31 Aug
2007
31 Aug
'07
12:57 a.m.
Dear Ian,
One small error that I am currently aware of that is on the list to be
fixed
is that Amelia sometimes can not handle datasets that only have one
variable. On the face of it, an imputation model doesn't make much sense
in such a case (in a univariate setting, either the observation must be
completely observed, or completely unobserved) so it has not been
something that we've been concerned to fix. However, there are odd cases
where you need to do exactly that (for example, the dataset might appear
to be univariate after you strip away all the id and time variables, but
before you add in fixed effects).
This is the first thing your error message suggests, that it is trying to
perform an operation on x, the data to be imputed, that it can't
accomplish if x is univariate. If you think this is the case, let me
know, and I'll fix this for you.
If this is clearly not the case, set the option p2s=2 in the list of
arguments to Amelia (this increases the
amount of information printed to the screen over the Amelia run) and copy
me the screen output offlist. This will give me a better idea of where
the error is occuring and we'll take it from there.
regards,
James Honaker
On Thu, 30 Aug 2007, Moran Ian (5C3) CHPCT wrote:
Dear List members,
When attempting to run Amelia on a .csv file I receive the following error:
There was an unexpected error in the execution of Amelia.
Double check all inputs for errors and take note of the error message:
Error in colSums(sapply(priors[, 1, drop = FALSE], ">", blanks)) :
'x' must be an array of at least two dimensions
I have no idea what this means and as an AMELIA novice I would appreciate
any help anyone can give!
Many thanks,
Ian
Ian Moran
Assistant Psychologist
Child and Adolescent Psychology
2nd Floor, 'A' Block
St Leonard's
Nuttall St
London
N1 5LZ
Direct: 020 7683 4311
Switch: 020 7683 4000
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