a couple of question

Hi all, I have a couple of question. I would appreciate if somebody replies me. The mentioned questions are as below:

1: I want to define all variables of my program as 'Integer ' ones in the way they occupy minimal memory. I used the 'unit8' or 'int8' commands but they don't work properly and I encountered some errors. How can I define for example variable's' as the integer one in the following program?

    clear; clc; tic; 
    ns=10;
    s_min= 200; 
    s_max= 1450; 
    s=floor ([s_min:(s_max-s_min)/(ns-1):s_max]);
    toc

2:I have some varias e.g. "s2, tsd, etc' . I want to preallocate them befor using in the main program like below.

clc; clear; tic; 
T=12; ns=10; big_num=10000; nq=23; nr=20; 

s2=cell(T,ns); 
tsd=cell(T,ns);

r_opt=cell(big_num,ns);
tsd_total=r_opt;
fmin_init=cell(big_num,1);
tsd_intrpln=cell(big_num,nq);

for n=1:big_num
    for ss=1:ns
    if  n<=T; t=n; s2{t,ss}=ones(nq,nr)*8888; sd{t,ss}=ones(nq,nr)*88888; end
        r_opt{n,ss}=repmat(88888888,nq,nr);
        tsd_total{n,ss}= r_opt{n,ss};
    end

      fmin_init{n,1}= repmat(88888888,ns,nq);

      for qq=1:nq
          tsd_intrpln{n,qq}=repmat(88888888,nq,nr);
      end
  end
  toc

In your idea how can I do it using minimum or without any for loops?

3: I have a very time-consuming program. I want to alarm me whenever the running has been finished. I used "beep on" command and turned on the speaker, but it doesn't work. Can you help me?

Answer 1

[Image Analyst]

For question 1, to create an array of all ones:

 s=ones(1, ns, 'uint8')

I'm not sure what your s is doing - it's creating a ramp, which is not creating an array of all integer 1's like you want. Creating a ramp is better done by linspace(). Maybe you want to threshold, something like

s = linspace(s_min, s_max, 9) % Easier way than how you made s.
sOnes = uint8(s > 800) % Threshold and cast to uint8