How do I perform unbalanced ANOVA ?
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Hi! I have 3 vectors of data (each vector has a different number of data) and I'd like to perform ANOVA. How do I do it?
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Hanling Su
il 10 Feb 2020
Hey you can use anova1 but assign specific group variable, for example, you can create two vector, the first one is the observations of your sample, group by group data = [x11, x12, ... x120, x21, x22, ... x227, x31, x32, .. , x317]. And you create a correspongding group vector, for this example group = [1,1,1...,1, 2, 2, ... , 3, 3, ...], as long as the observations have the same index as its group, you can use anova1(data, group), it will automatically group the data for you.
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Samar Ragab
il 22 Set 2019
try this ,
g1=ones(1,size(classA3,1));
g2=2*ones(1,size(classB3,1));
g3=3*ones(1,size(classC3,1));
p1=zeros(1,26);
for i=1:26 %%%crossponding to features numbers(columns)
x=[classA3(:,i);classB3(:,i);classC3(:,i)]' ;
g=[g1,g2,g3];
p1(i)=anova1(x,g,'off');
end
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