How to implement a Bivariate Normal Density function when your mu is given in a column matrix

2012 1 27
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Dear all, I'm fairly new to Matlab and I'm trying to implement a Bivariate Normal Density function but mu is given in a column matrix. mvnpdf as a function will only take row matrices. All the examples I have seen are considering mu as horizontal array. I even tried to implement the formula mathematically but I can not get to multiply properly (X-MU)*Covariance transposed * (X-MU) without getting an error that the inner matrix dimensions must agree. I can tell that the order does not agree....Any ideas on either approach? Any help highly appreciated. Thanks in advance....

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回答（1 个）

Honglei Chen
Honglei Chen 2012-1-27

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Just pass in mu.' instead, i.e.,
mvnpdf(x,mu.')

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Neftali Ricardo
Neftali Ricardo 2012-1-27
Hello Hoglei,
How are you? What do you mean with "pass in" ? ...
Honglei Chen
Honglei Chen 2012-1-27
Just as what I show in the example. Use .' to convert a column vector to a row vector
Neftali Ricardo
Neftali Ricardo 2012-1-27
But then, the mu will not be the same as given and that would change the results of the Normal Density function?

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