Perform student t-test on 3D matrix (on each grid point)
9 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi I have a 3D matrix (x,y,z) and I need to perform a t-test at each grid point (x,y) to test if the mean of the values in the z direction is significantly higher than zero.
My attempt:
A=data(306,6,63); %data
for x=1:306
for y=1:6
h(x,y)=ttest(A(x,y,:),'Alpha',0.01,'Tail','right'):
end
end
I wasn't sure how to handle the z direction in the loop. I've played around this this a lot getting various errors, right now it says "The data in a paired t-test must be the same size". I want to do a one-sample test on each grid point to get a 2D output indicating which grid points are significantly different.
0 Kommentare
Akzeptierte Antwort
the cyclist
am 1 Sep. 2013
It's just a minor syntax error. Try
h(x,y)=ttest(A(x,y,:),[],'Alpha',0.01,'Tail','right');
Notice that I put in an empty array for the second argument.
(This was not particularly clear, in my opinion, from the documentation.)
3 Kommentare
the cyclist
am 1 Sep. 2013
Since I did not have your data, this is the code I ran:
A = randn(306,6,63);
for x=1:306
for y=1:6
h(x,y)=ttest(A(x,y,:),[],'Alpha',0.01,'Tail','right');
end
end
Does that work for you?
If not, it could be a versioning issue. I have R2013a on Mac OS X 10.8.4.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Logical finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!