Turining individual element to a matrix

I wrote a function to accept an excel file (file attached) and to find from the temperature column (20:5:71)+- 0.05 and take the mean of the corresponding viscosity value; such that it will return 20 = xxx, 25 = xyxy.

I have 12 columns, in pair of temp and viscosity it is 6 columns (see attached file)

My function return the results correctly, but i need to put the results back into a matrix form so that i can write it into an excel sheet for further processing.

My code is:

 function extract_viscosity
% This function extracts the viscosity at some designated temperature 
% and return the temperature and average viscosity.
clc

 filename = input('Enter an Excel file name: ','s');
 [ri,header] = xlsread ([filename '.xls']);
% ask = input ('input file name', 's');

 [~, col] = size(ri);
% mycell= repmat({NaN},size(ri));
% mycell= repmat({NaN},18);
% display (mycell);

 A = [-0.05,-0.04,-0.03,-0.02,-0.01,0,0.01,0.02,0.03,0.04,0.05];
 B = [20,25,30,35,40,45,50,55,60,65,70];
 k=0;
 for i = 1:1:11;
    C = B(i) + A;
    %display (C);

    for t = 1:3:col;
        col1 = ri(:,t);
        col2 = ri(:,t+1);
        solution = arrayfun(@(x) col2(find(col1== x,1,'first')),C','UniformOutput', false);
        cmsolution =  mean(cell2mat(solution));
        stdeviation = std(cell2mat(solution));
%         mymatrix(1:length(solution), t:t+1)= solution;
%         cellconcat = cat(mycell', cmsolution);
        display (mean(C'));
        display (cmsolution);
        display (stdeviation);

    end
 end

PLEASE SEE EXPECTED RESULT FORMAT IN THE SECOND SHEET (sheet name is result file) OF THE EXCEL FILE PROVIDED.

THANKS FOR ASSISTING!

Saheed.