# 2-D Delta function question

1. Oct 28, 2007

### 10krunner

I'm trying to plot the function f(x,y) = DiracDelta[r-r0]and then take the Fourier transform.

Is this a radial delta function? I'm having trouble understanding the significance of this "function" .

Thanks!

Last edited: Oct 28, 2007
2. Oct 28, 2007

### meopemuk

Try using the fact that delta function is non-zero only if its argument is zero.

I am not sure what definition of theta you are using, but in standard radial coordinates
tan(theta) = y/x.

Eugene.