The annotation Option
Including Coordinate Values
arguments to a plotting command
an Array of annotations
Use the annotation option to add descriptive text that appears when the pointer hovers over a curve or a point.
plot(sin(x), x=0..2*Pi, annotation="a sine curve");
The annotation option allows you to add descriptive text to a 2-D curve or point plot. The term "point plot" in this context means a collection of points that are treated as a single plot element, such as that created by the plots:-pointplot or dataplot command. The text, which can include mathematical expressions, appears when the pointer hovers over the plot element to which it is associated.
In the first calling sequence, t can be any Maple expression that can be typeset. See the plot/typesetting help page for more information about how such expressions can be specified. In this case, t is displayed whenever the pointer hovers over any part of the curve or point plot.
In the second calling sequence, A is an Array of n values, where n is the number of points defining a curve or in a single point plot. This form of the option does not work with curves consisting of disconnected parts, such as those formed using the discont option or the plots:-implicitplot command.
You can include the x-coordinate or y-coordinate associated with the location over which the pointer hovers in an annotation. To do this, use the name xcoordinate or ycoordinate as the annotation value or within a typeset structure as described on the plot/typesetting help page.
If you want to use a function of either the x-coordinate or y-coordinate, then use xcoordinate(p) or ycoordinate(p) where p is a procedure that accepts a numeric value and returns a numeric value, such as u->u^2.
To use a function of both coordinates, use xycoordinate(p) where p is a procedure that accepts two numeric values (the x-coordinate and y-coordinate, respectively) and returns a numeric value, such as (u,v)->u*v.
The number of digits displayed for the x-coordinate or y-coordinate can be specified by adding the digits=n option after the procedure p. Note that p can be omitted, as in xcoordinate(digits=5).
Add an annotation to a curve.
plot⁡x2,x=0..1,annotation=typeset⁡the function ,x2
Add an annotation to each point in a data plot.
Include coordinate values.
plot⁡x2,x=0..1,annotation=typeset⁡the square of ,'xcoordinate', is ,'ycoordinate'
Use a function of the coordinate values and specify the number of digits.
plot⁡x2,x=0..1,annotation=typeset⁡the sum of x and y coordinates is ,'xycoordinate'⁡x,y→x+y,digits=5
The annotation option was introduced in Maple 2017.
For more information on Maple 2017 changes, see Updates in Maple 2017.
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