Alternativley, you can first type
9!:49[1
then it will accept the old syntax in the current session.
On Fri, Jan 3, 2014 at 2:34 PM, Daniel Valentino
<daniel.valent...@gmail.com> wrote:
> Hi:
>
> I am very new to J, and not very experienced with functional programming,
> but I am trying to use J for a data analytics project that involves a lot
> of statistical analysis. In learning to program in J, I started to run
> some of the examples from Ken Iverson's Calculus book, and I'm having
> trouble with the following:
> PS =: 1 : (':'; '(u. x.) p. y.') NB. explicit definition of power series
>
> On my system, it reports an error: "spelling error" with the caret under
> the u. I found the u. operator in the dictionary, and it appears to be a
> unicode operator, but it doesn't appear to be defined in my J interpreter.
>
> I tried the following:
> s1 =: $&(0 1)
> x =: (i.6)%2
>
> 5 s1 PS x
>
> x1 and x appear to be defined correctly, but I get the "spelling error"
> message when I use the PS operator:
>
> spelling error
> | (u. x.) p. y.
> | ^
> | PS=: 1 :(':';'(u. x.) p. y.')
>
> I am using J version j64-701gtk on Windows 7, SP1, 64 bit (intel i7).
>
> Is this an appropriate question for this forum, or should I post this
> message elsewhere? If it is appropriate, can someone help me to understand
> the definition of the PS operator, and does anyone recognize why I'm
> getting the reported error?
>
> Thanks in advance for any help!
>
> Sincerely,
> Daniel
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