# Calculate genotype concordance within a trio matrix

**URL:** <https://discuss.hail.is/t/calculate-genotype-concordance-within-a-trio-matrix/2832>\
**Category:** Hail Query & hailctl\
**Created:** [September 12, 2022, 4:52pm UTC](https://discuss.hail.is/t/calculate-genotype-concordance-within-a-trio-matrix/2832 "2022-09-12T16:52:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![CuriousGeneticist](https://avatars.discourse-cdn.com/v4/letter/c/6f9a4e/32.png) [@CuriousGeneticist](https://discuss.hail.is/u/CuriousGeneticist)\
**Post date:** [September 12, 2022, 4:52pm UTC](https://discuss.hail.is/t/calculate-genotype-concordance-within-a-trio-matrix/2832/1 "2022-09-12T16:52:11Z")

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Hi all. If I have a `trio_matrix` object, can I check if there’s a way to check the concordance of the genotype calls of the proband and the mother and annotate it for the probands? Currently I’m exporting the data to do it, but I wonder if there’s a more organic way to do it.

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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:** [September 14, 2022, 1:13pm UTC](https://discuss.hail.is/t/calculate-genotype-concordance-within-a-trio-matrix/2832/2 "2022-09-14T13:13:56Z")

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> concordance of the genotype calls of the proband and the mother and annotate it for the probands

Does this mean compute de novo state? Do you have an example of what you want to compute/check?