# How to update or recalculate AF, AC and AN from info field after applying some filters (DP\<10)?

**URL:** <https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721>\
**Category:** Hail Query & hailctl\
**Created:** [October 24, 2018, 4:17pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721 "2018-10-24T16:17:07Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Monica\_Sudarsanam](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@Monica\_Sudarsanam](https://discuss.hail.is/u/Monica_Sudarsanam)\
**Post date:** [October 24, 2018, 4:17pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721/1 "2018-10-24T16:17:07Z")

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Hello all,

I am trying to update AF,AC and AN from info field after applying some filters. I am wondering if there is a way to do it in Hail 0.2 version (other than variant qc method).  
Thanks in advance.

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**Author:** ![tpoterba](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/tpoterba/32/61_2.png) [@tpoterba](https://discuss.hail.is/u/tpoterba)\
**Post date:** [October 24, 2018, 4:17pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721/2 "2018-10-24T16:17:49Z")

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why not use variant qc?

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**Author:** ![Monica\_Sudarsanam](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@Monica\_Sudarsanam](https://discuss.hail.is/u/Monica_Sudarsanam)\
**Post date:** [October 24, 2018, 4:19pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721/3 "2018-10-24T16:19:07Z")

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I would like to have my data in vcf file format after the update and it seems variant qc data cannot be exported to vcf format.

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**Author:** ![tpoterba](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/tpoterba/32/61_2.png) [@tpoterba](https://discuss.hail.is/u/tpoterba)\
**Post date:** [October 24, 2018, 4:21pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721/4 "2018-10-24T16:21:18Z")

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ah, so it’s a matter of copying data to INFO -

```auto
mt = mt.annotate_rows(info = mt.info.annotate(AC = mt.variant_qc.AC, AN = mt.variant_qc.AN, AF = mt.variant_qc.AF))

```

Note that you’ll lose some information – these will be exported as “Number=.” instead of “Number=A”

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**Author:** ![Monica\_Sudarsanam](https://avatars.discourse-cdn.com/v4/letter/m/3be4f8/32.png) [@Monica\_Sudarsanam](https://discuss.hail.is/u/Monica_Sudarsanam)\
**Post date:** [October 24, 2018, 4:22pm UTC](https://discuss.hail.is/t/how-to-update-or-recalculate-af-ac-and-an-from-info-field-after-applying-some-filters-dp-10/721/5 "2018-10-24T16:22:08Z")

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Thanks a lot