legend

Parameters

h

graphic handle on an Axes entity or vector of handles on polyline entities. The default value is the handle on current_axes.

string1,string2, ...

character strings stringi is the legend of the ith curve

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

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.

pos

(optional) specify where to draw the legend; this parameter may be a string (or equivalent but obsolete an integer). It can also be a vector [x,y] which gives the coordinates (in user units) of the upper left corner of the legend box.

In the first case the possible valuesare:

• 1 or "in_upper_right": the legend is drawn in the upper right-hand corner (default). This is the default value.

• 2 or "in_upper_left":the legend is drawn in the upper left-hand corner.

• 3 or "in_lower_left": the legend is drawn in the lower left-hand corner.

• 4 or "in_lower_right": the legend is drawn in the lower right-hand corner.

• 5 or "by_coordinates": interactive placement with the mouse .

• -1 or "out_upper_right": the legend is drawn at the right of the upper right-hand corner.

• -2 or "out_upper_left": the legend is drawn at the left of the upper left-hand corner.

• -3 or "out_lower_left": the legend is drawn at the left of the lower left-hand corner.

• -4 or "out_lower_right": the legend is drawn at the right of the lower right-hand corner.

• -5 or "upper_caption": the legend is drawn above the upper left-hand corner.

• -6 or "lower_caption": the legend is drawn below the lower left-hand corner.

boxed

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

hl

a handle, points to the Compound containing all the legend .

Description

Puts a legend on the current plot using the specified strings as labels. legend prepends labels by a recall of the corresponding line or patch. The recall type and properties are recovered from the given handles:

when called without handle argument (or with a handle on an axes entity) the function first build the vectors of handle on polylines entities which are the children of the given axes.

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

Examples

t=linspace(0,%pi,20);
a=gca();
a.data_bounds=[t(1) -1.8;t($) 1.8];

plot2d(t,[cos(t'),cos(2*t'),cos(3*t')],[-5,2 3]);
e=gce();
e1=e.children(1);
e1.thickness=2;
e1.polyline_style=4;
e1.arrow_size_factor = 1/2;
e.children(2).line_style=4;
e3=e.children(3);
e3.line_mode='on';
e3.mark_background=5;

hl=legend(['cos(t)';'cos(2*t)';'cos(3*t)']);

See also

• xstring — draw strings
• captions — draw graph captions
• polyline_properties — description of the Polyline entity properties