help > Is there a maximum number of matrices inputs for NBS
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Jan 16, 2025  09:01 AM | liam nestor - University of Cambridge
Is there a maximum number of matrices inputs for NBS

I have thousands of matrices (~5000) as inputs in order to perform unpaired t-tests. I have been experimenting with smaller samples to begin with ( ~700) and NBS runs without problems. As soon as the number goes beyond 1000 matrices as inputs I get a message about the design matrix not being found or inconsistent. I'm updating the design matrix to align with the number of matrices inputs, so I don't understand. Any ideas why this might be happening? All the best, Liam.   

Jan 16, 2025  02:01 PM | liam nestor - University of Cambridge
RE: Is there a maximum number of matrices inputs for NBS

I think I have figured out the problem now. All the best, Liam. 

Jan 16, 2025  11:01 PM | Andrew Zalesky
RE: Is there a maximum number of matrices inputs for NBS

I can't think of any reason why the number of matrices would be limited to 1000. There is no limit imposed in the code. 


Perhaps this is a memory issue... 


Originally posted by liam nestor:



I have thousands of matrices (~5000) as inputs in order to perform unpaired t-tests. I have been experimenting with smaller samples to begin with ( ~700) and NBS runs without problems. As soon as the number goes beyond 1000 matrices as inputs I get a message about the design matrix not being found or inconsistent. I'm updating the design matrix to align with the number of matrices inputs, so I don't understand. Any ideas why this might be happening? All the best, Liam.