loop over a list of numbers

I would like to run a loop over a list of numbers like {3,6,18}. Please advise.

Answer 1

[Star Strider]

The loop, if one is appropriate, depends on what you want to do.

This is an example of how to address them:

numlist = {3,6,18};
for k1 = 1:length(numlist)
    fprintf('Number at position %d = %6.2f\n', k1, numlist{k1})
end

Answer 2

[Muhammad Asad]

for i = [3, 6,18]
%do something
end

[Raphaël Nussbaumer]

Just a note for those of you that make the same mistake. the list needs to be row vector and it doesn't work with column vector such as:

for i = [3, 6,18]'

%do something

end

Answer 3

[Walter Roberson]

for K=[3, 6,18]

Note: you will find that often you turn out to need a different structure,

kvals =  [3,6,18];
numk = length(kvals);
results = zeros(1, numk);
for kidx = 1 : numk
  K = kvals(kidx) ;
 ....  
  results(kidx) =.... 
end

You would need this kind of structure when you need one output for each of the different values.

[alpedhuez]

Thank you.

Answer 4

[Shivani Dixit]

For looping over each element of an array or list , you can use for loop or while loop according to convenience. Simply using a for loop would answer your question.

given_array=[3,6,18];
len =length(given_array)
for i=1:len
 % some operation here or access the array elements using given_array(i)
end

You can leverage the documentation for loops using

https://www.mathworks.com/help/matlab/matlab_prog/loop-control-statements.html?s_tid=gn_loc_drop