checking character by for loop

Hi guys,

I want to do that;

script = 'hi I am jo*hn' or ' hi I am jo3hn' (for=5per group)

(I have done for perfect string without noncharecter but I have to write version of that non-charecter entried. Program has to stop for loop when program see noncharacter.)

output=

Hiiam

Jo---

text='hi I am jo*hn'


for control=1:length(text1)
    
   if text1(control) == '[^a-z]'
       
       text1=text1(1:(control-1));
       
   end
end

You do not have to edit printing section. I need only restrict text1 until program see a noncharacter.

[Geoff Hayes]

Ugur - what is the intent of this code?

   if text1(control) == '[^a-z]'
       
       text1=text1(1:(control-1));
       
   end

Why reset text1 to some subset of characters? I guess what I would like to know is what output are you looking for? Do you need to use a for loop? As for your condition, perhaps you are trying to exit if the character is not one of a-z (or A-Z). If that is the case then try,

for control=1:length(text1)
   if ~isempty(regexpi(text1(control),'[^a-z]'))
       text1=text1(1:(control-1));
       break;
   end
end   

which "works" though it will exit/break on space characters too. To allow space characters just change your expression to '[^a-z\s]'.

[Ugur Sahin]

Yes I am trying to do that but could you write without isempty() and regexpi() function if it is possible ?

[Geoff Hayes]

You had started using '[^a-z]' so I assumed that you were trying to use a regexp or regexpi. Is this not the case?

[Ugur Sahin]

yes bu I do not have to use isempty i guess ?

[Walter Roberson]

~ismember(text1(control), list_of_permitted_characters)

Answer 1

[Swaroopa]

Hi Ugur Sahin,

You can use isLetter(A) function in the MATLAB.

text1='hi I am jo*hn'
for control=1:length(text1)
    if isletter(text1(control))==0
        if text1(control)~=' '
            text=text1(1:(control-1));
            break;
        end  
    end
end
text1=text

Refer to the below documentation for more information:

Determine which characters are letters - MATLAB isletter (mathworks.com)

Hope this helps.