columnNames
Syntax
columnNames(X)
Arguments
X is a matrix/table.
Details
Return the column names of X as a vector. Please check related function: rowNames.
Examples
$ x=1..6$2:3;
$ x;
#0 |
#1 |
#2 |
|---|---|---|
1 |
3 |
5 |
2 |
4 |
6 |
$ x.rename!(`a`b`c);
a |
b |
c |
|---|---|---|
1 |
3 |
5 |
2 |
4 |
6 |
$ x.columnNames();
["a","b","c"]
$ t = table(1 2 3 as id, 4 5 6 as value, `IBM`MSFT`GOOG as name);
$ t;
id |
value |
name |
|---|---|---|
1 |
4 |
IBM |
2 |
5 |
MSFT |
3 |
6 |
GOOG |
$ columnNames t;
["id","value","name"]
$ t[t.columnNames().tail()];
["IBM","MSFT","GOOG"]
// retrieve the last column of a table as a vector