Need help with string counting
显示 更早的评论
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:
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 个评论
You should read this:
and then follow KSSV's advice.
Or use a table.
Or a structure.
Whatever you do, do NOT write slow, complex, buggy code using evil eval.
采纳的回答
Jamuna
2020-3-4
0 个投票
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 个评论
Stephen23
2020-3-4
Or write simpler and more efficient code which avoids evil eval entirely, such as that shown by KSSV here:
Ricardas Gudonavicius
2020-3-4
更多回答（2 个）
You have made your code very lengthy......you should follow like this.
S = {'A','B',.....'Z'} ; % write all the letters
dydis=0;
for i = 1:length(S)
W = strfind(str,S{i}) ;
dydis = dydis + length(W);
end
Constantino Carlos Reyes-Aldasoro
2020-3-4
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.
类别
在 帮助中心 和 File Exchange 中查找有关 Image Arithmetic 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
