Žroutík wrote:
>
>> SmoothData <- list(exists=TRUE, span=0.001)
>> SmoothData
>>
> $exists
> [1] TRUE
>
> $span
> [1] 0.001
>
>
>> exists("SmoothData")
>>
> TRUE
>
>
>> exists("SmoothData$span")
>>
> FALSE
>
>
'SmoothData$span' = 'foo'
exists("SmoothData$span")
# TRUE
>> exists("SmoothData[[2]]")
>>
'SmoothData[[2]]' = 'bar'
exists("SmoothData[[2]]")
# TRUE
the problem in your case is that you have an object named 'SmoothData'
with a nested component named 'span', but you're testing for the
existence of an object named 'SmoothData$span'.
as shown in a recent post, one attempt to do your task would be
exists('SmoothData') && 'span' %in% names(SmoothData)
# TRUE
vQ
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