ttest - 2 matrices
显示 更早的评论
Hello, I have 2 matrices 52x21x49. Here x=52, y=21 and each of these 'tiles' have 49 values.
I want to do a ttest on each tile to see if the 49 values in each tile of matrix A is drawn from a different distribution than the same tile in matrix B.
Therefore my h and p should = 52x21 each. Is there a smart way of doing this without a for loop?
Thanks, S
采纳的回答
Tom Lane
2012-3-9
Since TTEST wants to work along the first dimension, you can just move that dimension to the front using PERMUTE. Then use SQUEEZE to get rid of the extra dimension. Something like this:
>> a = rand(3,4,5);
>> b = rand(3,4,5);
>> [h,p] = ttest2(permute(a,[3 1 2]),permute(b,[3 1 2]));
>> squeeze(h)
ans =
0 0 0 0
0 0 0 0
0 0 1 0
>> squeeze(p)
ans =
0.6347 0.2035 0.2729 0.6062
0.7198 0.7766 0.0945 0.5118
0.2029 0.5078 0.0111 0.3311
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息
Translated by 
