28 Jul
2011
28 Jul
'11
1:03 p.m.
Hello, I've just discovered amelia today and I am trying to use to to fill
some missing values in the attached dataset. I am using amelia in R, when I
call amelia(y) I am getting my output with still some missing values.
Does somebody know what might be I doing wrong, or what might be going on.
Thank you
Felipe Parra
2 Aug
2 Aug
11:19 a.m.
New subject: Missing Data in amelia output
Hi Luis,
You want to make sure that you save the output to a name:
a.out <- amelia(y)
Once you do this, you can see your imputed datasets here:
a.out$imputations[[1]]
That is, for example, the first imputed dataset. You can access others by
changing the "1" to another number. Hope that helps.
Cheers,
matt.
On Thu, Jul 28, 2011 at 1:03 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, I've just discovered amelia today and I am
trying to use to to fill
some missing values in the attached dataset. I am using amelia in R, when I
call amelia(y) I am getting my output with still some missing values.
Does somebody know what might be I doing wrong, or what might be going on.
Thank you
Felipe Parra
11:48 a.m.
New subject: Missing Data in amelia output
Hello, Thank you Matt. I am doing exactly this
a.out$imputations[[1]]
but I'am still getting NA's on this imputations. Do you know which migh be
the reason?
Thank you
Felipe Parra
On Tue, Aug 2, 2011 at 10:19 AM, Matt Blackwell <blackwel(a)fas.harvard.edu>wrote;wrote:
Hi Luis,
You want to make sure that you save the output to a name:
a.out <- amelia(y)
Once you do this, you can see your imputed datasets here:
a.out$imputations[[1]]
That is, for example, the first imputed dataset. You can access others by
changing the "1" to another number. Hope that helps.
Cheers,
matt.
On Thu, Jul 28, 2011 at 1:03 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, I've just discovered amelia today and
I am trying to use to to fill
some missing values in the attached dataset. I am using amelia in R, when I
call amelia(y) I am getting my output with still some missing values.
Does somebody know what might be I doing wrong, or what might be going on.
Thank you
Felipe Parra
12:23 p.m.
New subject: Missing Data in amelia output
Hi Felipe,
Without more information about the data and the exact code you are using to
impute it, it is hard to know what is happening. It could be the case that
the NAs in your data are not coded correctly and therefore not recognized as
missing by R. You can check this by using:
sum(is.na(a.out$imputations[[1]]))
This code will tell you how many missing observations there are in the
(supposedly) imputed dataset. This number might be greater than zero if you
tagged certain variables as "idvars"---these variables are not imputed.
Cheers,
matt.
On Tue, Aug 2, 2011 at 11:48 AM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, Thank you Matt. I am doing exactly this
a.out$imputations[[1]]
but I'am still getting NA's on this imputations. Do you know which migh be
the reason?
Thank you
Felipe Parra
On Tue, Aug 2, 2011 at 10:19 AM, Matt Blackwell <blackwel(a)fas.harvard.edu>wrote;wrote:
Hi Luis,
You want to make sure that you save the output to a name:
a.out <- amelia(y)
Once you do this, you can see your imputed datasets here:
a.out$imputations[[1]]
That is, for example, the first imputed dataset. You can access others by
changing the "1" to another number. Hope that helps.
Cheers,
matt.
On Thu, Jul 28, 2011 at 1:03 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, I've just discovered amelia today and
I am trying to use to to
fill some missing values in the attached dataset. I am using amelia in R,
when I call amelia(y) I am getting my output with still some missing values.
Does somebody know what might be I doing wrong, or what might be going
on. Thank you
Felipe Parra
12:32 p.m.
New subject: Missing Data in amelia output
Hello Matt, thanks for your answer, the code I am using is the following
path = "C:\\Users\\Hp\\Desktop"
load(paste(path,"\\y.rdata",sep=""))
out = amelia(y)#[4000:5000,])
summary(y)#[4000:5000,])
for(i in 1:length(out$imputations)){ print(summary(out$imputations[[i]])) }
and the data I send it attached. Thanks again for any help you can give me
with this
Felipe Parra
On Tue, Aug 2, 2011 at 11:23 AM, Matt Blackwell <blackwel(a)fas.harvard.edu>wrote;wrote:
Hi Felipe,
Without more information about the data and the exact code you are using to
impute it, it is hard to know what is happening. It could be the case that
the NAs in your data are not coded correctly and therefore not recognized as
missing by R. You can check this by using:
sum(is.na(a.out$imputations[[1]]))
This code will tell you how many missing observations there are in the
(supposedly) imputed dataset. This number might be greater than zero if you
tagged certain variables as "idvars"---these variables are not imputed.
