What's an irrational number in this context? Your list a are reciprocals of integers and so are all rational. On the other hand, going just by the display, 0.5 is a rational number (1%2), but since the display is to 6 significant digits, for all you know 0.5 could be 0.500000314159265358979... (0.5+ pi*1e_7) and irrational.
On Wed, Jun 13, 2018 at 10:29 AM, Skip Cave <[email protected]> wrote: > Here's another problem similar to my previous one about finding integers in > a floating point array: > > Find the irrational numbers in a floating-point array: > > Given the vector a: > > ]a =. % 1+i.20 > > 1 0.5 0.333333 0.25 0.2 0.166667 0.142857 0.125 0.111111 0.1 0.0909091 > 0.0833333 0.0769231 0.0714286 0.0666667 0.0625 0.0588235 0.0555556 > 0.0526316 0.05 > > > Create a function that will generate a boolean array indicating the > locations of the irrational numbers in a. > > > Skip > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
