read_dm_blaise {LaF} | R Documentation |
Read in Blaise data models
read_dm_blaise(filename, datafilename = NA)
filename |
the filename of the file containing the data model. |
datafilename |
the filename of the data file to which the data model belongs. |
The function reads the data model from file and returns a list that can be
used by laf_open
to open the file for reading. Only a subset of
the most common features found in Blaise files are supported. If part of the
data model can not be parsed a warning is given.
Returns a data model (which is a list containing all the relevant information
to open a file using laf_open
. When the file contains more than
one data model a list of data models is returned and a warning issued.
See write_dm
to write the data model to file. The data models
can be used to open a file using laf_open
.
# Generate test data lines <- c( " 1M 1.45Rotterdam ", " 2F12.00Amsterdam ", " 3 .22 Berlin ", " M22 Paris ", " 4F12345London ", " 5M Copenhagen", " 6M-12.1 ", " 7F -1Oslo ") writeLines(lines, con="tmp.dat") # Create a file containing the data model writeLines(c( "DATAMODEL test", "FIELDS", " id : INTEGER[2]", " gender : STRING[1]", " x : REAL[5] {comment}", " city : STRING[10]", "ENDMODEL"), con="tmp.bla") model <- read_dm_blaise("tmp.bla", datafilename="tmp.dat") laf <- laf_open(model)