Cheers,
matt.
On Tue, Aug 2, 2011 at 11:48 AM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, Thank you Matt. I am doing exactly this
a.out$imputations[[1]]
but I'am still getting NA's on this imputations. Do you know which migh be
the reason?
Thank you
Felipe Parra
On Tue, Aug 2, 2011 at 10:19 AM, Matt Blackwell <blackwel(a)fas.harvard.edu
wrote:
Hi Luis,
You want to make sure that you save the output to a name:
a.out <- amelia(y)
Once you do this, you can see your imputed datasets here:
a.out$imputations[[1]]
That is, for example, the first imputed dataset. You can access others by
changing the "1" to another number. Hope that helps.
Cheers,
matt.
On Thu, Jul 28, 2011 at 1:03 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, I've just discovered amelia today and
I am trying to use to to
fill some missing values in the attached dataset. I am using amelia in R,
when I call amelia(y) I am getting my output with still some missing values.
Does somebody know what might be I doing wrong, or what might be going
on. Thank you
Felipe Parra
12:37 p.m.
New subject: Missing Data in amelia output
Hi Felipe,
The problem with the data you are using is that there are rows that are
completely missing. That is, there is no observed information for those
rows. Amelia cannot impute rows with no observed data, so it returns those
rows with all NAs. There is a warning message about this when you run
Amelia, but you may have missed it at the beginning of the imputation
procedure.
Cheers,
matt.
On Tue, Aug 2, 2011 at 12:32 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello Matt, thanks for your answer, the code I am
using is the following
path = "C:\\Users\\Hp\\Desktop"
load(paste(path,"\\y.rdata",sep=""))
out = amelia(y)#[4000:5000,])
summary(y)#[4000:5000,])
for(i in 1:length(out$imputations)){ print(summary(out$imputations[[i]])) }
and the data I send it attached. Thanks again for any help you can give me
with this
Felipe Parra
On Tue, Aug 2, 2011 at 11:23 AM, Matt Blackwell <blackwel(a)fas.harvard.edu>wrote;wrote:
Hi Felipe,
Without more information about the data and the exact code you are using
to impute it, it is hard to know what is happening. It could be the case
that the NAs in your data are not coded correctly and therefore not
recognized as missing by R. You can check this by using:
sum(is.na(a.out$imputations[[1]]))
This code will tell you how many missing observations there are in the
(supposedly) imputed dataset. This number might be greater than zero if you
tagged certain variables as "idvars"---these variables are not imputed.
Cheers,
matt.
On Tue, Aug 2, 2011 at 11:48 AM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
Hello, Thank you Matt. I am doing exactly this
a.out$imputations[[1]]
but I'am still getting NA's on this imputations. Do you know which migh
be the reason?
Thank you
Felipe Parra
On Tue, Aug 2, 2011 at 10:19 AM, Matt Blackwell <
blackwel(a)fas.harvard.edu> wrote:
Hi Luis,
You want to make sure that you save the output to a name:
a.out <- amelia(y)
Once you do this, you can see your imputed datasets here:
a.out$imputations[[1]]
That is, for example, the first imputed dataset. You can access others
by changing the "1" to another number. Hope that helps.
Cheers,
matt.
On Thu, Jul 28, 2011 at 1:03 PM, Luis Felipe Parra <
felipe.parra(a)quantil.com.co> wrote:
> Hello, I've just discovered amelia today and I am trying to use to to
> fill some missing values in the attached dataset. I am using amelia in R,
> when I call amelia(y) I am getting my output with still some missing values.
>
> Does somebody know what might be I doing wrong, or what might be going
> on. Thank you
>
> Felipe Parra
>
>
>
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