guys i am attaching problem....
and please while doing coding in matlab don't use special functions like functions to find maximum amplitude out of array ....
waiting for reply if you have time

 

But i still want more optimized coding of c++ and also matlab guys reply


Attaching my own solution

 

you are more likely to get a response if you actually list the code and as I'm in a good mood at the moment I'll do it for you

  #include <iostream>
  using namespace std;
  
  int main()
  {
                  cout<< "*** CALCULATING AMPLITUDE, FREQUENCY AND PHASE OF A SINE WAVE ***"<<endl<<endl;
  
  //INPUT
                  float a[15],amp;
                  int i,j;
                  cout<<"Input the 16 samples"<<endl<<endl;
                  for (i=0; i<16; i++)
                  {
                                  cin>>a;
                  }
  
  
  //AMPLITUDE
  
                  amp=a[0];
                  for (j=0; j<15; j++)
                  {
                                  if (a[j]<a[j+1])
                                  {
                                                  amp=a[j+1];
                                  }
                  }
                  cout<<endl<<"The amplitude is :"<<amp<<endl<<endl;
  
  
  //FREQUENCY
  
                  int n=1;
                  float reg_a, reg_b, reg_c, reg_d, frequency, count=0;;
  
                  reg_a=a[0];
                  reg_b=a[1];
  
                  if(reg_a<reg_b)
                  {
  again1:
                                  reg_a=reg_b;
                                  n++;
                                  reg_b=a[n];
  
                                  if (reg_b>reg_a)                                  
                                                  goto again1;
                                  else 
                                  {
                                                  reg_d=reg_b;
  again2:
                                                  reg_c=reg_d;
                                                  n++;
                                                  reg_d=a[n];
                                                  count++;
                                                  if (reg_d<reg_c)
                                                                  goto again2;
                                                  else goto end;
                                  }
                  }
                  else
                  {
  again3:
                                  reg_a=reg_b;
                                  n++;
                                  reg_b=a[n];
                                  if (reg_b<reg_a)                                  
                                                  goto again3;
                                  else 
                                  {
                                                  reg_d=reg_b;
  again4:
                                                  reg_c=reg_d;
                                                  n++;
                                                  reg_d=a[n];
                                                  count++;
                                                  if (reg_d>reg_c)
                                                                  goto again4;
                                                  else goto end;
                                  }
                  }
  
  end:
                  count=count*2;
                  frequency=(1/(count/1000));
                  cout<<endl<<"The frequency is :"<<frequency<<" Hz"<<endl<<endl;
  
  
  //PHASE
  
                  float a0, a1, a2, a3, a4, phase;
                  a0=amp;
                  a1=a[0];
                  a2=(a1/a0);
                  a3=(a2 * a2 * a2);
                  a4=(a3 * a2 * a2);
                  phase=a2 + (a3/6) + ((3*a4)/40);
                  cout<<endl<<"The phase is :"<<phase<<" radians"<<endl<<endl;
  
  
                  return 0;
  }
  

 

yes i want my this c++ code to be more optimized as a better solution.
and also i want you guys to help me in creating matlab code as i am new on matlab anyone if have time help me and tell me how to take a start any sample code for finding anyone of the above asked tasks so that i can understand( tell me both about special functions and creating my own logic e.g maxampl(array); and finding it otherwise)

 

guys i did somehow a little effort and coding in matlab although it finds out maximum amplitude but i want other parameters also to find out and return all of them.help me in improving my code.thanks.

function y=amplitude(array)
y=array(1,1);
for j=1:14
    if array(1,j)<array(1,j+1)
        y=array(1,j+1);
    end
end

 

hello i found out a code of matlab on internet. although it is much optimized but i am unable to understand it can anybody explain it to me...how it calculates amplitude and frequency????? fs is sampled frequency and x is the input of samples.

function [frq,amp,phi,ave] = sinfapm(x,fs)
%   Amplitude, frequency, phase  value of sampled sine wave

if nargin<2, error('Number of input arguments should be >= 2'), end
N   = length(x);                %   Length of time series of x
n   = 2:N-1;
x   = x(:);                     %   Make x a column vector
ave = mean(x);
xs  = x(n-1)+x(n+1);
C   = xs'*x(n)/(x(n)'*x(n))/2;
frq = acos(C)*fs*.5/pi;         %   frequency
if nargout>1                    %   amplitude:
    amp = sqrt((x(n)'*x(n)-2*x(n)'*x(n+1)*C + x(n+1)'*x(n+1))/(1-C^2)/(N-2));
    if nargout>2
        phi = asin(x(1)/amp);   %   Phase approximation
    end
end
end