I've found a strange set of errors doing trig on fractions. These do not occur on my 32 or 64 bit PCs. They also don't occur if x is integers.
x=.0.1*i:58 y=.1 o. x x=.0.1*i:59. NB. this is the first vector length where I saw the error y=.1 o. x |NaN error | y=.1 o.x x=.0.1*i:143 NB. this is where it seems to disappear y=.1 o. x I wrote a loop to find problems one scalar at a time. There doesn't seem to be any upper limit to the failures this way. Bug =: 3 : 0 r =. i. 0 i =. - y while. i <: y do. a =. 0.1 * i try. b =. 1 o. a catch. r =. r , a end. i =. i + 1 end. r ) Bug 60 _6 _5.9 _5.6 _5.3 _4.9 _4.8 _4.5 _4.2 _4 _3.9 _3.7 _3.6 _3.5 _3.3 _3.2 _3.1 _3 _2.8 _2.7 _2.5 _2.2 _1.8 _1.6 _1.5 _1.4 _0.9 _0.8 0.8 0.9 1.4 1.5 1.6 1.8 2.2 2.5 2.7 2.8 3 3.1 3.2 3.3 3.5 3.6 3.7 3.9 4 4.2 4.5 4.8 4.9 5.3 5.6 5.9 6 Paul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
