Loop order/ assignement

Hello,

I am writing a loop say : for i=1:9;

Suppose I am in the 5th iteration

if certain conditions of my If else statement are met, then I want my next loop to start from iteration nbr5 not from i=6.

82  4.405517686  6.551066224  8.37093675  9.377805584
70  3.549776369  5.46044706  7.393870673  8.899016011
41  3.925365061  6.109160353  8.117877657  9.186700016
85  3.258680565  5.152732852  7.091023754  8.418727381
99  4.047440897  6.097040296  7.774985958  8.495417896 ( 5th row: i=5).

so in i+1= 6, I want my loop to actually still start from i=5 ( 5th row),

is this even possible in Matlab?

can someone PLEASE help??

Answer 1

[Walter Roberson]

No. You will need to switch from using a "for" loop to using a "while" loop.

(There are also some ways of writing it that involve putting a while loop within the for loop.)

[Amine Ben Ayara]

Hello Walter, Thank you for your reply. Just just to clarify, If I write for loop: for i=1:6 or 7, the while loop goes it right below it? for i=1:6

[Walter Roberson]

Two forms:

i = 1;
while i <= 9
  ... do something ...
  if conditions are *not* met
    i = i + 1;
  end
end

or

for i = 1 : 9
   loop_again = false;
   while loop_again
     ... do something ...
     if conditions are met
       loop_again = true;
     end
   end
 end

The first of those obviously takes less code. It also has the possibility of going backwards by subtracting from i.