axis_properties

Description

The Axis entity is a leaf of the graphics entities hierarchy. This entity defines the parameters for axis scaling and appearance.

Axis properties

parent:

This property contains the handle of the parent. The parent of the axis entity should be of the type "Axes" or "Compound".

visible:

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

tics_direction:

Specify the direction of the tics drawn under the horizontal axis and the vertical axis. The possible values of this property are:

• "top". In this case, tics are drawn at the top of the horizontal axis.

• "bottom". In this case, tics are drawn at the bottom of the horizantal axis.

• "left". In this case, tics are going left on the vertical axis.

• "right". In this case, tics are going right on the vertical axis.

The defaults values are "top" for the horizontal axis and "right" for vertical axis.

xtics_coord:

This field represents the x-coordinate of the axis. It is a row vector containing values increasing from left to right which give tics positions for a horizontal axis. Other case, the entity is a vertical axis, this property contain a scale which defines the x-origin of the axis.

ytics_coord:

This field represents the y-coordinate of the axis. It is a row vector containing values increasing from bottom to top which give tics positions for a vertical axis. Other case, the entity is a horizontal axis, this property contain a scale which defines the y-origin of the axis.

tics_color:

The value of this properties is index of the color used to draw the axis'lines and tics.

tics_segment:

This field contains a flag which controls the display of the base segment of the axis. The default is "on", else if to not display it, the property takes "off" as value.

tics_style:

This property describes how the tics are given. It is a string flag which can have these possible values:

• "v". It's the default value, In this case, tics positions are given by the row factor xtics_coord for horizontal axis (ytics_coord for the vertical one).

• "r". In this case, tics positions are given by the vector [min,max,n] where n is the number of intervals.

• "i". In this case the vector given tics positions is of size 4, [k1,k2,a,n] then values are increasing between k1*10^a and k2*10^a, n is the number of intervals.

sub_tics:

This field sets the number of tics to draw between two main tics.

tics_labels:

This field is a string matrix, which contains the strings to be drawn along the axis at tics positions.

format_n:

This property is a character string which specifies the floating-point display format of the tics labels numbers, when relevant. It uses the format syntax of the C language printf function (for example "%.3f"). If equal to "", a default display format is used.

labels_font_color:

This property determines the color of the tics labels.

labels_font_size:

It is a scalar specifying the character size of tics labels. 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 specifies whether ticks labels are 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.

clip_state:

This field contains the clip_state property value for the arc. Clip_state value should be :

• "off" this means that the axis is not clipped

• "clipgrf" this means that the axis is clipped outside the Axes box.

• "on" this means that the axis is clipped outside the arc given by property clip_box.

clip_box:

This field is to determinate the clip_box property. By Default its value should be an empty matrix if clip_state is "off". Other cases the vector [x,y,w,h] (upper-left point width height) defines the portions of the axis to display, however clip_state property value will be changed.

user_data:

This field can be used to store any scilab variable in the axis data structure, and to retrieve it.

Examples

a=get("current_axes");//get the handle of the newly created axes
a.data_bounds=[-1,-1;10,10];

drawaxis(x=2:7,y=4,dir='u');
a1=a.children(1)
a1.xtics_coord=[1 4 5  8 10];
a1.tics_color=2;
a1.labels_font_size=3;
a1.tics_direction="bottom";
a1.tics_labels= [" February" "May"  "june" "August"  "October"];
  
drawaxis(x=1.2:1:10,y=5,dir='u',textcolor=13);
a2=get("hdl")
a2.sub_tics=0;
a2.tics_segment="off";
a2.ytics_coord=4;
  
drawaxis(x=-1,y=0:1:7,dir='r',fontsize=10,textcolor=5,ticscolor=6,sub_int=10)
a3=get("hdl");
a3.tics_labels= 'B'  +string(0:7);
a3.tics_direction="left";

See Also

• set — set a property value of a graphic entity object or of a User Interface object.
• get — Retrieve a property value from a graphics entity or an User Interface object.
• delete — delete a graphic entity and its children.
• drawaxis — draw an axis
• graphics_entities — description of the graphics entities data structures

Authors

Djalel ABDEMOUCHE