Re: [R] question about binary data file and data.frame

From: jim holtman <jholtman_at_gmail.com>
Date: Wed 08 Feb 2006 - 11:45:11 EST

Read it into a vector and then convert into a matrix; convert to a data frame:

df <- readBin("d:/sim.data", what='double', n=10000, size=4) # make n greater than file size
dim(df) <- c(2, length(df) / 2)
df <- t(df)
colnames(df) <- c('age', 'weight')
df <- as.data.frame(df)

On 2/7/06, www.brook@gmail <www.brook@gmail.com> wrote:
>
> Each data (edge,weight) is numerical data with type double (4 bytes)
>
> df<-file("d:/sim.data","rb")
> age[1]<-readBin(df,double())
> weigt[1]<-readBin(df,double())
> ...
> age[10]<-readBin(df,double())
> weigt[10]<-readBin(df,double())
>
> it is not asc file.
>
>
>
> ======= 2006-02-07 13:03:17 =======
>
> >www.brook@gmail wrote:
> >> I have a binary file with data sequence in the order
> >
> > What do you mean by 'binary file'?
> >
> >> [age,weight][age,weight] ....
> >
> > How are age and weight encoded in this 'binary file'?
> >
> >> I know the length of the data and I want to load it into a
> >> data.frame. of course a way to do this is to read age and weight
> >> seperately and then use cbin(age,weight) to combine them into a
> >> dataframe, but is there a better solution?
> >>
> >
> > Is it really an ASCII file? With age and weight separated by commas,
> >and then age-weight pairs separated by spaces? Are there really square
> >bracket pairs in there too?
> >
> > Or is it really a binary file, a series of 4 or 8-byte binary
> >representations of age and weight?
> >
> > Barry
>
> = = = = = = = = = = = = = = = = = = = =
>
>
>
>
>
> www.brook
> www.brook@gmail.com
> 2006-02-07
>
>
>
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>
>

--
Jim Holtman
Cincinnati, OH
+1 513 247 0281

What the problem you are trying to solve?

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Received on Wed Feb 08 11:58:47 2006

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