Manipulating Vectors and Matrices
How to manipulate vectors and matrices in Julia and R? The following table translates the most common Julia commands into R language.
| Julia | R | |
|---|---|---|
| Transpose | ||
A.' |
t(A) |
|
| Complex conjugate transpose | ||
A ' |
Conj(t(A)) |
|
| Concatenate horizontally | ||
A = [[1 2] [1 2]] |
A = c(c(1,2),c(1,2)) |
|
| Concatenate vertically |
||
A = [[1 2]; [1 2]] |
A = rbind(c(1,2),c(1,2)) |
|
| Reshape (to 5 rows, 2 columns) |
||
A = reshape(1:10, 5, 2) |
A = matrix(1:10,5,2) |
|
| Convert matrix to vector |
||
A[:] |
c(A) |
|
| Repeat matrix (3 times in the row dimension, 4 times in the column dimension) |
||
repmat(A,3,4) |
kronecker(matrix(1,3,4),A) |
|
| Flip Matrix form left to right |
||
flipdim(A, 2) |
A[,dim(A)[2]:1] |
|
| Flip Matrix up/down |
||
flipdim(A, 2) |
A[dim(A)[1]:1,] |
|
Complete Julia-R Cheatsheet
1) Creating Vectors
2) Creating Matrices
3) Creating Random Numbers
4) Manipulating Vectors and Matrices
5) Accessing Vector/Matrix Elements
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