When you're used to the ease with which you manipulate matrices/vectors, this will seem really clumsy, backward and not very convenient at all (there's actually very defendable reasons for that, but that's a discussion for another time :). In this case, the right side must contain the same number of elements as A. MATLAB is pretty good with vectors and matrices, but when it comes to 'general arrays' you'll often have to switch to 'general methods'. On the left side of an assignment statement, A(:) fills A, preserving its shape from before. Is all the elements of A, regarded as a single column. Is the k th page of three-dimensional array A. The following table describes its use for this purpose (let us have a matrix A) − Format You can use the colon operator to create a vector of indices to select rows, columns or elements of arrays. Also, this is very verbose, there is a two line answer to your problem but without actually using MATLAB I can't think it up (there was a time when I would have known it off the top of my head, but alas, that day is no more).MATLAB executes the statement and returns the following result −Ġ 0.3927 0.7854 1.1781 1.5708 1.9635 2.3562 I don't have access to MATLAB and can't play around to make sure it is correct. Huge Note! This is untested but provides the general gist of what you need to do. Now we need to find all indicies of times after the start of one increment and before the start of the next increment: for (i=1:length(timeIncrements)-1) You will need to replace that number correctly. Unfortunately, I cannot tell how many ticks exist in a 5 minute increment in MATLAB, I'll arbitrarily pretend it is 123e3. Lets make a vector of times starting at 7.366965809837962e5 (your first time) and going up to 7.366966007986111e5 (your last time) in 5 minute increments. The second part is you need to break the time up into 5 minute increments. First of all, lets break the matrix in to vectors times=A(1,:) The nice thing about this problem is that you can break it into easy chunks. I have tried without success so any help is much appreciated. How can I calculate the average for column two and three per every five minutes (instead of per event)? So for the first 5 minutes 13:55:00 - 14:00:00 we should get the average value 8.225 for middle column and 3750 for the right column, i.e. Using MATLAB (R2015b) I have a time-series A that is a 4000x3 matrix.
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