extract the words from audio file

i want to extract the words from audio recorded in matlab and save each word in seperate audio file, i have problem, i extract the first word but the middle word cannot extracted here is my code:

Fs = 44100 ; 
nBits = 16 ; 
nChannels = 2 ; 
ID = -1; % default audio input device 
recObj = audiorecorder(Fs,nBits,nChannels,ID); 
disp('Start speaking.') 
recordblocking(recObj,5);
disp('End of Recording.'); 
play(recObj);  
audiosaved=getaudiodata(recObj); 
audiowrite('C:\Users\rasha\Desktop\slide\mms\MMS\hw\recoder.wav',audiosaved,Fs);  
[p1,Fs]=audioread('C:\Users\rasha\Desktop\slide\mms\MMS\hw\recoder.wav'); 
q=44100;
part1=p1(1:q*1.5,:);  
part2=p1(1.5:q*2.5, :); 
part3=p1(2.5:q*3,end, :);
audiowrite('C:\Users\rasha\Desktop\slide\mms\MMS\hw\part1.wav',part1,Fs); 

audiowrite('C:\Users\rasha\Desktop\slide\mms\MMS\hw\part2.wav',part2,Fs); 

audiowrite('C:\Users\rasha\Desktop\slide\mms\MMS\hw\part3.wav',part3,Fs);

Answer 1

[Walter Roberson]

part1=p1(1:floor(q*1.5),:);  
part2=p1(ceil(1.5*q):floor(q*2.5), :); 
part3=p1(ceil(2.5*q):floor(q*3),end, :);

[Rasha Ahmad]

Walter Roberson

Thanks you very much but can you explain what do you mean in floor and ceil ??

[Walter Roberson]

floor(x) returns the greatest integer less than or equal to x. ceil(x) returns the least integer greater than or equal to x.

In other words floor "rounds down" and ceil "rounds up".

[Walter Roberson]

I realized that there is a subtle boundary condition problem with what I posted. Repaired would be

part1=p1(1:floor(q*1.5),:);  
part2=p1(floor(1.5*q)+1:floor(q*2.5),:); 
part3=p1(floor(2.5*q)+1:floor(q*3),:);