MATLAB: How to perform 1way-ANOVA with matrices

anova testMATLAB

Hello,

I would like to perform a 1-way ANOVA test to compare 3 groups such as I get group1 VS group2, group1 VS group3, group2 VS group3.

My "groups" are 100×3 matrices in which each column conrespond to a coordinates (x,y,z).

My question is, should I perform the ANOVA for each coordinate such as I get a comparison between the x axis of each group, then the y and so on?

Or do you have any other suggestion?

Thanks!

Best Answer

manova might be a better approach, since it allows you to combine information from all three variables (x,y,z) into a single test of group equality.

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MATLAB: Channing color, marker size and type in a gscatter

Most of this can be done by taking advantage of the optional inputs to gscatter:

gscatter(x,y,g,clr,sym,siz,doleg,xnam,ynam)

Here's one way.

Field_Size = rand(1,8); 
tau        = rand(1,8);
Field      = 1:8; 
color      = hsv(length(Field));
markers    = 's^phvdxo';
sz         = 6:2:20;
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MATLAB: Index in position 2 exceeds array bounds using crossval

Hi,

The problem in above code was that crossval does the train-test spilt and it takes in the Ytr as column vector but you did provide Ytr are a 2-D Matrix due to which we were getting that array bound error.The below code snippet should resolve and simplify your issue.

load data
% hpartition = cvpartition(81,'Holdout',0.2);
% idxTrain = training(hpartition);
% Xtr = X(idxTrain,:);
% Ytr = Y(idxTrain,:);
% % Ytr_1 = Y(idxTrain,1);
% % Ytr_2 = Y(idxTrain,2);
% idxNew = test(hpartition);
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for i=1:2
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        fcn{i,3} = @(Xtr, Ytr, Xte) predict(fitrgp(Xtr,Ytr), Xte); 
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For more information you could follow crossval documentation.

Best Answer

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MATLAB: Channing color, marker size and type in a gscatter

MATLAB: Index in position 2 exceeds array bounds using crossval

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