ICA demystified

Demystifying the black box

Demystifying the ICA black box – Source : Image

This post has been on the back of my mind for quite some time, ever since I wrote about Principal Component Analysis. Independent Component Analysis or ICA is an algorithm to extract underlying structure hidden in multi-dimensional datasets. As for PCA, It is fairly ubiquitous (including in Neuroscience). However, as opposed to PCA, getting an intuitive understanding of ICA is much harder and many persons use it as a magic black box (no offense, I have been there too). I won’t provide comments on any code as fastICA is already freely available in Matlab. My hope here is to facilitate the understanding of what ICA is and how it works.  Continue reading

Posted in Intermediate | 1 Comment

Stucked? How to get some help.

How to get some help ? (Image source )

How to get some help (Image source)

While my goal here is to help you out with Matlab and other data analysis endeavors, I can’t cover the vast number of problem you may encounter. Still, I can provide you with a general approach that should help you to solve most problems. That is the goal of this post. I think everyone should be interested in this one, both the Matlab gurus and the beginners.

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Posted in Beginners | 1 Comment

Mathematical operations in Matlab and the point

What's the point in Matlab?

What’s the point in Matlab?

The point of this post is to talk about doing mathematics in Matlab. This is an extension of our previous post on Kickstarting Matlab. You will learn how to use all mathematical operators and get to understand your Matlab second best friend (after the profiler) : the point or dot operator. We also briefly talk a little bit about Matlab history. My only hope is that after this, you will get the point.

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Introduction to Object-Oriented Programming in Matlab

Object-oriented programming in everyday llfe.

Object-oriented programming in everyday llfe.

In this long overdue post, I help you get started with Object Oriented Programming (OOP) in Matlab. We start with a little bit of history of OOP, talk about why and when this is useful and turn to few Matlab examples for you to get immediately started.

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How to share your figure in the cloud

Original blog illustration by Cali Rossi

Original blog illustration by Cali Rossi

Today is a special post for a new online tool that hold some very interesting future. It’s about a new online tool from plot.ly, a startup company in Montreal. I like their work a lot and decided it was worth giving them some little pushes as modestly as I can.

The idea is simple : Sharing your figures and plots in the cloud instead of sending good old screenshots.

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Posted in Advanced, Beginners, Intermediate, Various | 3 Comments

Recursive functions

Original blog illustration by Cali Rossi

Original blog illustration by Cali Rossi

In this post, I introduced you to the beauty of recursive functions. I believe that these are part of the “basic programming package” that anyone into coding should have been introduced to.

I quickly discuss the theory and their usage along with a few examples.  Continue reading

Posted in Beginners, Intermediate | 3 Comments

The past, present and future of numerical computing

Original blog illustration by Cali Rossi

Original blog illustration by Cali Rossi

This post serves as an introduction to numerical computing as well as a nice overview of the current landscape of numerical calculation. I also present some of my perspectives on the future of the field which could raise general interest, even to long-time and experienced programmers. I don’t intend to be prophetic but I hope to, maybe, generate an interesting discussion on the topic.

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Posted in Advanced, Beginners, Intermediate, Various | 5 Comments