How to name every row of 100*2500 matrix in MATLAB?
You can assign each row to a vector as follows:

row1 = matrix(1,:);


That will store the whole first row of matrix in row1.

To do this "automatically", you can store all the vectors containing each row in a cell array, for example:

for k = 1:size(matrix,1) %For each row
    rows{k} = matrix(k,:); %Store the k-th row in the k-th element of the cell array
end