i want to find and hear the frequency responce of a .wav file using following equation y(n)=y(n-1​​)-0.9*y(n​-​2)+x(n)+​x(​n-1) but still its giving error in equation foolowing is my code

the main error is due to the equation please help me to figure it out .following is the code and error

PathOriginal = fullfile('C:\Users\Desktop\assigmnt', 'Voice 002.wav'); [y, Fs, n] = wavread(PathOriginal);

b=[1 1]; a=[1 -1 0.9];

y(n)= y(n-1)-0.9*y(n-2)+x(n)+x(n-1) [H,w]=freqz(b,a,n,Fs) player=audioplayer(y, Fs) play(player)

player2=audioplayer(H, w, Fs) play(player2)

   error : ??? Error: File: q2.m Line: 7 Column: 12
  Unexpected MATLAB operator.

this error appears in equation's line .

Answer 1

[Walter Roberson]

You need to use semi-colons to separate multiple commands in the same line. For example

player2=audioplayer(H, w, Fs) play(player2)

is not valid and needs to be

player2=audioplayer(H, w, Fs); play(player2)

[lione felus]

thanks walter but its actually giving error in the line where equation is written . here is my m file

[Walter Roberson]

The line in question is

y(n)=  y(n-1?)-0.9*y(n-?2)+x(?n-1)+x(n)

You should delete the line and retype it.