MATLAB: Comapre matrix and function a operation

comparisonfunctionmatrix

A=[5 10 15 20 25] B=[1 1.5 2 4 8 14 17 25 18 16 22 23 17] the martix element B has to be compared with A to see between what range the fall and the lowest of the range has to be subtracted. for example 8 is between 5 and 10 it returns 8-5=3 25 is between 20 and 25 returns 25-20=5 Result:C=[1 1.5 2 4 3 4 2 5 3 1 2 3 2] tried with looping it is not fast enough. Kindly help me how to make it faster. Thanks!

Best Answer

Here is one solution. You might need to clarify some special cases. What the output should be if B contains value 25 or 20?
A=[5 10 15 20 25];
B=[1 1.5 2 4 8 14 17 25 18 16 22 23 17];
C=interp1(A,A,B,'linear')-interp1(A,A,B,'previous');
C(isnan(C))=B(isnan(C))
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