Improper assignment with rectangular empty matrix.

Hi!

I am trying to find out what causes that error. Can anybody give me an idea? Thats my code.

clc;

clear all;

close all;

filename='DOE_Chrysler.xls';

sheet=1;

x1=xlsread(filename,'D4:D28');

x2=xlsread(filename,'E4:E28');

x3=xlsread(filename,'F4:F28');

for i=1:9

      for j=1:9;

          D(i,j)=sqrt((x1(i)-x1(j))^2+(x2(i)-x2(j))^2+(x3(i)-x3(j))^2);

      end

end

for i=1:9;

          Min(i)=min(D(i,(i+1):9));

end

D is a symmetric matrix with zeros in the diagonal. I want the minimum values of each row or column of the half matrix because is symmetric by excluding also the diagonal elements which are zero. That is what i am trying to do. Thank you in advance!

[Image Analyst]

You forgot to attach 'DOE_Chrysler.xls'. And don't double space your code. Single space it, then highlight and click the {}Code button. Please edit and fix your posting.

Answer 1

[Walter Roberson]

Look at your lines

for i=1:9;
          Min(i)=min(D(i,(i+1):9));
end

When i becomes 9 in your loop, then you attempt to take D(9, (9+1):9) which is D(9,10:9) which is going to be the empty matrix because 10:9 gives the empty vector. You then apply min() to the empty vector, getting out an empty vector. You try to assign that empty vector into a definite location Min(i) .