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# captions

draw graph captions

### Syntax

hl=captions(h, strings [,location])

### Arguments

- h
vector of handles on polyline entities.

- strings
n vector of strings, strings(i) is the caption of the ith polyline

- hl
a handle of type "

`Legend`

", points to the structure containing all the captions information (see legend_properties.

- location
a character string with possible values:

`"in_upper_right"`

: captions are drawn in the upper right corner of the axes box.`"in_upper_left"`

: captions are drawn in the upper left corner of the axes box.`"in_lower_right"`

: captions are drawn in the lower right corner of the axes box.`"in_lower_left"`

: captions are drawn in the lower left corner of the axes box.`"out_upper_right"`

: captions are drawn at the right of the upper right corner of the axes box.`"out_upper_left"`

: captions are drawn at the left of the upper left corner of the axes box.`"out_lower_right"`

: captions are drawn at the right of the lower right corner of the axes box.`"out_lower_left"`

: captions are drawn at the left of the lower left corner of the axes box.`"upper_caption"`

: captions are drawn above the upper left corner of the axes box.`"lower_caption"`

: captions are drawn below the lower left corner of the axes box. This option correspond to the`leg`

argument of plot2d`"by_coordinates"`

: the upper left corner of the captions box is given by the "position" field of the associated data structure. The`x`

and`y`

positions are given as fractions of the`axes_bounds sizes.`

### Description

Puts captions on the current plot at the in the bottom left corner
of the graphic window using the specified strings as labels.
`captions`

prepends labels by a recall of the
corresponding polylines. The type and properties are recovered from the
given handles:

The `captions`

function creates a Legend data structure.

There is at most one `Legend`

associated with each
axes. If the caption function is recalled while a
`Legend`

still exist the old one is replaced.

### Examples

t=0:0.1:2*%pi; a=gca();a.data_bounds=[t(1) -1.8;t($) 1.8]; a.margins(4)=0.2; plot2d(t,[cos(t'),cos(2*t'),cos(3*t')],[1,2 3]); e=gce(); e.children(1).thickness=3; e.children(2).line_style=4; hl=captions(e.children,['cos(t)';'cos(2*t)';'cos(3*t)']); hl=captions(e.children,['cos(t)';'cos(2*t)';'cos(3*t)'],'in_upper_right'); hl.legend_location='in_upper_right' hl.fill_mode='on';

### See also

- plot2d — 2D plot
- legend — draw graph legend
- polyline_properties — description of the Polyline entity properties
- legend_properties — description of the Legend entity properties.

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