Dear Helpers,
I wrote a simple function to standardise variables if they contain more than
one value. If the elements of the variable are all identical, then I want the
function to return zero.
When I submit variables whose elements are all identical to the function, it
returns not zero, but
On 23-Feb-2012 Jonathan Williams wrote:
Dear Helpers,
I wrote a simple function to standardise variables if they
contain more than one value. If the elements of the variable
are all identical, then I want the function to return zero.
When I submit variables whose elements are all identical
On Thu, Feb 23, 2012 at 04:40:07PM -, Ted Harding wrote:
[...]
A basic solution for this special case would be
zt=function(x){
if (sd(x) == 0) return(0*x) else return( (x-mean(x))/sd(x) )
}
This should cover the case where length(table(x))==1 (see also below).
I'm not happy
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