Finding data points of two different matrices based off of time

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Krispy Scripts
Krispy Scripts 2016-10-25
评论： Krispy Scripts 2016-10-26
I have one matrix with data in the first column and time stamps in the second column (datamatrix.mat). The next matrix contains spiketimes (spiketimematrix.mat). I want to get the data point in the first column of first matrix that is the closest time point corresponding to the spike times in spiketimematrix.mat. For example, the first spiketime is 166.1670, which corresponds to the closet time point of 166.1696 and corresponds with the data point 2.5281. I have tried using the following code:
for k=1:length(spiketimesmatrix)
dataout(k)=datamatrix(find(spiketimesmatrix>=datamatrix(:,2),1);
end
I keep getting the first data point as the entire dataoutput.
Not sure if this is clear enough.

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采纳的回答

Chris Dischner
Chris Dischner 2016-10-25
Why not use a difference?
First matrix, a, second matrix b:
for i = 1:length(a)
[m,idx] = min(abs(a(i,2))-b(:,1));
minVal(i) = a(idx,1);
end

更多回答（1 个）

Walter Roberson
Walter Roberson 2016-10-25
dataout(k)=datamatrix(find(spiketimesmatrix(k)>=datamatrix(:,2),1);
  2 个评论
Krispy Scripts
Krispy Scripts 2016-10-26
My data output is the first value repeated over and over again? I am guessing this is something I am doing incorrectly?
Krispy Scripts
Krispy Scripts 2016-10-26
Actually its not getting the first value, I am not sure what value it is getting, but it is getting it repeatedly over and over again

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