Pagalba su Matlab

Kas turi patirties su matlab ir susiduria su panašia užduotim ar tik matlabu ir gali padeti ispresti, Atsilyginsiu uz darba

Uzduots siektiek paprastesne, kas turi patirties su matlabu rasykit

Nekuriant temos gal kas mato cia klaida ?

>> Untitled
Error: File: Untitled.m Line: 1 Column: 1
Unexpected MATLAB operator.

>> y=wavread('C:\windows\media\ding.wav');



size(y)



ans =



      17504           2



x=y(1:17504,1);



plot(x)



count=0;



size(x)



ans =



      17504           1



for i=1:17504 if (x(i)>0 & x(i+1<0) count=count+1;end;end; 



??? for i=1:17504 if (x(i)>0 & x(i+1<0) count=count+1;end;end; 



                                       |



Error: Unexpected MATLAB expression.



for i=1:17504 if (x(i)>0 & x(i+1)<0) count=count+1;end;end;



count



count =



       1850



norm=count/17504



norm =



   0.1057



for i=1:17503 if (x(i)<0 & x(i+1)>0) count=count+1;end;end;



count



count =



       3713



norm=count/17504



norm =



   0.2121



parts=17504/256;



fori=1:parts sum=0; for j=1/256 sum=sum+abs(x((i-1)*256+j));end; en(i)=sum/256;end;



??? fori=1:parts sum=0; for j=1/256 sum=sum+abs(x((i-1)*256+j));end; en(i)=sum/256;end;



                |



Error: Unexpected MATLAB expression.



for i=1:parts sum=0; for j=1/256 sum=sum+abs(x((i-1)*256+j));end; en(i)=sum/256;end;



??? Subscript indices must either be real positive integers or logicals.



for i=1:parts sum=0; for j=1:256 sum=sum+abs(x((i-1)*256+j));end; en(i)=sum/256;end;



silence=0;



for i=1:parts if(en(i)<0.2) silence=silence+1;end; end;



silence



silence =



   68



plot(x)



plot(en)



>>