "below"

the legends are drawn under the graph (which is resized accordingly).

with_box

a boolean (default value %t) which sets ot not the drawing of the box.

font_size

an integer (default value 1) which sets the size of the font used for the names in the legend.

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

// 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 )

See Also

• plot2d — 2D plot
• xstring — draw strings
• xtitle — add titles on a graphics window
• legend — draw graph legend