# Label entity properties

description of the Label entity properties

## Description

The Label entity is a child of an `Axes` entity. When an Axes entity is built, the Title and Labels handles come with it and are part of the Axes properties. Therefore, the properties of those sub-objects are editable via the Axes handle (see `gca` and `gda`). Also note that Label entities cannot be directly deleted. This entity defines the parameters for label drawing:

parent:

  This property contains the handle of the parent. The parent of the label entity should be of type `"Axes"` .

  Note that, for now, Label entity is exclusively used in `title`, `x_label`, `y_label` and `z_label` building.

visible:

  This field contains the `visible` property value for the entity . It should be `"on"` or `"off"` .By default, the label is visible, the value's property is `"on"`. If `"off"` the label is not displayed on the screen.

text:

  The matrix containing the strings of the object. The rows of the matrix are displayed horizontally and the columns vertically.

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

font_foreground:

  This field contains the color used to display the label `text`. Its value should be a color index (relative to the current colormap).

foreground:

  This field contains the color used to display the line around the box if any. Its value should be a color index (relative to the current colormap).

background:

  This field contains the color used to fill the box if any. Its value should be a color index (relative to the current colormap).

fill_mode:

  This field takes the values `"on"` or `"off"`. If `"on"` a box is draw around the text with a line on its edge and a background.

font_style:

  Specifies the font used to display the label. This is a positive integer referecing one of the loaded fonts. Its value must be between 0, referecing the first font, and the number of loaded fonts minus one, referencing the last font. For more information see graphics_fonts.

font_size:

  It is a scalar specifying the displayed characters size. If `fractional_font` property is `"off"` only the integer part of the value is used. For more information see graphics_fonts.

fractional_font:

  This property specify whether text is displayed using fractional font sizes. Its value must be either `"on"` or `"off"`. If `"on"` the floating point value of `font_size` is used for display and the font is anti-aliased. If `"off"` only the integer part is used and the font is not smoothed.

font_angle:

  This scalar allows you to turn the label. The font is turned clockise with the angle given in degrees. Note that changing the `font_angle` will automatically disable the `auto_rotation` property.

auto_rotation:

  If `"on"`, Scilab computes automatically the best angle to turn the label for the display. If `"off"`, the label can be manually turned with the `font_angle` property.

position:

  This 2d vector allows you to place manually the label on the screen. The position is stored in the data units of the axes. Note that changing the `font_angle` will automatically disable the `auto_position` property.

auto_position:

  If `"on"`, Scilab computes automatically the best position in the graphic window for the display. If `"off"`, the label can be manually places with the `position` property.

## Examples

    a=get("current_axes");
    a.title
    type(a.title)
    plot3d()
    a.x_label
    a.y_label
    a.z_label
    xtitle("My title","my x axis label", "Volume","Month")

    t=a.title;
    t.foreground=9;
    t.font_size=4;
    t.font_style=5;
    t.text="SCILAB";

    x_label=a.x_label;
    x_label.text=" Weight"
    x_label.font_style= 5;
    a.y_label.foreground = 12;

    // Starting with Scilab 5.2, it is now possible to write LaTeX or MathML:
    t.text="$\sqrt{SCILAB}$";
    x_label.font_size= 5;
    x_label.text="<mrow><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac><mo></mo><mfenced open=""{"" close=""}""> ..
    <mrow><mfrac><mrow><mfrac><mrow><mi>a</mi></mrow><mrow><mi>b</mi></mrow></mfrac></mrow><mrow><mfrac><mrow><mi>c</mi></mrow><mrow><mi>d</mi></mrow>..
    </mfrac></mrow></mfrac></mrow></mfenced></mrow>"

## See Also

- set
- get
- delete
- xtitle
- graphics_entities
- axes_properties
- text_properties