Open ngjaying opened 8 months ago
Hello @ngjaying sir , I am Prabal Pratap Singh Rathore , second - year student of Btech in Artificial Intelligence and Data Science. I am good at python and several libraries with experience in ML and DL with keras, tensorflow and Pytorch. I want to look into this issue , I am currently exploring eKuiper , So please assign this Good First Issue to me .
we have to see how this function stdev and var are implemented internally because aggregate functions exclude null values for calculation but for these function involves stastical calculation that can be mislead by null values. So, please can you navigate to the directory or code file to see how they are present in code.
@BNNARAJ Sorry for the late response. The functions are in https://github.com/lf-edge/ekuiper/blob/master/internal/binder/function/funcs_agg.go. Actually, you can do a search in the codebase to find it next time.
Thank you sir
Hello @ngjaying sir, In the definition of the stddev and var function, we can see the cast function which is reconstructing the float64slice and removing null values "float64Slice, err := cast.ToFloat64Slice(arg0, cast.CONVERT_SAMEKIND, cast.IGNORE_NIL)", so it looks like it does take null values but while calculating it is reconstructing the input array while removing null values by using cast.IGNORE_NIL . As I am a beginner please ensure that I am following the correct understanding and approach.
Hi @BNNARAJ, Maybe it was fixed. Could you try to add a ut case to confirm that? If that's the case, we can push the test case as a PR to close this issue. Thanks!
Hello @ngjaying Sir , I saw there is a test case for that and I added one more nil input and comment that test case for better recognition and made a PR.
@EscanorUt Looks like there is no problem for null values. Do you still encounter that issue? If so, could you please provide a test case?
Hello @ngjaying This issue was fixed in https://github.com/lf-edge/ekuiper/pull/2748 so you can close it. Thank you
Discussed in https://github.com/lf-edge/ekuiper/discussions/2589