How do I create a for loop to group data?

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Lui
Lui 2019-3-13
评论： Sheng Chen 2019-3-13
Hello everyone
I have set a set of annual data which I would like to group into seasons. I can do this through concatenation of the individual months as below:
jan= SUNdat(1==month(SUNdat.Date),:);
feb= SUNdat(2==month(SUNdat.Date),:);
mar= SUNdat(3==month(SUNdat.Date),:);
dec= SUNdat(12==month(SUNdat.Date),:);
Summer=[jan;feb;mar;dec];
This is a longer way. So instead I a trying to implement a for loop as below but it is not working
n=1:3;
for n=3
summer=SUNdata(n==month(SUNdat.Date),:);
n=n+1;
end
This returns an error. How else can I implement this to be able to group my data as explained

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