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2021-07-23Fix issue caught in `nearest` while testing `slink`Muriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * While running tests for slink, to try and understand what it is doing in order to write the appropriate tests for it, an issue arose that pointed a blindspot in the former understanding of now `nearest` should work. This commit fixes the issue found in both the expected data, and the code.
2021-07-23New function (`slink`): return [] on exceptionMuriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: Add minimum code to pass new test * tests/unit/computations/test_slink.py: new test Add test to ensure that the new `slink` function return an empty list in case and exception is raised. Add the new `slink` function with minimum amount of code needed to pass the test.
2021-07-22Get shortest distance from two lists/tuples of member coordinatesMuriithi Frederick Muriuki
* gn3/computations/slink.py: add code to ensure new test passes * tests/unit/computations/test_slink.py: new test This one is a little weird: from https://github.com/genenetwork/genenetwork1/blob/master/web/webqtl/heatmap/slink.py#L57-L63 It gets rid of the last coordinates in both the lists of the member coordinates, and uses the remaining coordinates to find the shortest members. For example, given the following member coordinates: - i=[0,1,2] and j=[5,7,9], it uses [0,1] and [5,7] - i=[3,6,1] and j=[7,13], it uses [3,6] and [7] to find the shortest distances. I (fredmanglis) am not sure why it does it this way, since I'd have expected it to use all the coordinates, however, since at this time we need to retain bug-compatibility with the older code, I have done it as it is done in the old code. I also add a statement to raise an exception in the case where i and j are not lists of integers, or integers
2021-07-22Test for shortest distance between members in a list and coordinateMuriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: add code to pass new test * tests/unit/computations/test_slink.py: new test Given a list of members in a group, and a coordinate for a member in the same group, find the distance of the closest member from the given coordinate in the group.
2021-07-22Check that given list and both coordinates, we get shortest distanceMuriithi Frederick Muriuki
* gn3/computations/slink.py: Add code to compute the distance given the coordinate of both members on the parent list/tuple * tests/unit/computations/test_slink.py: * Change the name of the tests to more closely correspond to the business requirement the test is checking for * Update the comments to indicate some more things that might need to be done in the future
2021-07-22Check that all distances are positive or zeroMuriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: check that all distances between the 'somethings' are all either zero or positive. * tests/unit/computations/test_slink.py: * Remove data with all distances positive or zero, since it would fail the test * Change the expected message to more closely correspond to the business logic
2021-07-22Check that distance from A to B is same as from B to AMuriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: check that the distance from child A to B is the same as distance from child B to A. If not, throw an exception. * tests/unit/computations/test_slink.py: * Change the name of the test to more closely correspond to the business logic being tested. * Update the data in a separate test such that it does not error out due to failing to fulfill the expectations of separate requirement. - pass tests - Rename test - Fix errors: distances same both directions
2021-07-22Check that child distance from itself is zeroMuriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: Check that a child's distance from itself is zero. If not, throw an exception. The children lists are a list of distances of "something" from other "somethings". There is still some need to establish what those "somethings" are, so that the test names can reflect the ideas that are actually being tested for. * tests/unit/computations/test_slink.py: Change the name of the test so that it more closely corresponds to the business logic it is actually testing, and not the mechanics of testing the idea.
2021-07-21Extract tests from code in GN1Muriithi Frederick Muriuki
Issue: https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi * gn3/computations/slink.py: Add dummy `nearest' function * tests/unit/computations/test_slink.py: Add some tests This commit adds tests to try and reproduce the working of the `nearest' function in: https://github.com/genenetwork/genenetwork1/blob/master/web/webqtl/heatmap/slink.py This commit might not yet have extracted all the expected behaviour of the `nearest' function, and therefore, there is a possibility of a later commit augmenting the work in this commit.