assignfrom( workspace, variable )
    Reads a value from a specified workspace.

    Parameters
    ----------
    workspace: string
        Workspace name.

    variable: string|symbol
        Variable name.

    Examples
    --------
    > workspace( 'foobar' );
    > var x = 3.14;
    > workspace( 'barfoo' );
    > var y = assignfrom( 'foobar', 'x' );
    > y

    See Also
    --------
    assignin, varsWorkspace, workspace, workspaces