MaplePrimes - answers and comments on Question, No explicit statement

unapply

Joe Riel — Fri, 02 Nov 2012 19:59:34 Z

Use ?unapply. For example

A[1] := 23:
unapply(piecewise(x<0, A[1], y < 1, 2, 3),x,y) ;
        (x, y) -> piecewise(x < 0, 23, y < 1, 2, 3)

nerdpole — Fri, 02 Nov 2012 20:26:51 Z

update:

it sounds: alpha := unapply( piecewise(

Thanks a lot!

That didn't work :(

the exact function is:

alpha := (x1,x2,x3)-> piecewise(
x1 < 0 or x2 < 0 or x3 < 0 or h < x1 or h < x2 or h < x3, 0,
0.5*h ..... );

but neither

alpha := (x1,x2,x3)-> unapply(piecewise(
x1 < 0 or x2 < 0 or x3 < 0 or h < x1 or h < x2 or h < x3, 0,
0.5*h ..... )),x1,x2,x3);

nor

alpha := (x1,x2,x3)-> piecewise(
x1 < 0 or x2 < 0 or x3 < 0 or h < x1 or h < x2 or h < x3, 0,
0.5*h

did the job :(

what is wrong?

Thanks

acer — Sat, 03 Nov 2012 01:06:31 Z

@nerdpole Try it as,

alpha := unapply(piecewise(
    x1 < 0 or x2 < 0 or x3 < 0 or h < x1 or h < x2 or h < x3, 0,
    0.5*h  ..... )),x1,x2,x3);

with inserting the (x1,x2,x3) -> yourself.