Generate input

I am trying to concatenate the numbers and create a vector of concat number with string format.

%[data, text, alldata] = xlsread('C:\Users\hze1\Desktop\Descrete Choice Models\final_file_b.xls','Data','A1:GG25831');
data = [2 4;1 12;23 121];
s = size(data);
%FIPS = zeros(s(1),1);
filename0=('C:\Users\hze1\Desktop\Descrete Choice Models\FIPS.dat');
for i=1:s(1)
if length( num2str(data(i,1)))<2
temp1 = strcat('0', num2str(data(i,1)))
else
temp1 = num2str(data(i,1))
end

if length( num2str(data(i,2)))<2
temp2 = strcat('00', num2str(data(i,2)))
elseif length( num2str(data(i,2)))== 2
temp2 = strcat('0', num2str(data(i,2)))
else
temp2 = num2str(data(i,2))
end

FIPS{i} = strcat(temp1 , temp2)

end

%result should be : [02004;01012;23121]

%save (filename0, 'FIPS', '-dat');