how can reduce my feature in each row of matrix ?

i have matrix that each row is features of one data and  each row is 256 feature and i want to reduce to 39 feature,how can do it?
and how can reduce new row feature to 25 feature and comparison with that matrix?
can i reduce one row feature?

Answer 1

[Aditya]

Hi Haleh,

To reduce the dimensionality of your dataset from 256 features to 39 features (and then further to 25 features), you can use techniques such as Principal Component Analysis (PCA). PCA is a commonly used method for dimensionality reduction that projects the data into a lower-dimensional space while preserving as much variance as possible.

Please refer to the following documentation:

https://www.mathworks.com/help/stats/pca.html