Need help finding a moving average

I'm trying to determine the moving average of a file with several columns. Each column is a separate data set and I want to find a moving average of each data set. I can't seem to figure out how to deal with each column by itself, so I basically append each data set ontop of each other and make a very large single string of values, and deal with it that way. I nkow this isn't the best way to do this, but that's what my code does now. Once that's done (which my code successfully does), I want to extract the values from this large string and rearrange it into columns again. I'm having trouble doing this...my code is as follows

function [absorbance_MA] = co2_quantify(wave_number, absorbance_co2blcorr);
numFiles = 5;
n = 100; %defines period of moving average
for i = n:numFiles*length(absorbance_co2blcorr)-n
  absorbance_MA_bl(i) = mean(absorbance_co2blcorr(i:i+n));
end
for i = 0:numFiles-1
  absorbance_MA(:,i+1) = absorbance_MA_bl(length(absorbance_co2blcorr)*i+1:length(absorbance_co2blcorr)*(i+1)-n)';
end

Any help is appreciated. I've attached the relevant files needed to run the code.

Answer 1

[Rick Rosson]

   n = 100;
   b = ones(1,n)/n;
   a = 1;

   absorbance_MA = filter(b,a,absorbance_co2blcorr);

[Nicholas Frank]

Thanks Rick!