Description Usage Arguments Details Value Dependencies Author(s) Examples
Computes the sample length of a study variable.
1 |
x |
a character, the name of a study variable. |
datasources |
a list of opal object(s) obtained after login in to opal servers;
these objects hold also the data assign to R, as |
If a vector is shortened, extra values are discarded and when a vector is lengthened, it is padded out to its new length with NAs (nul for raw vectors).
It is a wrapper for the server side function getLength
.
return a numeric value.
getLength
Paula Raissa Costa e Silva
1 2 3 | {
size <- ds.length('D$birth_weight')
}
|
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