closeData
closes
the external file when the user is finished writing to it.
writeNextDataRows(dh, data)
openData
.
The function
closeData
is used to close
the external file after writing all data.
When writing out character data, the values in a column are truncated to the maximum string length for that column that is written out in the first block.
# Open an external data file of type SAS dh <- openData("randnorm.ssd01", type="SAS", openType="write") # Write out blocks of random normals, 10 rows at a time for(i in 1:10) { x <- matrix(rnorm(50), ncol=5) writeNextDataRows(dh, x) } closeData(dh) # Now read the all 100 rows back in z <- importData("randnorm.ssd01", colNames=paste("Z",1:5,sep=''))