OPR

[KosmicKhaos]

Does anyone have a an excel document or something where I can plug in match scores and figure out OPR or how I could put an OPR calculator in an Android App

[stingray27]

I will be posting a spreadsheet after Week 1 regarding advanced stats including OPR and a few other metrics.
I have done these spreadsheets the last few years and they can be found here:
http://www.chiefdelphi.com/media/papers/3003
http://www.chiefdelphi.com/media/papers/2967

In addition, I have an app on the google play store called OPRFIRST2014 that was developed to focus specifically on OPR calculations for android. I released the entire source code for it because TheBlueAlliance began to include OPR calculations in their app and it was too hard to gain users with everyone using thebluealliance.com. So feel free to look through here and use the code to calculate OPR. (Although I may warn you, the code may be a little hard to read because I was just beginning android development and this was the first app I created).
https://github.com/mray19027/OPRFIRST2014

The EXACT location of where my OPR calculations take place is here:
https://github.com/mray19027/OPRFIRS...Info.java#L305

[saikiranra]

Ed Law and his team has put together awesome resources for calculating OPR that can be found here.

Calculating OPR isn't actually that hard, although it requires some knowledge about basic linear algebra. Essentially, you are trying to solve a linear system of equations for a certain constant that is what you expect a team to contribute to an alliance each match (OPR). If you have teams a, b, and c playing together in one match, and they score a x amount of points, you are solving

a(OPR) + b(OPR) + c(OPR) = x

As more matches occur, the matrix equations become more complex. In the form of Ax = b, A is the matrix whose values correspond to the amount of matches teams played with each other, x is the OPR vector, and b is the vector of the total score each team made in all the matches they played.

If you don't want to do the hard math/plug in your own match scores, you can use The Blue Alliance's API to get OPRs off their site.

[Ether]

Originally Posted by saikiranra

b is the vector of the total score each team made in all the matches they played

Not quite.

Each element of |b| corresponds to a team, and the value of that element is the sum of the alliance scores for all alliances that team played with.

[GeeTwo]

Originally Posted by saikiranra

If you don't want to do the hard math/plug in your own match scores, you can use The Blue Alliance's API to get OPRs off their site.

I don't see the OPR anywhere in their API; am I missing something, or did you just mean that the data required to plug into an OPR calculation is there?

[plnyyanks]

Originally Posted by GeeTwo

I don't see the OPR anywhere in their API; am I missing something, or did you just mean that the data required to plug into an OPR calculation is there?

The API will return the result of the calculations for OPR, DPR, and CCWM. See here in the docs.

Hit

/api/v2/event/<event-key>/stats

It'll return an output like:

Spoiler for Lots of data:

