Hi Michael,
it is in fact invalid to compute r^2 as in the case of ordinary
least square. The link below may, however, point you in the right
direction:
http://www.mathworks.com/support/solutions/en/data/1-CMABGO/index.html?product=ST&solution=1-CMABGO
HTH
Raphael
Am 04.08.2011 23:15, schrieb Michael Lombardo:
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type="cite">Hi
SPMers,
I have a stats question that isn't necessarily related to SPM,
but is applying matlab code on some imaging data I have. I'd
like to calculate a partial r squared value or coefficient of
determination using robust regression (my analysis uses the
Matlab function robustfit). Could anyone help with a suggestion
about how to do this? I know how to do this in an ordinary
least squares regression, but am at a loss right now for what is
the proper way to do this for robust regression.
Thanks,
Mike
