This is the table I have included in the Emacs mode documentation. I got the information from the ISO spec, so I hope it's correct:
0 (1-R⋆2)⋆0.5 ¯1 arcsin R 1 sin R ¯2 arccos R 2 cosin R ¯3 arctan R 3 tan R ¯4 (R+1)×((R-1)÷R+1)⋆0.5 4 (1+R⋆2)⋆0.5 ¯5 arcsinh R 5 sinh R ¯6 arccosh R 6 cosh R ¯7 arctanh R 7 tanh R ¯8 -(¯1-R×2)⋆0.5 8 (¯1-R⋆2)⋆0.5 ¯9 R 9 Real part of R ¯10 +R 10 |R ¯11 0J1×R 11 Imaginary part of R ¯12 ⋆0J1×R 12 Arc R Regards, Elias On 1 August 2014 06:46, David B. Lamkins <dlamk...@gmail.com> wrote: > Reshape your datum as an empty vector then match to zilde. If the match > succeeds then your datum is a number; otherwise a character/string. > > I believe that there's a circle function to extract the imaginary part > of a number, if any. You can test for a nonzero imaginary part. > > Finally, you can compare a number's floor to the number itself to > determine whether the value is integer or real. > > Not knowing your application, I have to warn you that you shouldn't use > these tests to infer anything about APL's storage. All of the numeric > tests are subject to quad-CT. > > On Thu, 2014-07-31 at 15:54 -0400, Peter Teeson wrote: > > I feel pretty stupid. > > Looked in the APL2 IBM manual but do not understand how to determine the > data type of a variable. > > Neither the primitives nor the Quads sparked the answer in my brain. > > It must be something pretty obvious but not to me right now. > > > > So if I have a function FOO X how do I determine if X is character, > integer, float, or imaginary? > > Assuming that it is not a nested array of course. > > > > respect… > > > > Peter > > > > > >
