Finding Corresponding Data at Events

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Krispy Scripts 2016-4-2

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https://ww2.mathworks.cn/matlabcentral/answers/276673-finding-corresponding-data-at-events

评论： Star Strider 2016-4-6

I have a matrix with data in one column and corresponding time intervals in the next column. Another matrix has event times. I am wanting to get the data from the first matrix that corresponds to the event time. I feel like this is simple, but I am having issues choosing the right way to go about this. The data is continuous so I want to make sure that I am getting a good approximation of the data when event times are between intervals.

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Krispy Scripts 2016-4-4

In first column of matrix1 is frequency data and in the second column is regular intervals of time that correspond to the frequency data. Matrix2 is time points of events that correspond to the time from matrix1. I want to take the frequency data points from matrix1 based on the events that are happening in matrix2.

Krispy Scripts 2016-4-4

The time stamps in column 2 of matrix1 and event times in matrix2 are directly related

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Star Strider 2016-4-5

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There are only three rows that exactly correspond:

D1 = load('Heath Robinson Matrix1.mat');
D2 = load('Heath Robinson Matrix2.mat');
M1 = D1.Matrix1;
M2 = D2.matrix2;
[CommonTimes, ia, ib] = intersect(M1(:,2),M2);
DesiredResult = M1(ia,:)
DesiredResult =
      0.0027084     0.045775
      -0.083389      0.23977
       0.051537      0.25477