precise selection in a for loop

2015 7 17
1 个回答
更新时间：2021 8 20
2 次查看（30 天）

0 个投票

Hello, I just created a for loop and this is correct, but now I would only select positions from 30 to 48 for each "essai" but I am not sur how to do that whithout matrix size problem...
for essai = 1:length (nb_essai)
% for essai = 1:length (nb_essai)
num_ess = [];
num_ess = find (num(:,24) == essai);
Val_CursX_ess = num(num_ess,6);
Val_CursY_ess = num(num_ess,7);
Val_Quest_ess = txt(num_ess,36);
Val_Indice_ess = txt(num_ess,40);
Val_Valid_ess = txt(num_ess,33);

回答（1 个）

Walter Roberson
Walter Roberson 2015-7-17

1 个投票

After
num_ess = find (num(:,24) == essai);
add
num_ess = num_ess(num_ess >= 30 & num_ess <= 48);

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Alexandre Williot
Alexandre Williot 2015-7-17
编辑：Alexandre Williot 2015-7-17
Thank you ! But now I have this error message
??? Index exceeds matrix dimensions.
Error in ==> script_pour_mes_donnees_MO_exp2_TEST2_300ms at 86
if strcmp(Val_Indice_ess_Quest(1,:),'Neutre')==1
Because after the loop above I have another loop:
for ques = 1:2
Question_interet = Type_Questions{ques};
pos_question = find(strcmp(Question_interet,Val_Quest_ess) == 1);
Val_CursX_ess_Quest = Val_CursX_ess(pos_question,1);
Val_CursY_ess_Quest = Val_CursY_ess(pos_question,1);
Val_Quest_ess_Quest = Val_Quest_ess(pos_question,1);
Val_Indice_ess_Quest = Val_Indice_ess(pos_question,1);
Val_Valid_ess_Quest = Val_Valid_ess(pos_question,1);
if ques == 1
pos_ok = [];
pos_ok = find(strcmp('Semantique',Val_Indice_ess_Quest) == 0);
Val_Indice_ess_Quest = Val_Indice_ess_Quest(pos_ok,1);
Val_CursX_ess_Quest = Val_CursX_ess_Quest(pos_ok,1);
Val_CursY_ess_Quest = Val_CursY_ess_Quest(pos_ok,1);
Val_Quest_ess_Quest = Val_Quest_ess_Quest(pos_ok,1);
Val_Valid_ess_Quest = Val_Valid_ess_Quest(pos_ok,1);
% faut dégager les semantiques et conserver le reste
% --> créer un nouveau Val_Indice_ess_Quest
end
%-- Etat Indice -- Emo ou Neutre? --
% Code_Indice --> 1 pour Neutre
% Code_Indice --> 2 pour Emo
if strcmp(Val_Indice_ess_Quest(1,:),'Neutre')==1
code_Indice = 1;
elseif strcmp(Val_Indice_ess_Quest(1,:),'Emo')==1
code_Indice = 2;
else
code_Indice = 999;
end
if strcmp(Val_Valid_ess_Quest(1,:),'valide')==1
code_Vald = 1;
elseif strcmp(Val_Valid_ess_Quest(1,:),'invalide')==1
code_Vald = 2;
else
code_Vald = 999;
end
Walter Roberson
Walter Roberson 2015-7-18
I do not understand that code.
What is class(Question_interet) ? Is it character array or is it cell array of string?
Why are you using those strange find() on strcmp() instead of using the two-output version of ismember() ?
[found, idx] = ismember('string', Cell_Array_Of_Strings)
Alexandre Williot
Alexandre Williot 2015-7-18
Ok, things are in this manner because at the start I load lot of files and in these files my vector begins with the word 'semantique' or the word 'emotion'. So I needed to create a for loop with if. I don't know if I am clear but I try to be. Ask me again if not. And I didn't know the ismember function.
Type_Questions = {'Semantique' 'Emotion'};
thank you.
Walter Roberson
Walter Roberson 2015-7-18
