How to read a text file, with first column containing letters, and edit the numbers keeping the first column same?

The image is as shown below. I want to read the numbers only from the text file, and edit them accordingly, keeping the letters column (first column) as same. Thank you.

Answer 1

[KSSV]

fid = fopen(myfile) ;
S = textscan(fid,'%s %f %f %f') ;
fclose(fid) ;
C1 = S{1} ; % column 1
C2 = S{2} ; % column 2
C3 = S{3} ; % column 3
C4 = S{4} ; % column 4

[J Vard]

Thanks a lot

[J Vard]

When I am trying to read the letters (C1 in your code above) into other file using 'fprintf' command it showing some error as "Function is not defined for 'cell' inputs". I am guessing that it is because of the single quotations in C1. Is there any way to avoid those quotes so that I can print them in another text file. Thanks