Missing anova function Statistics and Machine Learning Toolbox

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Azadeh Sharafi 2016-8-24

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https://ww2.mathworks.cn/matlabcentral/answers/300791-missing-anova-function-statistics-and-machine-learning-toolbox

评论： Swarooph 2016-8-31

I checked using "ver" command and I have Statistics and Machine Learning Toolbox Version 10.2(R2016a). but I couldn't find "anova" function. "exist anova" return 0 while "exist anova1" return 2. how could I reinstall the toolbox?

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Answer 1

Swarooph 2016-8-30

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https://ww2.mathworks.cn/matlabcentral/answers/300791-missing-anova-function-statistics-and-machine-learning-toolbox#answer_233180

在 MATLAB Online 中打开

anova is a function (method) that is embedded inside the class CompactLinearModel. That is why we are unable to find it using exist or which for that matter. anova1 however is a standalone function that is why we are able to find it. Try an example code to see if it works. For e.g. the following one from the doc page here:

X = randn(100,5);
y = X*[1;0;3;0;-1]+randn(100,1);
mdl = fitlm(X,y);
tbl = anova(mdl)

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Answer 2

Azadeh Sharafi 2016-8-30

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Thanks, That worked. So basically I can only use anova with fitlm model? I tried fit command and got the error "Undefined function 'anova' for input arguments of type 'cfit'."

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Swarooph 2016-8-31

Disclaimer: I don't know enough about anova to completely answer this.

However, when you search for it in the documentation, you see 4 different results for anova. So it seems like it can work on CompactLinearModel through functions such as fitlm, RepeatedMeasuresModel through functions such as fitrm, LinearMixedModel through functions such as fitlme and GeneralizedLinearMixedModel through functions such as fitglme.

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