I want to extract values from second column of the matrix which correspond to the range 6 to 7 of the first column. How to do it?

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Abhishek Chakraborty
评论： Abhishek Chakraborty 2020-3-8
I have a 2 column matrix. Each column contains around 4 million elements (numbers). I have sorted the matrix with respect to increasing order of the first column. I want to extract the values from the second column which are corresponding to values between 6 and 7 of the first column. How to do it ?

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Turlough Hughes
Turlough Hughes 2020-3-8
Let's say your matrix is called M, then you can extract rows from column 2 corresponding to those in column 1 which are between 6 and 7 as follows:
result = M(M(:,1)<=7 & M(:,1)>=6,2);
You can also see the output from both columns to confirm that it is correct:
M(M(:,1)<=7 & M(:,1)>=6,:)

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