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abrax
Germany
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 Posted - 12/18/2003 : 11:21:28 AM
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Hi forum,
excuse me for such a long request. I will give a summary of the problem first, and then some more details for those, who would like to reproduce my problem.
Problem:
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I refer to Origin 6.0 and 6.1. I have got an image matrix with a resolution of 64x64 dots to be plotted as a contour plot. Each time I try the contour plot, I get a diagram with an axis range of (1..10) x (1..10) units (s. below for steps to this diagram). So the original resolution information of the image matrix are not obvious at the diagram scale.
Even worse, if I rescaled the diagram axis by a factor 10/64 (s. below: will restore original resolution 64x64 to scale), the grapics ended at 64 correctly, but started only at 6.4.
Here's the question:
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How can I create a contour plot with the correct scale axis range (i.e. 1..64 x 1..64) and without any such distortions.
Best regards & thanks in advance
A.Krause
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How I created the contour plot:
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I think it should work like this with a squared matrix of any size, just fill it with any positive values and adopt the scale values afterwards...
my Source: 64x64 matrix object
select in menu: Plot3D -> Contour-Colour Fill
both scales should now have the range 1..10
How I rescaled the contour plot:
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Right klick on the Y-axis, choose: Properties
select tab "Tick Labels"
for left- and bottom-axis do
set "Divide By Factor"=0.15625
(= 10/64)
press "Apply"-button
select tab "Scale"
for horizontal- and vertical-axis do
set "From" = 1
"To" =64
"Increment"= 8
press "OK"-button
Now you should have the correct resolution showing at the axis, but the graphics will start only at 6.4 while between 1..6.4 should be a white area now. That is why the former starting point (=1) has also been rescaled by factor 6.4. I think some kind of scale offset could help here, but I could not find such option...
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cpyang
USA
1406 Posts |
Posted - 12/18/2003 : 12:40:39 PM
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You can go back to the matrix and choose
Matrix::Set Dimensions
and keep the Rows and Columns unchanged, but set First and last X value to 1 and 64, same for Ys.
Then remake the contour plots.
CP
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abrax
Germany
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Posted - 12/18/2003 : 5:04:17 PM
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big problem, short solution... :o)
I will check out your solution when I'm back at work next year. Thank you very much for your effort and the quick answer.
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abrax
Germany
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Posted - 01/14/2004 : 04:40:20 AM
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It works (of course)! :o)
Thanks very much again. |
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Matrices and Plot3D -> Contour plot