It would be beneficial for the problem if zeros were added to test cases, for example [...,1,2,0,-1,-2,...], [...,1,2,3,0,2,3,...], [...1,2,3,0,0,0,1,2,...], [...,1,2,0,0,-1,-2,...], etc.
Additional test cases have been added and the description slightly modified.
Find the sum of all the numbers of the input vector
Create an n-by-n null matrix and fill with ones certain positions
Maximum value in a matrix
MATLAB Basic: rounding III
stem and leaf plot
The Matrix Construction
Dimensions of Spaces
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