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peter.cook
UK
356 Posts |
 Posted - 01/14/2003 : 06:35:02 AM
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HI,
I have often had problems with Origin using the data reader to capture certain points that can be seen on a graph - Origin just refuses. Previous Origin forum discussions and personal email suggest the problem is related to the search method employed. In my case, I have just found that I need to set the page.maxpts high enough to include missing values as well. I have an example dataset of 13440 rows where only the 1st 6 in every 84 rows contain data. setting page.maxpts to 10000 appears to display all points when scrolling through eg 1680 at a time, but I need to set page.maxpts to > 13440 to enable all visible points to be 'selected' - not just data reader.
Is this a bug / explanation for other users problems ?
How does setting page.maxpts reduce the data ?
Could this again be a search problem where the issue is a large number of missing data?
(Can send example opj file)
Cheers,
Pete
(Origin 6.1/7.0)
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Laurie
USA
404 Posts |
Posted - 01/14/2003 : 2:56:54 PM
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Hi Peter,
I've seen where missing values at the end of a dataset have caused problems for the data reader tool. I'm not sure that I understand what your dataset looks like. Do you have 6 rows of data and then 78 rows of missing values where this repeats for a total of 13440 rows of data.
Page.maxpts corresponds to the Speed Mode setting. Open Plot Details for the layer (Format:Layer) and on the Size/Speed tab you'll see the Speed Mode setting. You can uncheck the Worksheet Data, maximum pts per curve checkbox to plot all the data points.
To understand what points get plotted when you have speed mode on, let's look at a simple case. Open a new worksheet and fill the two columns with row number values, 1-30. Plot the data as a scatter plot. Set the 'Worksheet Data, maximum pts per curve' editbox to 10. The following data points get plotted:
(1,1), (4,4), (7,7), (10,10), (13,13), (16,16), (19,19), (22,22), (25,25), (28,28)
Hope this helps.
OriginLab Technical Support |
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cpyang
USA
1406 Posts |
Posted - 01/14/2003 : 6:57:18 PM
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Try going to Tools:Options and in Miscellaneous tab, increase the
Bisection Search Points
to 15000.
CP
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peter.cook
UK
356 Posts |
Posted - 01/17/2003 : 06:04:58 AM
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Hi Laurie, CP
Thanks for reply.
(Yes, the dataset is as described)
I missed the option of simply saving templates with the speed mode off!
What would be the best way to alter existing code such that no problems occur with old opj files eg
page.maxpts=100000 (v high value) - any downside?
or
page.rtMaxPts=1 ( I thought this would be the idea but it doesn't seem to do anything..?)
or something better!
In speedview mode, page.maxpts does need to iclude all the missing values - can't just lop off the end ones.
Likewise, just setting bisection search points to 15000 makes no difference ( in the case where speed view mode is on and page.maxpts isn't high enough ) but I gather this answes a different problem from previous forum.
Thanks again,
Cheers,
Pete
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Mike Buess
USA
3037 Posts |
Posted - 01/17/2003 : 07:34:00 AM
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Hi Pete,
You can turn speedmode off by setting page.maxpts=0.
Mike Buess
Origin WebRing Member |
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peter.cook
UK
356 Posts |
Posted - 01/20/2003 : 03:00:37 AM
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Thank Mike,
That will do nicely,
Cheers,
Pete
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Topic |
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Data Reader problems and page.maxpts