What does the symbol "sign" stand for ?
ex, G=sign(D), where G and D are vectors or Matrices...
2007-01-04 06:30:33 · 3 answers · asked by Ramy E 2 in Science & Mathematics ➔ Mathematics
Normally the sign function returns a 1 if its argument is positive, 0 if it's 0, and -1 if it's negative.
I would assume that, for a vector or matrix, the sign function would return a vector or matrix of the same size, but with each element replaced as explained above.
It looks like Bob's answer below means that my assumption was too simple, though.
2007-01-04 06:40:06 · answer #1 · answered by Jim Burnell 6 · 1⤊ 0⤋
Look for the 'SIN' function on your calculator. It is a trig expression.
2007-01-04 14:39:43 · answer #2 · answered by Anonymous · 0⤊ 1⤋
try starting your research from here
http://books.google.com/books?vid=ISBN0198537956&id=p9cIkDSNu7UC&pg=RA1-PA438&lpg=RA1-PA438&ots=kh8j7mZWum&dq=matrix+sign+function+definition&sig=P6LrBC5xkFK-pO6uE-I1cRwTCc4
http://books.google.com/books?vid=ISBN3540628282&id=_V9LkOXGfDwC&pg=PA342&lpg=PA342&ots=a2QlVHP9UW&dq=matrix+sign+function+definition&sig=NdC7UbqUcEXwjZUsEgajBFXkZCE
2007-01-04 15:18:53 · answer #3 · answered by Deep Thought 5 · 0⤊ 0⤋