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##### 15.2.8.1 Data sources in object groups

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.

— Function File: refreshdata ()
— Function File: refreshdata (h)
— Function File: refreshdata (h, workspace)

> Evaluate any ‘`datasource`’ properties of the current figure and update the plot if the corresponding data has changed. If called with one or more arguments h is a scalar or array of figure handles to refresh. 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