Data science algorithm (SOM, NMF; PCA; LDA)

I am new at matlab. I need some guideline t built a code related to data science terms, NMF, PCA, SOM etc.

[SALAH ALRABEEI]

The codes are almost already built as function in Matalb. what you need to do is to understand first what is idea behind the cod, then it is easier to apply it.

I think the matlab doc has enough examples in how to use each function. Call these doc from your matlab

% For example, try this and see several examples
doc pca