Filter DataFrame Rows

[hwperkins]

Given a DataFrame:

a   b c
---------
foo x   y
  y x bar
baz x   y

When I execute:

$df = $df->filter(function ($row, $index) {
    return $row['a'] == 'foo' or $row['c'] == 'bar';
});

Then the DataFrame becomes:

a   b c
---------
foo x y
  y x bar

[mrahmadt]

#22