how will I replace a string with another string without using strrep?

function newstring = replace_tags(readstring,tag,replacement);
newstring = "";
r_s=lower(readstring);
i= strfind(r_s,tag);
tg=i+length(tag);
final=readstring(i:tg)
end

This is my code so far.

[Walter Roberson]

Continued at https://www.mathworks.com/matlabcentral/answers/494456-how-can-i-replace-the-tag-with-the-given-replacement-without-using-strrep

Answer 1

[Bhaskar R]

Can I use regexprep command ??, If yes

function newstring = replace_tags(readstring,tag,replacement)
    r_s=lower(readstring);
    % By regular expression
    newstring = regexprep(r_s, tag, replacement); % you can do lot of stuff by this
end

Answer 2

[Erivelton Gualter]

If you still want to keep your line of thought instead of using Bhaskar approach, which is simpler, you can:

% Example entries
readstring = 'This is a good example';
tag = 'good';
replacement = 'great';

% Test
newstring = replace_tags(readstring,tag,replacement)

% Function
function newstring = replace_tags(readstring, tag, replacement)
i = strfind(lower(readstring),tag);
tg = i+length(tag);
newstring = [readstring(1:i-1), replacement, readstring(tg:end)];
end