➜  phil@fedora ~  curl --header "X-TBA-App-Id:foo:bar:baz" http://www.thebluealliance.com/api/v2/event/2014cthar/stats
{"oprs": {"558": 61.03862458660732, "571": 25.26315867245658, "1124": 41.56940261999079, "4572": 22.657822140768516, "238": 22.044939318938813, "3146": 12.63390393300261, "178": 46.950456367359891, "177": 92.226404149116206, "4557": 43.334926949271072, "175": 81.334997593159528, "230": 53.027513648529002, "236": 58.096099167356243, "2785": 11.601348126111738, "3555": 7.2284300176004974, "3104": 14.702459074944898, "173": 9.5159523225474345, "839": 19.960465485473357, "2170": 22.066703794171406, "181": 49.492453525796911, "3182": 26.955221924000668, "3634": 34.152969306235953, "4097": 28.571656205234454, "716": 57.420439555814042, "5142": 15.649331351710339, "999": 36.426610246955612, "3525": 50.453711167618096, "5129": 27.586754386014597, "228": 52.10253623902166, "4628": 17.892949898607437, "95": 29.973898403369855, "176": 65.769697919858061, "1991": 53.614388815829997, "4055": 51.617441033456331, "3464": 37.843662949585344, "3566": 31.888458744244957, "4958": 33.821768467384359, "1687": 12.329197344290588, "1740": 7.5272579695618127, "2067": 39.32265324466966}, "ccwms": {"558": 47.714841929054501, "571": -2.2244726240688477, "1124": 32.556983571913001, "4572": -6.0853698077920315, "238": -35.070117174800544, "3146": -36.885966963297193, "178": 14.96298531132085, "177": 71.191849807978272, "4557": -7.7570855600831052, "175": 30.835262590761605, "230": 3.6399453862621081, "236": 20.44387440579483, "2785": -37.350014006119174, "3555": -34.672659512804991, "3104": -28.249324008158332, "173": -37.577530295276226, "839": -19.803791613841952, "2170": -27.524965779988744, "181": 3.7024741266095287, "3182": -8.8673292856880401, "3634": 9.0289537858067348, "4097": -28.403823457387144, "716": 25.671255492674394, "5142": -18.532183768327222, "999": 16.38015834182071, "3525": 27.23416882060123, "5129": -15.548754966962644, "228": 8.7310226121904542, "4628": 7.01561775548765, "95": 5.8413142346092108, "176": 32.851548640364612, "1991": 37.027081101957357, "4055": 13.387511797720734, "3464": 1.4555715944903778, "3566": -15.204361189187283, "4958": -13.407078085909482, "1687": -23.514376735710577, "1740": -21.265070753703672, "2067": 8.2718542816890643}, "dprs": {"558": 13.32378265755275, "571": 27.487631296525407, "1124": 9.0124190480777919, "4572": 28.743191948560586, "238": 57.115056493739317, "3146": 49.519870896299814, "178": 31.987471056039084, "177": 21.034554341137934, "4557": 51.092012509354177, "175": 50.499735002397919, "230": 49.387568262266932, "236": 37.652224761561435, "2785": 48.951362132230891, "3555": 41.901089530405542, "3104": 42.951783083103251, "173": 47.093482617823668, "839": 39.764257099315302, "2170": 49.591669574160193, "181": 45.789979399187374, "3182": 35.822551209688733, "3634": 25.12401552042925, "4097": 56.975479662621588, "716": 31.749184063139648, "5142": 34.181515120037545, "999": 20.046451905134909, "3525": 23.219542347016823, "5129": 43.135509352977216, "228": 43.371513626831245, "4628": 10.877332143119782, "95": 24.13258416876063, "176": 32.918149279493427, "1991": 16.587307713872672, "4055": 38.229929235735582, "3464": 36.388091355095021, "3566": 47.092819933432281, "4958": 47.228846553293849, "1687": 35.843574080001126, "1740": 28.792328723265495, "2067": 31.05079896298054}}

[Citrus Dad]

Originally Posted by plnyyanks

The API will return the result of the calculations for OPR, DPR, and CCWM.

I'm really interested in that DPR this year...

[plnyyanks]

Originally Posted by Citrus Dad

I'm really interested in that DPR this year...

By my calculations, DPR this year is 83% fear factor and 17% taking-cans-in-auto*

*Results not scientific

[Caleb Sykes]

Originally Posted by plnyyanks

By my calculations, DPR this year is 83% fear factor and 17% taking-cans-in-auto

I'm not sure that I believe this. At least 62% of statistics are made up on the spot.

[Ether]

Originally Posted by Caleb Sykes

At least 62% of statistics are made up on the spot.

... and the remaining 48% are wrong.

[Kevin Sevcik]

Originally Posted by Ether

... and the remaining 48% are wrong.

I commend your 110% effort on this joke, Ether.

[PayneTrain]

Originally Posted by plnyyanks

By my calculations, DPR this year is 83% fear factor and 17% taking-cans-in-auto*

*Results not scientific

This whole time I thought it was 43% litter and 57% gravity

[EricH]

Originally Posted by PayneTrain

This whole time I thought it was 43% litter and 57% gravity

You sure it's not 50% not having a loose cannon robot, 33% gravity, 10% luck, and 47% having your HP land a noodle inside your opponent's robot?

(And yes, that's more than 100%. Last I checked, 90% of statistics are made up on the spot with no math checks involved.)

[Caleb Sykes]

Originally Posted by EricH

(And yes, that's more than 100%. Last I checked, 90% of statistics are made up on the spot with no math checks involved.)

At least 50% of the posts on this thread are a joke.

Okay, I'm 100% done making statistics jokes now.

[jlmcmchl]

Originally Posted by Citrus Dad

I'm really interested in that DPR this year...

Oh, if only The Blue Alliance's API gave me container scores for each match, then I could estimate the number of containers they get from the step.

Nevermind, I can totally do that.