Can I randomly sample from a csv file?

Hi, I have a .csv file of 1000000 values, I want to randomly sample x amount of values from this without repetition. is this possible and how would I do it? It seems the randsample function does not work in this way.

Answer 1

[Image Analyst]

Read the matrix into a variable with csvread(). Then get random samples with randperm():

myData = csvread(filename);
numberToGet = 1000; % or whatever number you want.
randomLocations = randperm(numel(myData), numberToGet)
randomlySelectedValues = myData(randomLocations); % Uses linear indexing into a 2D matrix.