1. building maxima on autocad's autolisp (Richard J. Fateman)
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OK, it is probably not a sound strategy to use AutoLISP for
the purpose I mentioned. This is because it is an interpreter
which would require access to the lisp source-code. My
problem would be completely solved if I could roll a kdelta
function definition for k_delta which performs exactly like that
in Macsyma 2.2. Then I could supply this function to my existing
ebooks and epapers in the appendix and recommend
readers to download Maxima instead. Here is how k_delta
function performs in Macsyma 2.2+:
k_delta(1,1); 1
k_delta(1,0); 0
k_delta(0,1); 0
k_delta(true,true); 1
k_delta(true,false); 0
k_delta(false,true); 0
So far I have failed to emulate this exactly in a kdelta function
using compare(i,j) with filters. Here is my kdelta function which
works partially:
kdelta(i,j):=block([args:args [i,j]],(compare(i,j)-pos)*(compare(i,j)-neg))
/((zero-neg)*(zero-pos))$
kdelta(1,1); 1
kdelta(1,0); 0
kdelta(0,1); 0
kdelta(true,true); 1
kdelta(true,false); (PNZ - NEG) (PNZ - POS)/((ZERO - NEG) (ZERO - POS) )
kdelta(false,true); (PNZ - NEG) (PNZ - POS)/((ZERO - NEG) (ZERO - POS) )
HuenYK
www.cahresearch.com