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Error using CSD model on data #1405

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cbinhb opened this Issue Jan 25, 2018 · 8 comments

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cbinhb commented Jan 25, 2018

A bit new to using DiPy with fibertracking but keep getting this error when trying to use the CSD model on my data. Any clues as to what might be wrong?

/ifshome/cboyle/anaconda3/lib/python3.6/site-packages/dipy/reconst/csdeconv.py:130: UserWarning: Number of parameters required for the fit are more than the actual data points
warnings.warn(msg, UserWarning)

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arokem commented Jan 25, 2018

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cbinhb commented Jan 25, 2018

Actually I think it was causing a problem when I used this line first (from the Dipy examples for CSD to calibrate response/ratio etc) and in turn used "response" in my csd_fit line.

response, ratio = auto_response(gtab, data, roi_radius=10, fa_thr=0.7)

It's indicating the "parameters" or arguments for the function are too many correct? So took "response" out of my CSD equation. Does this make sense?

You did give me some information I need with regard to sh_order since I wasn't sure what that was. How do you specify the default since I do have 45 (HARDI) directions?

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cbinhb commented Jan 25, 2018

it does give me error saying sh_order must be an even number when I try 45. Maybe it's 46?

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cbinhb commented Jan 25, 2018

The documentation is a bit confusing.

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cbinhb commented Jan 25, 2018

oops maybe you were right - getting the error again. My data has 46 directions, what should my csd_model equation have as parameters?

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cbinhb commented Jan 26, 2018

ok! reduced sh_order to 4 and it worked. I obviously need to figure out what SH number should be but for now I'm good. Thank you!

@arokem arokem closed this Jan 26, 2018

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arokem commented Jan 26, 2018

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cbinhb commented Jan 26, 2018

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