[R] Help with error on function: Error in .... attempt to apply non-function

Duncan Murdoch murdoch at stats.uwo.ca
Tue Sep 15 13:42:21 CEST 2009

On 15/09/2009 6:32 AM, Corrado wrote:
> Dear Duncan,
> this is a reproducible example: it is the function copied straight from my 
> Eclipse.

  - You posted it in a way that couldn't be cut and pasted into R:  you 
added line numbers.  (A similar problem is when people use print() to 
show a dataset; it's not easy to get one of those into a new session. 
Show us the source code to generate the example instead.)

  - You didn't give the calling sequence so I could just cut and paste 
the code into R and see the error.  So even if I took the time to turn 
off the line numbers, I would have to spend time figuring out what 
inputs you used.

  > I found the mistake (thanks to Peter) ....

But you didn't describe it so no one else can learn from it.

Duncan Murdoch

> On Tuesday 15 September 2009 11:15:29 Duncan Murdoch wrote:
>> Corrado wrote:
>>> Dear R gurrus,
>>> I wrote this function
>>> http://scsys.co.uk:8002/33852?ln=on&store=on&submit=Format+it!
>>> for a small package I am preparing.
>>> Whenever I run the function I get the error
>>> Error in Mspline(i = i, x = x, degree = kk, t = t) :  attempt to apply
>>> non- function
>>> Anyone could point me out what I am doing wrong?
>> It would be a lot easier to do so if you gave us a reproducible example.
>> But the usual cause for that is using () instead of [], or forgetting an
>> operator.  I think you've done the second:  you have (k-1)(t[i+k]-t[i])
>> where you should have (k-1)*(t[i+k]-t[i]).
>> Duncan Murdoch

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