StreamableKNIME Base Nodes version 4.0.1.v201908131444 by KNIME AG, Zurich, Switzerland
Renames all columns based on a regular expression search & replace pattern. The search pattern is a regular expression, possibly containing groups for further back referencing in the replace field.
In the simplest case, you can search and replace string literals. E.g. if the input columns are called "Foo 1", "Foo 2", "Foo 3", etc and the search string is "Foo", the replacement is "Bar", the output would be "Bar 1", "Bar 2", "Bar 3".
More complicated cases contain
capturing groups, i.e. expressions in parentheses that, if
matched in a column name, are saved. The groups can be referenced
in the replacement string using
is a number 0-9. These placeholders will be replaced by the
original occurrence in the input column name.
For instance, to rename the columns that are produced by the
Data Generator node (they follow a scheme
<number2> (Uni <number1>), you would use as
search string: "Universe_(\d+)_(\d+)" and as replacement:
"$2 (Uni $1)".
The special sequence
$i represents the current column
index (unless escaped by '\' (backslash)). E.g. in order to
precede each column name with the column index, use as search
string "(^.+$)", capturing the entire column name in a group,
and as replacement "$i: $1".
To use this node in KNIME, install KNIME Core from the following update site:
You want to see the source code for this node? Click the following button and we’ll use our super-powers to find it for you.
Do you have feedback, questions, comments about NodePit, want to support this platform, or want your own nodes or workflows listed here as well? Do you think, the search results could be improved or something is missing? Then please get in touch! Alternatively, you can send us an email to firstname.lastname@example.org, follow @NodePit on Twitter, or chat on Gitter!
Please note that this is only about NodePit. We do not provide general support for KNIME — please use the KNIME forums instead.