I get the following error message after using the sysfit package's function
'systemfitClassic':
Error in data[[eqnVar]] : subscript out of bounds
When I do this:
MSYS1 <- cbind(Y, Num, F, PO, PD, GO, GD)
MigOLS1 <- systemfitClassic("OLS", F ~ PO + PD + GO + GD, eqnVar = "Num",
timeVar = "Y", data = MSYS1)
and I get this error message:
Error in inherits(x, "factor") : attempt to select more than one element
when I do this (removing quotes from columns set as 'eqnVar' and 'timeVar'):
MSYS1 <- cbind(Y, Num, F, PO, PD, GO, GD)
MigOLS1 <- systemfitClassic("OLS", F ~ PO + PD + GO + GD, eqnVar = Num, timeVar
= Y, data = MSYS1)
When I query 'typeof()' I get the following:
Y: Integer
Num: Integer
F: Integer
PO: Integer
PD: Integer
GO: Double
GD: Double
I have set my data up in a manner analogous to that in the examples in the
systemfit documentation. Also, the panel is balanced. If it matters, here are
some descriptions of the data:
Y: Year
Num: ID of Flow
F: Flow
PO: Origin Population
PD: Destination Population
GO: Origin GDP
GD: Destination GDP
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