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
