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 data binning and graphical view		  New Topic  Reply to Topic
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sm_astro

UK
Posts
Posted - 10/17/2007 :  12:32:26 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Version (Select Help-->About Origin):
Operating System: Windows ME 2000

I've data in the form:
x y
0.1 0.22
0.2 0.34
0.3 0.56
0.3 0.66
0.4 0.78
0.42 0.4
0.5 0.5
0.53 0.55
0.32 0.45
0.45 0.78

I'd like to bin in y in x and see the correlation, if any, graphically. I'm able to convert datasheet into a matrix using 2-d binning by selecting y, but how can i plot the binned data.

easwar

USA
1964 Posts
Posted - 10/17/2007 :  4:56:59 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Once you bin to worksheet, you can make an Image Plot from the Plot menu with the matrix active. This basically plots each cell as a pixel/raster graph so one can visually see if there is correlation.

You may want to try version 8, which is available for demo download now. This version has a Scatter Matrix plot that can draw confidence ellipse and report R^2 value for linear fit, for every pair of column in a worksheet. That does not bin the data, but it can perhaps convey information on correlation that you are looking for. Version 8 also has other correlation tools.

You can download demo from:
http://originlab.com/index.aspx?s=12&lm=62

Easwar
OriginLab
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