Now, you say that you'd like the 3 numerical values which can be obtained by:
a = cell2mat((textscan(line,'%f V,%f counts,%f ms')));
However, if you wanted to read the file in one go... you could use:
a = cell2mat(textscan(fileID,'%f V,%f counts,%f ms'));
There are further improvements that can be made to this code (checking that the file opens correctly, using more appropriate data types etc etc) but this should achieve what you intend.