Joao Ejarque

2013 年からアクティブ

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質問

How can I efficiently extract a max along two dimensions, from a 4 dimensional array, without writing a double loop?
I have the following loop. It picks values from a matrix A(nb,nd). For each vaue of this matrix A it constructs a matrix B = F...

約12年前 | 1 件の回答 | 0

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質問

indexing into a matrix to eliminate a loop
This file generates an ergodic density matrix. I would like to get rid of the inner loop (over ii). The first line in the outer ...

12年以上前 | 2 件の回答 | 0

2

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質問

How can I avoid a simple loop where matrices are created and then summed?
P is a matrix of size (ny,ny); F0 is a matrix of size (nh,ny); Each row of P multiplies its respective column of F0, creating ...

12年以上前 | 2 件の回答 | 0

2

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質問

how to allocate elements of a vector into different rows in a matrix, preserving the column order?
Consider Z = zeros(4,2); X = [0.15 , 0.33]; P=[2 3]; I am looking for the simplest form of applying P to X and ...

12年以上前 | 1 件の回答 | 0

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質問

indexing into a matrix
I have a dataset. It is a matrix Z with say, N total observations (rows), and K variables (columns). However, the total N obser...

12年以上前 | 0 件の回答 | 0

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質問

What is the most compact way to update an index vector out of a cube?
I have 3 vectors each with n elements (n individuals). Two of them are exogenous state vectors y and r, both with n elements...

12年以上前 | 1 件の回答 | 0

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