How to calculate the statistics/ percentile in julia

General Usage
1

Hello,

I’m new in Julia and I would like to do some statistics.
How can I calculate a percentile of a matrix?
I installed the using StatsBase package and I’m doing:
percentile(mymatrix, 25), however I get an error

2

Try

percentile(vec(mymatrix), 25)

as mymatrix is 2D and percentile expects a 1D vector. The vec(...) operation should not incur any performance penalty.

3

Hello,
I think that this is not what I want.
This returns only a single value, and what I want to obtain is the percentile of the complete matrix. In fact what I’m searching is the equivalent of matlab function “prcntile”
Thank you in advance.

4

The way how the question is posted is somewhat ambiguous, because the meaning of “a percentile of a matrix” depends on how the values stored inside the matrix are interpreted.

5

That would be percentile.(eachcol(mymatrix), 25). the key thing to realize here is that in Julia unlike Matlab, a Matrix and a list of lists are fairly different.

1 Like
6

Thank you Oscar, this worked for me!