Updating Graphs

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Hi

I would like to create a graph inside an existing window which was created as follows:
DoWindow/F Window1  <br />
Execute "Window1()"

where
Window Window1() : Panel<br />
NewPanel /W=(230,53,881,791) as "Window1 Title"<br />
...<br />
Display/N=graph/HOST=#/W=(30,377,629,723)<br />
EndMacro<br />

If I understand correctly, this creates a graph inside the panel 'window1' (the currently active window) with name 'graph'.
I am then trying to append traces to this graph from another function via
AppendToGraph/W=graph wave1 vs wave2<br />

which throws the following error

While executing ApendToGraph the following error occured: there are no graphs or the specified graph does not exist.

If I change the AppendToGraph to the following line
AppendToGraph/W=# wave1 vs wave2<br />

everything works fine. However, on repeated execution of the function, the graph does not update? Also is there a way to empty the graph (i.e. to remove all appended traces?).
Any help is much appreciated :).

Thanks,
lin
Hello Lin,

Even if it's working, have you also tried this ? :
AppendToGraph/W=Window1#graph wave1 vs wave2 //see SubWindow syntax


Sometimes, the SetActiveSubWindow instruction may be useful too.

Regarding the other stuff, I think your problem is that you always append the traces, even if they have already been appended.
I would suggest to define a boolean variable to know if the trace was already plotted or not.
variable /G bool_Plotted = root:bool_Plotted

If (bool_Plotted == 0)
    AppendToGraph/W=Window1#graph wave1 vs wave2
    bool_Plotted  = 1
Else
    Print "Trace already plotted"
Endif

So that, no need to explicitely update anything.

Best Regards

September 16, 2011 at 06:31 am - Permalink

Rather than using a global to keep track of what has been plotted, use the CheckDisplayed operation to check if the wave is already displayed in the graph.

September 16, 2011 at 07:46 am - Permalink

Another little tip you might find useful is that operations that create windows (like Display and Newpanel) when run in a function create a string variable called S_name that contains the name of the created window or subwindow. Here's a trivial example function that collects a full path to a subwindow:
function test()

    NewPanel
    String fullpath = S_name
    Display/HOST=$fullpath
    fullPath += "#"+S_name
    print fullPath
end
You could use the string fullPath later to refer to your graph window. In code, it's generally a good idea to explicitly name windows, rather than depending on the active window. So instead of writing AppendToGraph, write something like
AppendToGraph/W=$fullPath ...

John Weeks
WaveMetrics, Inc.
support@wavemetrics.com

September 16, 2011 at 11:56 am - Permalink