Problem 381. Angle between two vectors

You have two vectors , determine the angle between these two vectors

For example:

u = [0 0 1];
v = [1 0 0];

The angle in degrees between u and v is 90.

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71 solvers submitted 169 solutions (2.38 solutions/solver).

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David Young on 22 Feb 2012

It would be good to have a more challenging test suite - see the guidelines for problems. Some solvers write code that is just a lookup table for the test cases, and having only one case makes it trivial to do this.

Rick Rosson on 25 Feb 2012

Also, your test should not use string comparison to evaluate what is a purely numerical computation. It would be better if you subtracted the correct answer from the proposed answer, and then compared the absolute value to a am all threshold, such as 1e-6.

Aurelien Queffurust on 2 Mar 2012

Thnaks for your comments. It was my first or second problem sent to CODY. I didn't catch all the tricks to make strong test cases yet.

Aurelien Queffurust on 11 Jun 2012

I have rescored the problem after adding more robust test suites.

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Solution 65792

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Aurelien Queffurust on 5 Jul 2012

cool I have learnt a new MATLAB function

Solution 60488

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Aurelien Queffurust on 5 Jul 2012

This solution requires Neural Network Toolbox

Solution 51364

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Rick Rosson on 25 Feb 2012

Sorry for cheating, but you made it too easy...

Problem 381. Angle between two vectors

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71 solvers submitted 169 solutions (2.38 solutions/solver).

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