[R] Variable c and function c

Duncan Murdoch paypal at murdoch-sutherland.com
Tue Aug 21 17:46:07 CEST 2007

On 8/21/2007 11:07 AM, Vladimir Eremeev wrote:
> I have found the error in my script which was semi-automatically translated
> from the other person's MATLAB code.
> The error is that c was assigned a value inside a function.
> That is the function body contained the following instructions
>   c<-nw*czr
>   d<-nw*cz
>   rFren<-0.5*(abs((cz-c)/(cz+c))^2+abs((d-czr)/(d+czr))^2)
>   firstguess<-c( 0,0,0,3,0.5,  0 ,     0 ,  0.000001)
> I have already run this function and obtained the results, it was rather
> long process, therefore I don't want to rerun it.
> I was not given any warnings. 
> How did the interpreter treat this? 
> Will the result change, if I change the variable from "c" to, say, "c." ?
> This variable is not used anywhere else in the function.

When looking for a function, R will ignore variables that are not 
functions.  So what you show above is not an error, though it can be 
confusing, so it's not a good idea.

Duncan Murdoch

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