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Company/University

Massey University

Personal Profile

Maths Lecturer at Massey University. Working on high performance computing and modelling.

Professional Interests: numerical analysis, modelling, computer vision, mathematical biology

Professional Interests

numerical analysis, modelling, computer vision, mathematical biology

1179Rank

4Badges

380Score

Richard Brown submitted Solution 38859 to Problem 10. Determine whether a vector is monotonically increasing

on 15 Jan 2013

Richard Brown submitted a Comment to Solution 110965

no it doesn't! it does something like:
n = sqrt(sum(x.^2,2));
x = x ./ n(:, ones(1, size(x,2)));

on 13 Jul 2012

Richard Brown submitted Solution 111664 to Problem 820. Eliminate unnecessary polygon vertices

on 13 Jul 2012

Richard Brown submitted a Comment to Solution 111016

No, gaming the test suite is out! Although Steve could yet make a mess of all this by using a polygon with floating point vertices ...

on 13 Jul 2012

Richard Brown received Promoter badge for Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted a Comment to Solution 111016

If there's any way this one could be deleted I'd like it to be, because I think it's cheating (and Sven and I had a good competition going on!)

on 12 Jul 2012

Richard Brown submitted a Comment to Solution 110965

Yeah, I tried all sorts of ways to do that too! I was trying to figure out a better way to normalise the matrix. I discovered normr, posted my solution, and then realised that it was actually a toolbox function. I'd be happy to have that entry removed :| If you replace the normalisation line with normr(diff(P)) you can get the 36

on 12 Jul 2012

Richard Brown submitted a Comment to Solution 111016

Aargh ... sorry, used a function from the neural network toolbox without realising it. Didn't know it existed (normr)

on 12 Jul 2012

Richard Brown submitted Solution 111016 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 111007 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 111006 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 111001 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 111000 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110994 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110989 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110988 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110986 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110981 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110978 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110974 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted a Comment to Solution 110965

Nicely done! Do you think we've converged on the optimum yet?

on 12 Jul 2012

Richard Brown submitted Solution 110969 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110967 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110960 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110958 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110957 to Problem 820. Eliminate unnecessary polygon vertices

on 12 Jul 2012

Richard Brown submitted Solution 110875 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted a Comment to Solution 110870

This one uses the best tool in MATLAB :)

on 11 Jul 2012

Richard Brown submitted Solution 110870 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110865 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110861 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110859 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110858 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110855 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110854 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012

Richard Brown submitted Solution 110852 to Problem 820. Eliminate unnecessary polygon vertices

on 11 Jul 2012