Fixed Width File Reader
This node can be used to read data from an ASCII file or URL location.
It reads files where a column is defined by the number of characters
and not by a column delimiter.
When you open the node's configuration dialog and provide a filename,
the reader creates one column. This column shows only the remaining characters
in the preview table and won't be appended to the output table.
The preview shows only the first couple of lines. It could happen then, that
the preview appears looking fine, but the execution of the Fixed Width File Reader
fails.
Dialog Options
- ASCII file location
- Enter a valid file name or URL. When
you press ENTER, a preview of the file is shown.
You can also choose a previously read file from the drop-down list,
or select a file from the "Browse..." dialog.
- Preserve user settings
- If checked, the checkmarks and
column names/types you entered are preserved even if
you select a new file. By default, the dialog starts with fresh
default settings for each new file location.
- Click on add
- A new dialog opens where column properties can be set:
- Number of columns to add: Specify a number of columns you would like to add.
- Name/Prefix: Set a unique column name or prefix if more than one column should be added.
- Width: The width of the column in number of characters.
- Type: Choose a type.
- Missing Value Pattern: Pattern for which a "missing cell" will be created.
- DON'T include: The Fixed Width File reader skips this column.
- Click on edit
- A new dialog opens with the column settings set. Each entry
can be changed and the current column will be replaced.
- Click on remove
- The selected columns will be removed.
Note: You can't remove the first column if "Read row IDs" is selected.
- Read row IDs
- If checked, the first column in the file
is used as row IDs. If not checked, a default row headers are
created.
- Read column headers
- If checked, the items in the first
line of the file are used as column names.
Otherwise default column names are created.
- Click on the table header
- If the column header in the
preview table is clicked the edit dialog will open.
Ports
Output Ports
0 |
Datatable just read from the file |
This node is contained in KNIME Base Nodes
provided by KNIME GmbH, Konstanz, Germany.