annotationSetFont

Purpose

Sets the font properties of a plotAnnotation structure for controlling text boxes added to a graph.

Format

annotationSetFont(&myAnnotation, fontname, fontsize, fontcolor)
Parameters:
  • &myAnnotation (struct) – A plotAnnotation structure pointer.
  • fontname (string) – the name of the font.
  • fontsize (scalar) – the size of the font in points.
  • fontcolor (string) – a color or HTML hexidecimal color code.

Examples

Basic usage

/*
** Declare 'myAnnotation' to be an instance of a plotAnnotation
** structure and fill it in with default values
*/
struct plotAnnotation myAnnotation;
myAnnotation = annotationGetDefaults();

annotationSetFont(&myAnnotation, "arial", 14, "black");

Customized textbox

// Create a simple plot on which to add a textbox
x = seqa(pi, 0.1, 50);
plotXY(x, sin(x) + rndu(50, 1));

/*
** Declare instance of plotAnnotation structure
** and fill in with default values
*/
struct plotAnnotation myTextbox;
myTextbox = annotationGetDefaults();

// Set font to dark-gray, 14pt times
annotationSetFont(&myTextbox, "times", 14, "dark gray");

// Create text for textbox
box_text = "Trend change in Q2";

/*
** The top-left corner of the text box
** will start at the point (3.5,1.5)
*/
x_start = 3.5;
y_start = 1.5;

// Add textbox to last draw graph
plotAddTextbox(myTextbox, box_text, x_start, y_start);

Remarks

annotationSetFont() does not currently support surface plots.