# How to predict 8 test values using 12 other test values. 500 data points available for each tests. Also what should I do to find a relation between parameters.

How to relate two parameters? Need to check whether parameter is directly proportional or indirectly proportional with another parameter.

##### Post Metadata
- Posted at: over 6 years ago
- Author title: CSSGB | Experienced Service, Quality and Calibration Engineer seeking full-time positions
- Net upvotes: 1


## Comments
### Comment 1

The reason it failed could be missing values. Try Multiple Inputation or binning of your variables. For variable selection, you may want to use Lasso with stepwise backward instead of stepwise forward on a simple linear regression. Good luck!

##### Comment Metadata
- Posted at: over 6 years ago
- Author title: Managing Partner at The TIMi Company



### Comment 2

Hello Daniel,
Yes, you are right setting each one of 8 as a function of those 12 and using simple regression does solve it. I tried previously in the same way but as a function of 19 instead 12. But this worked for only one test.
I am also looking for some better prediction or classification model which will work on those. 

##### Comment Metadata
- Posted at: over 6 years ago
- Author title: CSSGB | Experienced Service, Quality and Calibration Engineer seeking full-time positions



### Comment 3

if I understand you well, you want to predict 8 variables using a set of 12 columns. This sounds like a simple regression. Basically build 8 regression models in which each of your "test values" is a function of the other 12 "test values". I hope this is what you are looking for.

##### Comment Metadata
- Posted at: over 6 years ago
- Author title: Managing Partner at The TIMi Company




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