MATLAB: How to run a for loop for a varying no. of times in matlab

variable sized for loop

Hi everyone. I need your help again. Is there any way to run a for loop for suppose k no. of times where the value of k is changing with each iteration of the loop??

Suppose the program is:

 n=7; %fixed
 k=0;
 for i=1:n+k
  statements;
  statements;
 if(condition is true)
 k=k+1;
 end
end

The loop is being executed for n times even if condition is true and k gets incremented. But I want the loop to run for n+k no. of times. Is it possible? Is there any workaround?? Please help! Thanx in advance!!

Best Answer

You can use while loop something like this:

 n=7; %fixed
 k=0;
val_flag = 0;
 while (val_flag < n+k)
  statements;
  statements;
 if(condition is true)
 k=k+1;
 val_flag = val_flag + 1;
 end
end

Related Solutions

MATLAB: Concatenating an output matrix within inner and outer loops

Hi,

In case you only want to break the inner for loop, you can try it this way

output=[];
k = 1;
for z = 1:10;
  in1 = input1(k);
  in2 = input2(k);
  v=1; 
  for t = 0:0.1:5;  % length of vector t can be varied so allow limit to be

    % met in each inner loop

    % calculations using in1 and in2 from outer loop

    var1(v,k) = a;
    var2(v,k) = b;
    out = [a b];
    limit = norm(out - in1);
    if limit < a 
        break;
    end
    output = [output; out]; % appending data to output matrix

    v=v+1;
  end
  z=z+1
end

In case you want to break both the inner and outer for loops, you can try it this way

output=[];
k = 1;
flag=0;
for z = 1:10;
  in1 = input1(k);
  in2 = input2(k);
  v=1;
  for t = 0:0.1:5;  % length of vector t can be varied so allow limit to be
    % met in each inner loop
    % calculations using in1 and in2 from outer loop
    var1(v,k) = a;
    var2(v,k) = b;
    out = [a b];
    limit = norm(out - in1);
    if limit < a 
        flag=1;
        break; % to break inner loop
    end
    output = [output; out]; % appending data to output matrix
    v=v+1;
  end
  if flag
      break; to break outer loop
  end
  z=z+1
end

You need not increment z after inner for loop since it gets incremented by 1 in the outer for loop every time it runs. In case you want z to increment by n (number other than 1), you can write it as ‘for z=1:n:10’

MATLAB: Setting up vector function

In your for loop, you are using k(k1+1). if k1 is the last element of k, then k(k1+1) will be exceeding the dimension of k. If you dont care about the last term, use

 for k1 = 1:n-1
     ... Stuff ...
 end
 d(n) = k(n);

or if you need the other vectors to go to n, stick it in a conditional

 for k1 = 1:n
     ... Other Stuff ...
     if k1~=n
         d = (k(k1)+k(k1+1))*ones(n,1);
     end
 end

Best Answer

Related Solutions

MATLAB: Concatenating an output matrix within inner and outer loops

MATLAB: Setting up vector function

Related Question