Given n as input, generate a n-by-n matrix 'O' using 0 and 1 .
[1 1 1 1
1 0 0 1
1 0 0 1
1 1 1 1]
three solution, all great.
What is the distance from point P(x,y) to the line Ax + By + C = 0?
intersection of matrices
Given a 4x4 matrix, swap the two middle columns
Rounding off numbers to n decimals
Find out sum of all elements of given Matrix
Find all repeated numbers
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