Determine less than in for loop

I have a problem with my for loop. I would like to determine if a value in the loop is less than the previous value and then change the value if so.

for ii = (1:length(sz));
   z(ii);
   
   if z(ii+1) < z(ii)
      z = 180-z;
   end
   z
end

I get the error "Index exceeds the number of array elements (7)." at the if statement.

i know what it means but can not see a way to avoid it.

Answer 1

[Mathieu NOE]

hello

does that reflect what you wanted to do ?

clc
clearvars
% x = round(100*rand(1,10));
x =  [11    96     0    77    82    87     8    40    26    80];
z = x ;
for ii = (1:length(z)-1)  % change the last iteration value : length(z)-1 and not length(z)
%    z(ii);
   
   if z(ii+1) < z(ii)
%       z = 180-z; % this will modify the entire z vector
      z(ii+1) = 180-z(ii+1); % this will modify the current z value only (my guess)
   end
%    z
end

[Alexander Madsen]

Thanks alot, it works

[Mathieu NOE]

My pleasure