mdl object: put "F-statistic vs. constant model: ... , p-value = ..." into variable
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fitlm() displays, among other things, the F-statistic and p-value for the fit as a whole. I can't find these values in the mdl object, however. Could someone point me to how I can find, or calculate this value using the data in the mdl object?
回答（2 个）
gusjammo
2015-9-8
1 个投票
Hello Evan, I think that you may be able to do it with coefTest(mdl), although this defaults to a horizontal line along the x-axis, so you might have to override the default with the average y-value, for instance.
1 个评论
fateme
2022-1-9
Hi the question is for long time ago but maybe this answer helps others. Yes as Gusjammo said based on the help of Matlab this works:
[p,F] = coefTest(mdl)
However for me,this function gives NaN inspite of showing values of p , F by typing 'mdl'.
the cyclist
2015-8-20
I'm not sure it is very well documented, but if you type
mdl.
at the command line, you will see the list what is included in the model object.
The P-values are
mdl.Coefficients.pValue
or
mdl.anova.pValue
and the F-stat is
mdl.anova.F
4 个评论
the cyclist
2015-8-20
Oh, hm. That does not seem to be the same F-stat as in the simple display. I feel like it must be in the model object, but I poked around some more and did not find it.
Evan
2015-8-20
the cyclist
2015-8-20
I misspoke when I said to enter "mdl." in the command window. What you should do is type "mdl." without hitting Enter, and then hit Tab to see the possible completions of that. Then you will see things like Coefficients, etc.
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