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VBA chart-drawing excel macro CPU/Memory optimization

Posted on 2004-04-27
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Last Modified: 2010-05-18
Hi,

I'm not sure if this is the right place to ask...But here it is.

I have 200 columns and 40 rows long sheet in Excel and I have coded a Macro to plot charts of every column agains every other (to understand correlation between the data).

Now the problem is that while plotting, with ScreenUpdate=False, my CPU utilization shoots up to 100% ...plotting hundreds of those charts in new sheets (one per column under consideration)! ....and it takes FOREVER..to finish it........

Please let me know if you know of a trick or optimization to reduce my CPU and MEMORY utilization for such a macro!

Thanks (hope I explained it well!)
~essjthakkar
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Question by:essjthakkar
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5 Comments
 
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by:LunaSkye
ID: 10934647
Hi,
Im not exactly sure if i understand it,  but alot of times, if you have stuff visible it takes longeer just becuase of the refreshes.  Try makking each chart     .visible = false  until you have filled it, then turn it visible.

Also, maybe if you throw a "DoEvents" statement in the loop.  That way, after each iteration, you give the computer a chance to process other events on the system.

-Andrew
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Author Comment

by:essjthakkar
ID: 10954861
Ok, about the Visible=false idea, is this possible ?  (algorithmic steps...)

repeat:
    create chart object
    Set the chart to visible=false,
    Populate the chart :  get chart data, set the title, etc.
    Set the chart to visible=true now, since its ready.
go to "repeat" for another chart

I tried setting Visible=false before actually populating the chart, but apparently, it gave me an Error!  IS IT NOT possible to set a chart to invisible and THEN populate it?

:S
~Siddharth
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