Help with for loop indexing

Hey, I'm trying to figure this question in Cody Coursework out where I'm given a string in as an input and I'm supposed to delete all of the extra spaces and words with two or less letters within them. So for example, ' he who sees and he who is not ' should be : 'who sees and who not' I think the problem is that I shouldn't run the for loop to a variable that is changing within the loop, but I'm unsure as to what to do to it. The assignment is due in 40 mins so I don't know if anyone will be able to help, but for what it's worth here it is:

function outStr = remove_small_words(inStr)
c1 = 1;
str = strtrim(inStr);
endS = numel(str);
for c1 = 1:endS
    while c1 ~= endS
        if (str(c1) == char(32) && str(c1+1) == char(32))
            str(c1) = [];
            c1 = c1 - 1;
        elseif (str(c1) == char(32) && str(c1+2) == char(32))
            str(c1+2) = [];
            str(c1+1) = [];
            c1 = c1 - 1;
        elseif (str(c1) == char(32) && str(c1+3) == char(32))
            str(c1+3) = [];
            str(c1+2) = [];
            str(c1+1) = [];
            c1 = c1 - 2;
        elseif (str(c1) == endS - 2)
            break
        end
    c1 = c1 + 1;
end
outStr = str;
end

Any help is appreciated, thanks

Answer 1

[Andrei Bobrov]

st = ' he who sees and he who is not ';
a = regexp(st,'\w*','match');
outStr = strjoin(a(cellfun(@numel,a)>2),' ');