"ts", typically the result of
ts.# S3 method for ts
diff(x, lag = 1, differences = 1, …)# S3 method for ts
na.omit(object, …)
"ts" containing the values to be
differenced.na.omit method, a time series without missing values.
The class of object will be preserved.na.omit method omits initial and final segments with
missing values in one or more of the series. ‘Internal’
missing values will lead to failure.diff;
na.omit, na.fail,
na.contiguous.