convolution function in c++

[crazychicken]

has anyone written a function that will do 1-d time domain convolution of 2 finite length discrete vectors? i feel like this should be a very standard function, but i cant find it anywhere. i've tried writing my own, but not being a very good c++ programmer, i dont know how to deal with the fact that when the filter is not "full", (k-a) is a non existent index (negative)



int[] convolve(signal[], channel[])
{
int n,k;
int y[n];

for(k=0;k<n;k++)
{
for(a=0;a<n;a++)
{
y[k]+=signal[k-a]*channel[a];
}
}

return y;
}



that is what i have , but can someone help me with the syntax, or provide me with simply a better function?


thanks,

david

 

[Matthias99]

Should probably be in Software/Programming, not HT.

 

[crazychicken]

you're right - sorry.

admin: pls delete this thread - i re-created it in the right spot.