When i execute function my matlab is being struck; is there any wrong with this simple code???

     In the following arr is a array(1-d) in which each row has three columns of 
  x-co-ordinate , y-co-ordinate and intensity values ;
  m*n is the required size of output image ie fgt here.
  In the code initially i have simply assigned all values to 65539(which is not  in range of uint16)

function [fgt]= reconstruct ( arr,m,n)
  fgt=zeros(m,n);
  fgt(:,:)=65539; % 
  l=size(arr,2)-2;
  for i=1:l
      fgt(arr(i),arr(i+1))=arr(i+2);
      i=i+3;
  end
  for i=1:m
      for j=1:n
          if(fgt(i,j)==65539)
              fgt(i,j)=0;
          end
      end
  end

Answer 1

[Azzi Abdelmalek]

If arr is a real array, then there will be a problem with fgt(arr(i),arr(i+1))

[nayana]

whats the problem, arr is real array..

[Azzi Abdelmalek]

In Matlab, indices must be a real positive integers or logicals

try

a=1:5
a(1.5)

[nayana]

I mean arr has only positive integers, not complex .arr contains just the co-ordinates and intensity values which are purely integers to my knowledge

[Azzi Abdelmalek]

Ok, what are error messages?

[nayana]

there are no error messages, its getting struck and every time this occurs i need to shutdown and restart again

[Azzi Abdelmalek]

I tested your code, there is no problem,

arr=randi(10,8,3)
m=8,n=3;
fgt=zeros(m,n);
fgt(:,:)=65539; % 
l=size(arr,2)-2;
for i=1:l
    fgt(arr(i),arr(i+1))=arr(i+2);
    i=i+3;
end
for i=1:m
    for j=1:n
        if(fgt(i,j)==65539)
            fgt(i,j)=0;
        end
    end
end

[nayana]

Thank you for your immediate response, maybe there's something wrong with my mat lab software.I will re install and see

Answer 2

[Walter Roberson]

Please do not use "l" as a variable name: it is too easy to confuse it with "1".

You have

for i=1:l
  i=i+3
end

changing a loop variable inside of the "for" loop has an effect only until the beginning of the next loop iteration. If you want to increment by 3's, then use

for i = 1 : 3 : l

[nayana]

Thanks a lot for your help !!! I have modified it.