butchild created MATH-1428:

             Summary: OLSMultipleLinearRegression estimates different  
residuals with different order of input
                 Key: MATH-1428
                 URL: https://issues.apache.org/jira/browse/MATH-1428
             Project: Commons Math
          Issue Type: Bug
    Affects Versions: 3.4.1
         Environment: win7  64bit  jdk1.8  intelljidea 
            Reporter: butchild

I have a regression job with  31 X  ,which 30 of them are dummys .
And the length of data is 800+ .
I'm using OLSMultipleLinearRegression to do regression.
I found if I change the order of the 800+ data, the residuals I got from  
are differents ,and  the correlation of the two differet  rersiduals is near 
100%,like 99.8%.

My data is below in Docs Text area.
The fields of each Column is :

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