R help - Mar 2012 - constant function

Is it possible to define a constant function (for example the zero function) in
R?

I found the following unsatisfying hack to create the "seven
function":

constant <- stepfun( x = -100:100,   y = rep(7,   201)  )


This is mathematically unsatisfying because the domain is artificially
restricted to [-100,100] rather than (-Inf,Inf).

Additionally, unless I use pch="n" there are ugly dots on the plot
(and again this feels hackish).


Any suggestions on what else to do?



Thanks in advance.

Hi Chris,
how about this:

constant<-function(x) rep(7,length(x))
curve(constant,-1000,100)

cheers.

Am 07.03.2012 06:41, schrieb Chris Waggoner:
> Is it possible to define a constant function (for example the zero
function) in R?
> 
> I found the following unsatisfying hack to create the "seven
function":
> 
> constant <- stepfun( x = -100:100,   y = rep(7,   201)  )
> 
> 
> This is mathematically unsatisfying because the domain is artificially
restricted to [-100,100] rather than (-Inf,Inf).
> 
> Additionally, unless I use pch="n" there are ugly dots on the
plot (and again this feels hackish).
> 
> 
> Any suggestions on what else to do?
> 
> 
> 
> Thanks in advance.
> 
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

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