how to write a program in matlab for to identify the energy level in given speech signal

I wrote this program. is this correct...?

x=wavread('E:\project\kani imp\akk');

l=size(x)

s=1;

for t=[4000:4000:l]

sum=0;

for t1=[s:t]

sum=sum+abs(x.^2);

en=sum;

e=en+1;

end

end

y=length(e)

plot(y,e);

[Thomas]

The for line makes no sense.. What are you trying to do

what is

 for t=[4000:4000:1]   ??

Answer 1

[Wayne King]

I think you need to define for us what you mean by energy level

If you just mean the norm of the vector, the speech sample, then

   norm(x)

gives you the 2-norm.

If you mean DC level, that is just:

mean(x)

or

xdft = fft(x);
1/length(x)*xdft(1)