[R] cat, and printing the last separator

[Duncan Murdoch]

On 12-01-25 7:04 AM, Federico Calboli wrote:
> On 25 Jan 2012, at 11:54, Duncan Murdoch wrote:
>> I think the documentation for cat is a little ambiguous, but it is working as documented if I read "If any element of sep contains a newline character," to mean that the element consists of a newline and nothing else.  I'm not sure if that was the intended reading or not.
>
> I don't know about the reading, but if memory serves me well, once upon a time cat would not automatically go to a newline, i.e.
>
> cat(1, file = '')
>
> 1>
>
> so I'd have to explictly set the newline as a separator:
>
> cat(1, file= '', sep = '\n')
>
> 1

I don't think that has changed.

Duncan Murdoch

>
>>
>
> Though I admit my memory could be wrong. Thank you for the solution btw.
>
> BW
>
> Federico
>
>
>
>
>>
>>>
>>> How would I overcome this issue? I tried a number of things, all of which have failed.
>>>
>>
>> I'd use sprintf for that, i.e. something like
>>
>> count<- c(3, 17, 15)
>> pct<- c(20, 30, 31)
>> cat(sprintf("%d (%d%%)\n", count, pct), sep="")
>>
>> where count and pct are the vectors of values to go into the display.
>>
>> Duncan Murdoch
>
> --
> Federico C. F. Calboli
> Neuroepidemiology and Ageing Research
> Imperial College, St. Mary's Campus
> Norfolk Place, London W2 1PG
>
> Tel +44 (0)20 75941602   Fax +44 (0)20 75943193
>
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
>