# `•vfi` — Numeric input

`•vfi text` returns two vectors, `[valid numbers]`, for the
whitespace-separated fields of `text`. An invalid field has the flag
`0ₓ` and the value `0`. Fields are parsed as numbers, never executed.

Fields take BPL’s written forms of numbers, with plain letters or
subscripts. `•vfi` reads back the numbers that `⍕` displays:

``` bpl
•vfi ⍕1r3 1j2 1e20   ⍝ [[1 1 1]ₓ [1ᵣ3 1ⱼ2 1ₑ20]]
```

`separators •vfi text` splits on each character in `separators` instead.
It trims whitespace around fields. An empty field is a valid `0`.
[Numeric input](../data.ipynb#numeric-input) covers it.

Errors: `DOMAIN` when either argument is not text.