Subscripted assignment dimension problems?

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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 2015-5-25

What size is each Time variable? Scalar, vector, matrix or array?

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Answer 1

Stephen23 2015-5-25

编辑：Stephen23 2015-5-25

在 MATLAB Online 中打开

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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 2015-5-25

在 MATLAB Online 中打开

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

bio lim 2015-5-25

Thanks!.

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