MATLAB create a new column

Question

http://stackoverflow.com/questions/3071558/how-can-i-merge-this-data-in-matlab

my question is related to the above link. With the code below (thanks gnovice), it will create a new file with 3 column (overwrite column time). Instead of overwrite column time I want to add the modified time as a new column..which makes the new file =4 columns [a time c modifiedTime].

a = [1; 2; 3; 4; 5];          %# Sample data
time = [10; 40; 20; 11; 40];  %# Sample data
c = [0; 1; 0; 0; 1];          %# Sample data

index = find(c == 1);                %# Find indices where c equals 1
temp = time(index);                  %# Temporarily store the time values
time(index) = 0;                     %# Zero-out the time points
time(index-1) = time(index-1)+temp;  %# Add to the previous time points
c(index) = 0;                        %# Zero-out the entries of c

fid = fopen('newData.txt','wt');              %# Open the file
fprintf(fid,'%g\t %g\t %g\n',[a time c].');  %'# Write the data to the file
fclose(fid);                                  %# Close the file

Answer 1

I believe the solutions is as simple as adding another vector to your fprintf output matrix. I've added the new, modifiedtime vector at the top as an example and added how to output the data with the fprintf statement.

a = [1; 2; 3; 4; 5];          %# Sample data
time = [10; 40; 20; 11; 40];  %# Sample data
c = [0; 1; 0; 0; 1];          %# Sample data
modifiedtime = [3, 4, 7, 1, 2]; %# new array 

index = find(c == 1);                %# Find indices where c equals 1
temp = time(index);                  %# Temporarily store the time values
time(index) = 0;                     %# Zero-out the time points
time(index-1) = time(index-1)+temp;  %# Add to the previous time points
c(index) = 0;                        %# Zero-out the entries of c

fid = fopen('newData.txt','wt');              %# Open the file
fprintf(fid,'%g\t %g\t %g\t %g\n',[a time c modifiedtime].');  %'# Write the data to the file
fclose(fid);