Please rewrite your code using ismember()
Also please note that there is no need to test
strcmp() == 1
The result of strcmp() is true or false directly so you can leave out the "== 1" such as
if strcmp(A,B)
or
find(strcmp(A,B))
Alexandre Williot
Alexandre Williot 2015-7-19
Ok, tkank you, I will try but I do not think this is the origin of the problem of my matrix size, isn't it?
Walter Roberson
Walter Roberson 2015-7-19
Yes, it probably is.
Alexandre Williot
Alexandre Williot 2015-7-19
But the problem is on
Error in ==> script_pour_mes_donnees_MO_exp2_TEST2_300ms at 86
if strcmp(Val_Indice_ess_Quest(1,:),'Neutre')==1
and I test my script before the add of your line
num_ess = num_ess(num_ess >= 30 & num_ess <= 48);
and everything was ok before that ...
Walter Roberson
Walter Roberson 2015-7-19
Okay, so comment out that change of mine, rewrite the resulting version using ismember() and so on, and then uncomment the line and test the resulting code.
Alexandre Williot
Alexandre Williot 2015-7-19
I try something like this but in final I lost information about my 'code_indice'. Is it possible just te redefine the size of matrix num,txt,raw before?
for essai = 1:length (nb_essai)
% for essai = 1:length (nb_essai)
num_ess = [];
num_ess = find (num(:,24) == essai);
%num_ess = num_ess(num_ess >= 30 & num_ess <= 48);
Val_CursX_ess = num(num_ess,6);
Val_CursY_ess = num(num_ess,7);
Val_Quest_ess = txt(num_ess,36);
Val_Indice_ess = txt(num_ess,40);
Val_Valid_ess = txt(num_ess,33);
% pause
%== boucle Question ==
for ques = 1:2
Question_interet = Type_Questions{ques};
[pos_question, index] = ismember ('Semantique', Val_Quest_ess);
%pos_question = find(strcmp(Question_interet,Val_Quest_ess) == 1);
Val_CursX_ess_Quest = Val_CursX_ess(pos_question,1);
Val_CursY_ess_Quest = Val_CursY_ess(pos_question,1);
Val_Quest_ess_Quest = Val_Quest_ess(pos_question,1);
Val_Indice_ess_Quest = Val_Indice_ess(pos_question,1);
Val_Valid_ess_Quest = Val_Valid_ess(pos_question,1);
if ques == 1
pos_ok = [];
[pos_ok, index] = ismember ('Emotion', Val_Quest_ess);
%pos_ok = find(strcmp('Semantique',Val_Indice_ess_Quest) == 0);
Val_Indice_ess_Quest = Val_Indice_ess_Quest(pos_ok,1);
Val_CursX_ess_Quest = Val_CursX_ess_Quest(pos_ok,1);
Val_CursY_ess_Quest = Val_CursY_ess_Quest(pos_ok,1);
Val_Quest_ess_Quest = Val_Quest_ess_Quest(pos_ok,1);
Val_Valid_ess_Quest = Val_Valid_ess_Quest(pos_ok,1);
% faut dégager les semantiques et conserver le reste
% --> créer un nouveau Val_Indice_ess_Quest
end
%-- Etat Indice -- Emo ou Neutre? --
% Code_Indice --> 1 pour Neutre
% Code_Indice --> 2 pour Emo
if strcmp(Val_Indice_ess_Quest(1,:),'Neutre')==1
code_Indice = 1;
elseif strcmp(Val_Indice_ess_Quest(1,:),'Emo')==1
code_Indice = 2;
else
code_Indice = 999;
end
if strcmp(Val_Valid_ess_Quest(1,:),'valide')==1
code_Vald = 1;
elseif strcmp(Val_Valid_ess_Quest(1,:),'invalide')==1
code_Vald = 2;
else
code_Vald = 999;
end
Alexandre Williot
Alexandre Williot 2015-7-19
Maybe, it could be easier if I join the script and a file for run the script for my data

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