[R] read.xlsx - write.xlsx: reading/writing numbers as character

Jim Holtman jholtman at gmail.com
Thu Jan 14 18:17:48 CET 2016

Write it out as a csv from excel and see what the data looks like.  That may help  in seeing what the problem is.

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<div>-------- Original message --------</div><div>From: Mohsen Jafarikia <jafarikia at gmail.com> </div><div>Date:01/14/2016  11:36  (GMT-05:00) </div><div>To: jim holtman <jholtman at gmail.com> </div><div>Cc: r-help <r-help at stat.math.ethz.ch> </div><div>Subject: Re: [R] read.xlsx - write.xlsx: reading/writing numbers as character </div><div>
</div>Thanks for the comment Jim. There is no blank cell. All have numbers. 


On Thu, Jan 14, 2016 at 11:29 AM, jim holtman <jholtman at gmail.com> wrote:
Take a look at the data coming in since you may have something that looks like characters (maybe 'blanks').  What you think is numeric in EXCEL might not be.​

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 Thu, Jan 14, 2016 at 11:20 AM, Mohsen Jafarikia <jafarikia at gmail.com> wrote:

I am reading some excel files (each with one sheet) and trying to write
them all in one file. I am not sure if read.xlsx reads some of the columns
as character or write.xlsx writes them as character where they are not
characters. I have 12 columns (2 character and 10 numbers). From 10 number
columns, with float and integer numbers, only 3 of them are recognized
correctly. I was wondering how can I define the the column format for
read.xlsx - write.xlsx.

Here comes a simple example of my code:

ifn1 <- "A.xlsx"
dat1  <- read.xlsx(ifn1, sheetName="A.csv", header = TRUE)

ifn2 <- "F.xlsx"
dat2  <- read.xlsx(ifn2, sheetName="F.csv",header = TRUE)

write.xlsx(dat1,  file="AF.xlsx", sheetName="A",   showNA=FALSE,
row.names=FALSE, append=FALSE)
write.xlsx(dat2,  file="AF.xlsx", sheetName="F",   showNA=FALSE,
row.names=FALSE, append= TRUE)

Thanks in advance!

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