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I want to do the computations from a loop by means of a C routine that will be called from R. The lm() function is entailed in that loop. As a guidance, I have taken the following example from http...
Dear all: I want to modify the 'StructTS' function from the 'stats' package. First, I am writing a working copy of the original version and got some problems. I have two versions of the function plus the original one. The...
Hi everybody: I need to get the names of the arguments in an object of class "expression". I've got the following expression: > x <- expression(rho * cos(omega)) Is there any function or procedure that returns the names of the...
Hi everyone: My question is about the function "StructTS" of the core package "stats", which fits by maximum likelihood the basic structural time series model. According to theory and the references given in "?StructTS", the covariance matrix of the initial...
When missing observations (NAs) are present in the data and the regular or differencing filters are applied in stats::arima, the number of used observations (nobs) reported by nobs() is bigger than the actual number of non-NA observations. This...
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