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();
// output
["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;
// output
["id","value","name"]
t[t.columnNames().tail()];
// output
["IBM","MSFT","GOOG"] // retrieve the last column of a table as a vector