How about tent=: 0 >. [:-: -.^:(>&0.5)"0 tent _0.1 0 0.1 0.2 0.3 0.5 0.7 0.8 0.9 1 1.1 0 0 0.05 0.1 0.15 0.25 0.15 0.1 0.05 0 0
Marshall On Sun, Aug 28, 2011 at 7:47 AM, Ric Sherlock <[email protected]> wrote: > Here's one tacit approach to the tent function: > tent=: 0:`-:`(-:@-.)`0:@.(0 0.5 1&I.)"0 > tent _0.1 0 0.1 0.2 0.3 0.5 0.7 0.8 0.9 1 1.1 > 0 0 0.05 0.1 0.15 0.25 0.15 0.1 0.05 0 0 > > Given it is rank 0 I expect its performance can be improved. Also > although dyadic I. appears to work in this case, it doesn't strictly > follow the 0<=x condition below. > > On Sun, Aug 28, 2011 at 10:40 PM, mikel paternain <[email protected]> > wrote: > > > > How do you write in J a "tent" function: > > > > g(x)= x/2 if 0<=x<=1/2, > > (1-x)/2 if 1/2 < x < 1 > > > > and, more important, How do you write in J a Takagi function with the > "tent" function: > > > > h(x)= Sum [r=0 to infinite, g(2^r x)/2^r] > > > > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
