Thanks Ted for the help. I will try and see if my case will get the expected results.
Dong On 7/30/07, Ted Harding <[EMAIL PROTECTED]> wrote: > > On 29-Jul-07 17:41:58, Dong GUO ¹ù¶« wrote: > > Hi, > > > > I want to save an array(say, array[6,7,8]) write a cvs file. > > How can I do that??? can I write in one file? > > > > if I could not write in one file, i want to use a loop to save > > in different files (in the array[6,7,8], should be 8 csv files), > > such as the filename structure should be: > > file ="filename" +str(i)+"." +"csv" > > > > Many thanks. > > The following (illustrated on a smaller array) may help: > > A<-array((1:60),dim=c(3,4,5)) > D<-dim(A) > > write.table(t(dim(A)),file="A.csv",sep=",", > quote=FALSE,row.names=FALSE,col.names=FALSE) > > Z<-as.vector(A) > write.table(t(Z),file="A.csv",append=TRUE,sep=",", > quote=FALSE,row.names=FALSE,col.names=FALSE) > > Then the file A.csv contains two rows: > > 3,4,5 > 1,2,3,4,5,6,7,8,9,10,11,12, ... ,55,56,57,58,59,60 > > of which the first gives the dimension, the second the > data for the array. > > You can then reconstruct another array, say B, as: > > dimB<-scan(file="A.csv",sep=",",nlines=1) > dataB<-scan(file="A.csv",sep=",",skip=1,nlines=1) > B<-array(dataB,dimB) > > That's a hard way to do things, perhaps, but since you said > you wanted the array as a CSV file, this is one way to do that. > > Since a CSV text file is essentially a two-dimensional object > (fields in rows, by rows), to store a higher-dimensional object > in such a format you have to include the "meta-data" about the > structure -- in this case the list of dimensions. > > Note, however, that, although it is a CSV file, > > read.csv("A.csv",header=FALSE) > > will not work nicely, since it will give you two rows of equal > length, the first one padded out with (in this case 57) NAs, > which you will then have to clean up; which you can do, but by > the time you've done it you might as well have done it the above > way! > > Hoping this helps, > Ted. > > -------------------------------------------------------------------- > E-Mail: (Ted Harding) <[EMAIL PROTECTED]> > Fax-to-email: +44 (0)870 094 0861 > Date: 30-Jul-07 Time: 22:24:12 > ------------------------------ XFMail ------------------------------ > [[alternative HTML version deleted]]
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