--invert_hash does not work with --oaa

[martinpopel]

With older VW (7.4.0), the following code

    echo '1 | a b c
    3 | a d e' | vw --oaa 3 --invert_hash model.inv
    cat  model.inv

prints a nice inverted-hash model with lines like ^a:108232:0.046370. With the newest VW, it does not work (no features are printed).

[arielf]

Hi John,

I ran a git bisect and found that this regression happened here:

=== ERROR: --oaa produced no weights readable model
d883b1ada66a4c627c4f4cd38fec8f12252b76b6 is the first bad commit
commit d883b1ada66a4c627c4f4cd38fec8f12252b76b6
Author: John Langford <jl@hunch.net>
Date:   Wed Jun 18 21:41:54 2014 -0400

    minor tweaks

Please take a look when you get a chance.

I'll try to extend RunTests to cover readable models as well soon.

[JohnLangford]

This was an initialization order problem, now fixed.

-John

On 07/09/2014 03:53 PM, Ariel Faigon wrote:

Hi John,

I ran a git bisect and found that this regression happened here:

|=== ERROR: --oaa produced no weights readable model
d883b1a is the first bad commit
commit d883b1a
Author: John Langford jl@hunch.net
Date: Wed Jun 18 21:41:54 2014 -0400

 minor tweaks

|
|

Please take a look when you get a chance.

I'll try to extend RunTests to cover readable models as well soon.

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#337 (comment).

[KristianHolsheimer]

It seems that this issue is still present when using --ftrl. Could this also be caused by a similar ordering issue?

[JohnLangford]

It should work for --ftrl now.