getting error" Index exceeds matrix dimensions."

Hi All I getting error "Index exceeds matrix dimensions." after till element 60623 my code is running fine but after this I am getting above mention error code:-

if true
  Data = xlsread('primary school data.xlsx');
k = Data(:,3);
infectednodes = zeros(1,242);
for time = 1:5846
  m = find(k==time)
%    for l = 1:1:size(infectednodes,1)
     for i = m(1):m(end)
         if Data(i,1)== 59
             infectednodes(i,1) = Data(i,2);
         elseif Data(i,1)== infectednodes
            infectednodes(i,1) = Data(i,2);
         else
             break;
         end 
     end
      infectednodes = unique(infectednodes);
%    end
end

end

error:- m =

0×1 empty double column vector

Index exceeds matrix dimensions.

Error in Q9 (line 8) for i = m(1):m(end)

Thanks in advance

Answer 1

[Walter Roberson]

Your code assumes that there is at least one entry in column 3 for every time in the range 1 to 5846. However, at least one of those values is not present, so

   m = find(k==time)

is returning the empty vector. You should probably replace

       for i = m(1):m(end)

with

       for i = m

[kumar navneet]

Thanks for the reply.