Hey all, may you can tell me some insights about the arrays in julia and their dimension. I came from python3.7 and want to translate a python script to julia. I need to create a list, and iterate through a set of vecs, with each iteration I append this to X_l. So far so good. I put X_l into np.ar…

It would be much easier to help if you posted an MWE. [image] Please read: make it easier to help you Meta Discussion Welcome to the Julia Discourse! We are enthusiastic about helping Julia programmers, both beginner and experienced. This public service announcement (PSA)…

Here is the MWE: python 3.7 import numpy as np Variables en_fr = { ‘the’: ‘la’, ‘and’: ‘et’, ‘was’: ‘était’, ‘for’: ‘pour’ } english_vecs = { ‘the’: np.asarray([0.08007812, 0.10498047, 0.04980469]), ‘and’: np.asarray([7.12890625e-02, -2.58789062e-02, 1.81884766e-02]), ‘was’: np.asa…

Your MWE didn’t work for me: >>> X_l = list() >>> english_set = set(english_vecs.keys()) # Dictionary keys Traceback (most recent call last): File "<stdin>", line 1, in <module> for en_word, fr_word in en_fr.items(): #en_fr is a Dictionary #if condition en_vec = english_vecs[en_word] X_l.append(…

May It was not a clear MWE, actually I posted it too fast. I will generate a better one.

Please quote your code with backticks.

You could use push! instead of append!. The result is a vector of vectors. Concatenate into a Matrix with X_l2 = reduce(hcat,X_l) |> permutedims to get shape (4, 3).

One thing I think is nice to mention is that, in Julia, you can write explicitly what you want using simple definitions and loops, and obtain an efficient code. In this case, you could have done, for example (after using push!): X = zeros(length(X_l),length(X_l[1])) for i in 1:length(X_l) for j i…

[image] lmiq: X = zeros(length(X_l),length(X_l[1])) for i in 1:length(X_l) for j in 1:length(X_l[i]) X[i,j] = X_l[i][j] end end A comprehension X = [X_l[i][j] for i in eachindex(X_l), j in eachindex(X_l[1])] is also a good option for constructing arrays via loops.

Arrays, Matrix, append!

General Usage Performance

Tamas_Papp September 7, 2020, 7:46am 2

It would be much easier to help if you posted an MWE.

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Arrays, Matrix, append!

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