Julia usage in SF2526

How do I translate:

[~,I]=sort(sum(abs(Z1),1));

Answer:

I=sortperm(sum(abs.(Z1),dims=1))  

(or similar)

Image processing

The internal format for representing images in Julia differs from MATLAB. Read documentation at https://juliaimages.org/latest/ Links to an external site.

When Images.js are loaded, it is possible to load images using simply

img = load("/Path/to/image")

Carefully study the typeof() the loaded values. To access red/green/blue color channel, use [color].(img), and to change underlaying format use [format].(img). It is possible to show images using simply plot(img) (assuming using Plots), but there are faster alternatives. To build an image from the separate color channels, use img = colorview(RGB, redmatrix, greenmatrix, bluematrix)

How to read a .mat file

using MAT;
B=matread("Bwedge.mat")["B"];