how to Plot wav file in Matlab

[munaza]

Hi
i am new to Matlab. I want to plot frequency and magnitude of .wav file after filtering it upto 7khz .please tel me what code of Matlab will do this task. thanks

 

[er.deepshikha]

let ur .wav file is road
[road,fs]=wavread('road.wav');
sound(road,fs);
right=road,2); %right is 2nd column of road
time=(1/fs); %1/fs * length(right)
t=linspace(0,time,length(right)); %generates a row vector t of 'no. of elements in column 2 i.e right' points linearly spaced between and including 0 and time
plot(t,right)
xlabel('time (sec)');
ylabel('relative signal strength');

 

[er.deepshikha]

let ur .wav file is road
[road,fs]=wavread('road.wav'); [ mention fs= 7000hz]

sound(road,fs);
right=road,2); %right is 2nd column of road
time=(1/fs); %1/fs * length(right)
t=linspace(0,time,length(right)); %generates a row vector t of 'no. of elements in column 2 i.e right' points linearly spaced between and including 0 and time
plot(t,right)
xlabel('time (sec)');
ylabel('relative signal strength');