I have to seperate a list of words into two conditions(each containing 10 words), take 5 words randomly from each condition, and display them. Please help. I've provided the code I have so far.

The problem I am having is being able to put them back together and randomly show five from each condition.

 Words=textread( '20highlow.txt' , '%s' , 'delimiter' , '\t' );%opens a txt file
 Condition1HF = Words(1:10);
 total_wordsHF = (length(Condition1HF)/2)%this is the total number of words 
%  total_wordsHF = 5
%  rand_orderHF = randperm(total_wordsHF)
%  listlengthHF=length(rand_orderHF)
%  listlengthHF=5 
%  
%  for i = 1: listlengthHF; %displays words
%     stimulus = char(Condition1HF(rand_orderHF(i)));%Randomize Words
%     char(Condition1HF(i));%; suppresses whole output
%  end   

 Condition2LF = Words(11:20);
 total_wordsLF = (length(Condition2LF)/2) %this is the total number of words 
%  total_wordsLF = 5
%  rand_orderLF = randperm(total_wordsLF);
%  listlengthLF=length(rand_orderLF);
%  listlengthLF=5;
% 
% for i = 1: listlengthLF; %displays words
%     stimulus2 = char(Condition2LF(rand_orderLF(i)));%Randomize Words
%     char(Condition2LF(i));%; suppresses whole output
% end  

 Conditions = ([Condition1HF ; Condition2LF])
 total_words = [total_wordsHF ; total_wordsLF]
 rand_order = randperm(total_words)
 listlength=length(rand_order)
% total_words = length(Conditions);
% rand_order = randperm(total_words);
% listlength=length(rand_order);
% listlength=10;

 for i = 1: listlength; %displays words
    set(buttons, 'visible', 'on'); %Turn on Buttons
    typing = 0;
    press  = 0; 
    stimulus = char(Conditions(rand_order(i)));%Randomize Words
    t2= text(.4,.5,stimulus);
    axis('off');
    set(f1,'color','w')
    char(Words(i));%; suppresses whole output
    set(gcf,'UserData',0);
    while press == 0; %wait for participant to click continue
    pause( 0.1 );
    typing = get( gcf , 'UserData' );

          if typing > 0; %participant has clicked 1
            press = 1;    
          end
    end
    %pause(1);
    delete(t2) 

    listofresponses(i)=typing;
    fprintf(fid, '%s\t%d\t%d\r\n' ,M , i, listofresponses(i));
    %listofresponses(i, 2)=PPressed;

Answer 1

[Fangjun Jiang]

If you want to choose 5 works out of 10 randomly, use this:

Words=cellstr(('a':'j')');
index=randperm(10);
index=index(1:5);
ChosenWords=Words(index)

[Iiona]

I am able to do that for instance with the commented code I have above:

Condition1HF = Words(1:10);

total_wordsHF = length(Condition1HF)

rand_orderHF = randperm(total_wordsHF)

listlengthHF=length(rand_orderHF)

listlengthHF=5

but this is just for one condition and I can do it for the other. My problem is putting them back together and having all 10 words (five from each) shown.

[Fangjun Jiang]

Words1={'ab,'b','c'};

Words2={'jfdsa','aksjd'};

AllWords=[Words1,Words2];

[Fangjun Jiang]

The function form of the concatenation is horzcat() or vertcat().