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 >
