Need help with string counting
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Ricardas Gudonavicius
il 4 Mar 2020
Modificato: Stephen23
il 4 Mar 2020
Hello. I have problem with counting string.
First of all, I need to count how many i have letters in word (using this):
prompt='Iveskite raide/zodi-';
str=input(prompt,'s');
gauto_zodio_ilgis=length(str);
Second, I write to command window LABAS
My all arrays:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/275019/image.png)
My code:
dydis=0;
prompt='Iveskite raide/zodi-';
str=input(prompt,'s');
gauto_zodio_ilgis=length(str);
% for sk=1:gauto_zodio_ilgis
if strfind(str,'A')
dydis = dydis + length(A);
end
if strfind(str,'B')
dydis = dydis + length(B);
end
if strfind(str,'C')
dydis = dydis + length(C);
end
if strfind(str,'D')
dydis = dydis + length(D);
end
if strfind(str,'E')
dydis = dydis + length(E);
end
if strfind(str,'F')
dydis = dydis + length(F);
end
if strfind(str,'G')
dydis = dydis + length(G);
end
if strfind(str,'H')
dydis = dydis + length(H);
end
if strfind(str,'I')
dydis = dydis + length(I);
end
if strfind(str,'J')
dydis = dydis + length(J);
end
if strfind(str,'K')
dydis = dydis + length(K);
end
if strfind(str,'L')
dydis = dydis + length(L);
end
if strfind(str,'M')
dydis = dydis + length(M);
end
if strfind(str,'N')
dydis = dydis + length(N);
end
if strfind(str,'O')
dydis = dydis + length(O);
end
if strfind(str,'P')
dydis = dydis + length(P);
end
if strfind(str,'Q')
dydis = dydis + length(Q);
end
if strfind(str,'R')
dydis = dydis + length(R);
end
if strfind(str,'S')
dydis = dydis + length(S);
end
if strfind(str,'T')
dydis = dydis + length(T);
end
if strfind(str,'U')
dydis = dydis + length(U);
end
if strfind(str,'V')
dydis = dydis + length(V);
end
if strfind(str,'W')
dydis = dydis + length(W);
end
if strfind(str,'X')
dydis = dydis + length(X);
end
if strfind(str,'Y')
dydis = dydis + length(Y);
end
if strfind(str,'Z')
dydis = dydis + length(Z);
end
I get answer dydis = 140000, but by my counting I have to get 165000
HOW TO I NEED TO CHANGE MY CODE???
Thanks for any help
1 Commento
Risposta accettata
Jamuna
il 4 Mar 2020
update your code of if statements with
for ii=1:26
if strfind(str,char(ii+64))
dydis = dydis + length(eval(char(ii+64)))*numel(strfind(str,char(ii+64)));
end
end
this should give you right answer
2 Commenti
Stephen23
il 4 Mar 2020
Or write simpler and more efficient code which avoids evil eval entirely, such as that shown by KSSV here:
Più risposte (2)
Constantino Carlos Reyes-Aldasoro
il 4 Mar 2020
Perhaps the error is here:
if strfind(str,'A')
dydis = dydis + length(A);
end
You are detecting the character 'A' but then you are finding the length of a variable called 'A'. Try like this
A_inString = strfind(str,'A');
if ~isempty(A_inString)
dydis = dydis + length(A_inString);
end
You save the output of the find in a variable, and then if it is not empty, then you add the length of the strfind.
Hope this helps. If this solves the problem, please accept the answer. If not, let me know.
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