octave: Data Sources in Object Groups
15.4.6.1 Data Sources in Object Groups
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All of the group objects contain data source parameters. There are
string parameters that contain an expression that is evaluated to update
the relevant data property of the group when the ‘refreshdata’ function
is called.
-- : refreshdata ()
-- : refreshdata (H)
-- : refreshdata (H, WORKSPACE)
Evaluate any ‘datasource’ properties of the current figure and
update the plot if the corresponding data has changed.
If the first argument H is a list of graphic handles, then operate
on these objects rather than the current figure returned by ‘gcf’.
The optional second argument WORKSPACE can take the following
values:
"base"
Evaluate the datasource properties in the base workspace.
(default).
"caller"
Evaluate the datasource properties in the workspace of the
function that called ‘refreshdata’.
An example of the use of ‘refreshdata’ is:
x = 0:0.1:10;
y = sin (x);
plot (x, y, "ydatasource", "y");
for i = 1 : 100
pause (0.1);
y = sin (x + 0.1*i);
refreshdata ();
endfor