Scilab Data type
Last update : 16/10/2006

segs_properties - description of the Segments entity properties

### Description

The Segs entity is a leaf of the graphics entities hierarchy. This entity defines the parameters for a set of colored segments or colored arrows.

  parent: This property contains the handle of the parent. The parent of the segment entity should be of the type `"Axes"` or `"Compound"`.
  children: This property contains a vector with the `children` of the handle. However, `segs` handles currently do not have any `children`.
  visible: This field contains the `visible` property value for the entity . It should be `"on"` or `"off"` . By default, the segments are visibles, the value's property is `"on"`. If `"off"` the segments are not drawn on the screen.
  data: This field is two column matrix `[x,y,[z]]` which gives the coordinates of the segments boundary. If `xv=matrix(x,2,-1)` and `yv=matrix(y,2,-1)` then `xv(:,k)` and `yv(:,k)` are the boundary coordinates of the segment numbered `k`.
  line_mode: This field contains the default `line_mode` property value for the segs. Its value should be `"on"` (line drawn) or `"off"` (no line drawn).
  line_style: The `line_style` property value should be an integer in [0 6]. 0 stands for solid the other value stands for a selection of dashes. This property applies to all segments.
  thickness: This field contains the `thickness` property for all segments. Its value should be a non negative integer..
  arrow_size: Factor that specify the size of a arrowheads. With a negative value, the size is also dependent of the arrows length. TO draw segment, the value must be set to 0.
  segs_color: This field contains the vector of colors to use to draw each segment. Each element is a color index relative to the current colormap.
  mark_mode: This field contains the default `mark_mode` property value for the polyline. Its value should be `"on"` (marks drawn) or `"off"` (no marks drawn).
  mark_style: The `mark_style` property value is used to select the type of mark to use when `mark_mode` property is `"on"`. The value should be an integer in [0 14] which stands for: dot, plus, cross, star, filled diamond, diamond, triangle up, triangle down, diamond plus, circle, asterisk, square, triangle right, triangle left and pentagram.
  mark_size_unit: This field contains the default `mark_size_unit` property value. If `mark_size_unit` is set to `"point"`, then the `mark_size` value is directly given in points. When `mark_size_unit` is set to `"tabulated"`, `mark_size` is computed relative to the font size array: therefore, its value should be an integer in [0 5] which stands for 8pt, 10pt, 12pt, 14pt, 18pt and 24pt. Note that `plot2d` and pure scilab functions use `tabulated` mode as default ; when using `plot` function, the `point` mode is automatically enabled.
  mark_size: The `mark_size` property is used to select the type of size of the marks when `mark_mode` property is `"on"`. Its value should be an integer between 0 and 5 whith stands for 8pt, 10pt, 12pt, 14pt, 18pt and 24pt.
  mark_foreground: This field contains the `mark_foreground` property value which is the marks' edge color. Its value should be a color index (relative to the current color_map).
  mark_background: This field contains the `mark_background` property value which is the marks' face color. Its value should be a color index (relative to the current color_map).
  clip_state: This field contains the `clip_state` property value for the segments. It should be :
    `"off"` this means that the segments is not clipped.
    `"clipgrf"` this means that the segments is clipped outside the Axes box.
    `"on"` this means that the segments is clipped outside the rectangle given by the property `clip_box`.
  clip_box: This field contains the `clip_box` property. By default segment are not clipped, clip_state is "off", so the value should be an empty matrix .Other cases the vector `[x,y,w,h]` (upper-left point width height) defines the portions of the segments to display, however `clip_state` property value will be changed.
  user_data: This field can be use to store any scilab variable in the segs data structure, and to retreive it.

### Examples

      set("figure_style","new") //create a figure
       a=get("current_axes");//get the handle of the newly created axes
       a.data_bounds=[-10,-10;10,10];
       x=2*%pi*(0:7)/8;
       xv=[2*sin(x);9*sin(x)];
       yv=[2*cos(x);9*cos(x)];
       xsegs(xv,yv,1:8)

       s=a.children
       s.arrow_size=1;
        s.segs_color=15:22;
        for j=1:2
          for i=1:8
            h=s.data(i*2,j);
            s.data(i*2,j)=s.data(i*2-1,j);
            s.data(i*2-1,j)=  h;
           end
        end

       s.segs_color=5; //set all the colors to 5

       s.clip_box=[-4,4,8,8];
       a.thickness=4;
       xrect(s.clip_box);

### See Also

`set`, `get`, `delete`, `xsegs`, `graphics_entities`,

### Author

Djalel ABDMOUCHE