R: Read in Blaise data models

read_dm_blaise {LaF} | R Documentation

## Read in Blaise data models

### Description

Read in Blaise data models

### Usage

    read_dm_blaise(filename, datafilename = NA)

### Arguments

`filename` | the filename of the file containing the data model.
`datafilename` | the filename of the data file to which the data model belongs.

### Details

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.

### Value

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 Also

See `write_dm` to write the data model to file. The data models can be used to open a file using `laf_open`.

### Examples

    # Create some temporary files
    tmpdat <- tempfile(fileext="dat")
    tmpbla <- tempfile(fileext="bla")

    # 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=tmpdat)

    # 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=tmpbla)
    model <- read_dm_blaise(tmpbla, datafilename=tmpdat)
    laf <- laf_open(model)

    # Cleanup
    file.remove(tmpbla)
    file.remove(tmpdat)

[Package LaF version 0.8.4 Index]