Boost your Octave (for MATLAB users)

Let’s face it, you are using Octave because MATLAB is too expensive for you. Maybe you’re not student anymore and got used to play with MATLAB, but now you need the best free alternative.

Certainly, if money is not a problem, MATLAB would overperform Octave in most of their characteristics (not all of them and I’ll show you) and is surely the best option.

Fear not! GNU Octave is here, and yes, it is indeed the best alternative to MATLAB, but… it’s not the same. We know, and here I present some useful tips to avoid any conflict with your migration to the Octave world.

Octave-logo Continue reading

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A fancy visualization of planes intersecting – Part 3 (and Final)

The mystery is over! From the previous posts we have seen the way we can generate a random plane, and visualize 3 of them at the same time showing their intersecting point.

It might be enough for some simple visual purposes, but we are more ambitious than that and we want to get it fancier.planes intersecting

And that’s why I’m here! This final step would be to achieve a neat visualization of our three planes and even the equations involved. Let’s begin with what we have so far:

P = rand(3);
d = rand(3,1);
x = P\d;
hold on
drawPlane(P(1,:), d(1))
drawPlane(P(2,:), d(2))
drawPlane(P(3,:), d(3))
scatter3(x(1), x(2), x(3))

Where the function drawPlane was defined as:

function drawPlane(P, d)
[x, y] = meshgrid(-10:10);
z = -(1/P(3))*(P(1)*x + P(2)*y - d);
surf(x, y, z);

Continue reading

The playlist of the nerds

It is like a spell to get my attention, and work perfectly. Jazz music and the concepts of Numerical Computation, Machine Learning and Image Understanding might seem very difficult to mix, but it happens and it is entertaining as nothing else.

First of all those topics entertain me a lot and, being a big fan of Jazz, I actually love the many people try to involve the listeners to my passions, like if they know what I like and put them together for me. For sure many people feel like me.

Well, many versions of these Nerd songs are rolling in internet. Following you’ll find a Playlist I made dedicated for the classic songs of the most used Numerical Computation Methods. A nerd list among the nerdiest things. Enjoy it! Continue reading