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 Mar10 awarded Notable Question Sep24 awarded Autobiographer Apr30 awarded Supporter Apr30 accepted Cartesian Line to Projective Coordinates Apr29 revised Cartesian Line to Projective Coordinates edited tags Apr29 asked Cartesian Line to Projective Coordinates Aug18 awarded Popular Question Oct31 awarded Scholar Oct31 accepted Graph Theory Shortest Path Problem via Matrix Operations in MatLab Oct29 comment Graph Theory Shortest Path Problem via Matrix Operations in MatLab thanks for the information. The power of matrices is what I was looking for and your explanation and code has helped. Can you explain why you want to set the main diagonals to zero? They contain valid paths. Oct28 asked Graph Theory Shortest Path Problem via Matrix Operations in MatLab Oct25 comment Matlab Matrix Multiplication Calculate Significant Figures Thanks for the response and detailed explanation! I have a some-what good idea of what you are saying get I need the condition number, which will give me the a good enough estimate to the digits of precision (I like your wording better) However, when it comes to finding the conditional number, I am lost. I added a test case to my original post. When computing z I need to get a number close to 15 (depending on how liberal I am with rounding up to 16 or down to 14, etc). Doing the conditional math on the value of x keeps returning 1. I may be confused on the upper bound case. Oct25 revised Matlab Matrix Multiplication Calculate Significant Figures Added test case Oct25 awarded Student Oct25 awarded Editor Oct25 revised Matlab Matrix Multiplication Calculate Significant Figures Made question more clear. Oct25 asked Matlab Matrix Multiplication Calculate Significant Figures