From NUM to INT

Inline.

-- Bert


On Tue, Apr 26, 2016 at 2:25 PM, Andr? Luis Neves <andrluis at ualberta.ca>
wrote:

Ok. I`m trying to run a Poisson glmm with an observation-level random
intercept. But I`m getting the following error for the 'Baci' variable:

'Error: (maxstephalfit) PIRLS step-halvings failed to reduce deviance in
pwrssUpdate'. I  guess this message is because the baci variable is not a
an integer,

Why would you "guess" that? Given your magnitudes, I suspect it's a
scaling issue. Try centering and scaling your Baci variable before
fitting.

Cheers,
Bert





and cannot be transformed into an integer as R has a threshold

of
2x10^9 even in 64 bit R.

It runs fine for the fungii variable.

If you guys want to run the data (attached), the full command is below.

Thanks.

---------------------------------------------

##Import data:

qPCR <- read.delim(file.choose(),
                 header = TRUE,
                 dec = ".")

##Load package

library(lme4)

##Other steps:

qPCR$obs <- 1:nrow(qPCR)
qPCR$fID<-as.factor(qPCR$ID)
qPCR$fDiet<-as.factor(qPCR$Diet)

##Run the model:

M1 <- glmer (Baci ~ fDiet + Crossover + (1|fID:Crossover) + (1|obs),
             family = poisson, data=qPCR)



Andre



On Tue, Apr 26, 2016 at 2:36 PM, jim holtman <jholtman at gmail.com> wrote:

Can you explain why you need them as 'integer',  A floating point
representation can hold a value upto ~4.5e15 as an "integer" keeping the
precision that you might need.


Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.

On Tue, Apr 26, 2016 at 1:11 PM, Andr? Luis Neves <andrluis at ualberta.ca

wrote:

Dear all:

I converted the columns (Baci, Meti, Fungii, Protozoai) into integers
(using excel) and then imported the data (.txt) into R. Interestingly,

the

other three variables were loaded as INT, but the 'Baci' one continued

as

Num.

I imported the data using the following command line:

X <- read.delim(file.choose(),
                 header = TRUE,
                 dec = ".")

Here is the structure of X:

str(X)

'data.frame': 115 obs. of  5 variables:
 $ ID       : Factor w/ 61 levels "107ZRED","112BLKW",..: 8 12 15 18

26 27

29 31 32 36 ...
 $ Baci     : num  2.90e+12 5.55e+11 9.46e+11 8.13e+11 4.06e+11 ...
 $ Meti     : int  352645997 334146268 767208656 171567266 462747405
414905627 237010514 387480048 214671355 328813226 ...
 $ Fungii   : int  43645 19009 15998 2189 8972 8240 3133 17922 6156

13746

...
 $ Protozoai: int  3220523 1851891 3252462 1665675 34123768 23175015
203685
4261780 43110492 69802572 ...


I need Baci as an integer, and tried to convert it using as.integer
function, but was not successful.


Could anyone please help me to solve this problem.

Thanks,



--
Andre

--
Andre