Dear sextante experts,

we are using the Density tool with the "kernel".  No technical problems,
but three practical questions:

- we are looking for the data output of the function.  Where is it ?  How
can we get it ?
- the result of the kernel function is definitely good looking.  But we
can't explain it.  What does the gradient represent ?  Is it a real gaussian
standard distribution, or what ?
- how would we proceed to obtain a similar output, but with a linear
gradient or a gravitational (1/d^2) gradient ?

Many thanks,

Joachim
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