Can you generalize this so there is more than one test? As it is, I can just provide the answer directly without needing to use MATLAB.
I went ahead and added some more tests.
Exchange April-May position in your example to correspond to the title of your problem
header of problem definition contradicts with example give. Please correct the given examples.
I second Dimitris' and Nick's comments.
Currently test 2 and test 3 are identical. Was test 3 perhaps supposed to be "May I come to visit you in May?" ? I notice that in each of the tests "May" always appears exactly once (not counting "may"). There should probably have been some cases where "May" doesn't appear at all, and some cases where it appears more than once in the input text.
The explaination of the question seems wrong. you are asking to replace May with April and in example you are replacing April with May
Example at top of page (beginning with 'For instance, if the input is') has April and May back to front.
I suspect this submission 'may' only work for ONE instance of "May" per test. See Solution 1461036 for an alternative syntax for the function used herein.
Check if sorted
2 b | ~ 2 b
Arrange vector in ascending order
Do Fast Fourier Transformation
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Sum of diagonal of a square matrix
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