Subscripted assignment dimension problems?

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bio lim
bio lim 2015-5-25
评论： bio lim 2015-5-25
Hello. I have 1x46 structure array called 'data' with numerous fields. I am particularly interested in the 'Time' field. I am trying to use subscripted assignment to calculate the time difference. Below is my code
for n = 1 : length(data)
time_dis(n) = diff(data(n).Time);
end
I know my code is wrong since there are some dimensional errors. Can anyone provide insights? Any help would be greatly appreciated. Thanks.

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Stephen23
Stephen23 2015-5-25
编辑：Stephen23 2015-5-25
If each Time value is one single scalar then you can use this:
diff([data.Time])
You will find this useful to read through and understand:
http://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html
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Stephen23
Stephen23 2015-5-25
Given that each Time values is a 1x40 vector, I would do the following:
>> A(3).Time = [1,2,3,4];
>> A(2).Time = [0,2,4,6];
>> A(1).Time = [0,3,6,9];
>> diff(vertcat(A.Time),1,2)
ans =
3 3 3
2 2 2
1 1 1

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