precise selection in a for loop

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);

Answer 1

[Walter Roberson]

After

num_ess = find (num(:,24) == essai);

add

num_ess = num_ess(num_ess >= 30 & num_ess <= 48);

[Alexandre Williot]

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]

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]

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]

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]

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]

Yes, it probably is.

[Alexandre Williot]

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]

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]

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]

Maybe, it could be easier if I join the script and a file for run the script for my data