On 06.03.2010 21:49, rkevinbur...@charter.net wrote:
In browsing the source I see the following construct:
res<- switch(type, working = , response = r, deviance = ,
pearson = if (is.null(object$weights))
r
else r * sqrt(object$weights), partial = r)
I understand that 'switch' will execute the code that is matched by its corresponding
string value (in this case 'type'). What I don't understand is the empty code. Is this
code saying that if the type is "deviance" then fill the 'res' variable with an
empty value? From my naive point of view it seems that 'res' will only get a value(s) if
'type' is 'response', 'pearson', or 'partial'. Please help with my understanding.
Please do read the help pages!
From ?switch:
"If there is an exact match then that element is evaluated and returned
if there is one, otherwise the next element is chosen, [...]"
Example:
switch("A", A=1, B=, C=2) # 1
switch("B", A=1, B=, C=2) # 2
Uwe Ligges
Kevin Burton
rkevinbur...@charter.net
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and provide commented, minimal, self-contained, reproducible code.
