How I can fix "Matrix dimension must be agree"

A = importdata('msm_19-1250.txt');
d1=A(:,2);
phi1=A(:,3);
theta1=A(:,4);
B = importdata('msm_19-251500.txt');
d2=B(:,2);
phi2=B(:,3);
theta2=B(:,4);
phi2to1 = phi2 - 200;
theta2to1 = (-1)*theta2 + 400;
C = [d1 phi1 theta1];
D = [d2 phi2to1 theta2to1];
E = [C ; D];
M = mean(E);
R = E - M;
SD = std(E);
F = E(:,1);
histogram(F);
hold on;
line([50.33 50.33], [0 120],'color','y');
line([50.3000 50.3000], [0 120],'color','r');
hold off;
figure;
hold on;
G = R(:,2);
histogram(G);
hold off;
% Part d
figure;
hold on;
H = R(:,3);
histogram(H);
line([0.0025 0.0025], [0 100],'color','g');
line([-0.0025 -0.0025], [0 100],'color','g');
line([0.0050 0.0050], [0 100],'color','y');
line([-0.0050 -0.0050], [0 100],'color','y');
line([0.0075 0.0075], [0 100],'color','r');
line([-0.0075 -0.0075], [0 100],'color','r');
hold off;
%Part f
K = (C + D)/2;
Average = K(:,2);

[Rik]

By making sure the dimensions of the arrays your are processing are compatible. Since you don't provide input files, nor any information about where your error occurs, it is difficult to give you a more meaningful answer.

[Alex Mcaulley]

Please, upload the full error message

[Haider Ali]

I have uploaded the both .txt files

[Alex Mcaulley]

The code works for me

[Rik]

'Answer' by Haider Ali moved to comment section:

But it shows error to me. I have matlab 2014. Does it makes any difference?

Answer 1

[Rik]

Your error is due to the sizes not matching. This can be solved using implicit expansions, which is automatically enabled since R2016b. Consider the sizes of the variables in each step below:

var1 = [494,395,516,434,476,557,413,442,650,433,417,656,267,478,178,423,427];
var2 = [512,430,520,428,500,600,364,380,658,445,432,626,260,477,259,350,451];
E = [var1;var2];%size(E)=2x17
M = mean(E);%size(M)=1x17

%with implicit expansion:
R = E - M;%size(R)=2x17

This is because E is expanded to fit the size of M. Pre-R2016b you have to explicitly tell Matlab to use implicit expansion.

R=bsxfun(@minus,E,M);