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Dumb Question: Window Coordinates?

 
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Bob Askin



Joined: 05 Mar 2004
Posts: 2
Location: Ladysmith, British Columbia

PostPosted: Fri Mar 05, 2004 1:19 pm    Post subject: Dumb Question: Window Coordinates? Reply with quote

I am working with DPlot V. 1.9.3.1 on producing a 2D, x-y plot from a hydrologic frequency analysis I am working on. The data has been entered from the results of a lognormal frequency curve (flow discharge vs. recurrence interval). In addition, the input data from the analysis has been entered in order to graphically show the "fit" between the probability distribution & the data.

My dumb question is associated with changing the x-y scaling from linear to logarithmic. As a new user (in the last month), I have not encountered this error before. That is, when I go via the Options pull-down menu to change from linear x - linear y scaling (option A) as initially shown, to logarthmic x - logarithmic y (option E), the following DPlot warning message occurs:
"Manually entered Windows Coordinates are not consistent with logarithmic scaling". I hit the provided OK button and no change occurs.

I am not sure on how to interpret this message or error? For interest I tried changing the scaling on the other options provided, but I encountered the same message & result. I also checked through the Help contents and have found nothing on this issue.

Does this imply that I have made an error/blunder and my data and/or file is corrupted?? Please confirm.

In advance, I thank you for your feedback & help in this matter.

Regards,

RWA.
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DPlotAdmin
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Joined: 24 Jun 2003
Posts: 2310
Location: Vicksburg, Mississippi

PostPosted: Fri Mar 05, 2004 2:29 pm    Post subject: Reply with quote

Bob,
First, there are no dumb questions. There are definitely dumb error messages, though Wink

Quote:
"Manually entered Windows Coordinates are not consistent with logarithmic scaling". I hit the provided OK button and no change occurs.


Take a look at Options>Extents/Tick Marks/Size. You've checked "Specify Extents", and one or more of the extents entered there is 0 or negative. You can either uncheck the box (probably wisest) or set the extents to values that make sense on a log scale. The trouble with doing the latter is that DPlot may reset those extents to 0 (or something else) in order to make the extents a multiple of the tick mark interval. Easiest just to uncheck the box, change to a log scale, then go back and set extents again if you need to.

Let me know if this doesn't answer your question.
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