Member function in Eigen math library for vector magnitude

Question

I have been trying to find a method that computes the magnitude of a vector in Eigen and I was not able to. Can somebody provide me with the function name of just if it doesn't exist?

I can create a global method that does the job but I prefer not to.

A vector in mathematics is different from a CS vector. Exactly what vector are you talking about. — Martin York, Apr 10 '11 at 16:32
@Martin I am using http://eigen.tuxfamily.org/index.php?title=Main_Page and I want to get the magnitude of an Eigen::Vector3f instance I have created. — Alex, Apr 10 '11 at 16:46

score 50 · Accepted Answer · edited Mar 08 '16 at 18:20

50

You want .norm(). Note that there's also .squaredNorm(), .normalized() and .normalize().

edited Mar 08 '16 at 18:20

Calimo

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answered Apr 10 '11 at 20:21

timday

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score 5 · Answer 2 · edited Jan 06 '12 at 01:17

5

The method you're looking for is .norm().

edited Jan 06 '12 at 01:17

Peter O.

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answered Apr 10 '11 at 19:01

Benoit Jacob

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Member function in Eigen math library for vector magnitude

2 Answers2