Incorrect calculation of PSTD_ROC_AUC statistic

[TatianaBurek]

Describe the Problem

Aggregation statistic doesn't calculate correct values for PSTD_ROC_AUC statistic.
plot_20230512_203500.agg_stat.info.txt
plot_20230512_203500.data.agg_stat.txt

Expected Behavior

values should be like this:
RRFSE_CONUS_ICperts_nostoch.rrfs_conuscompact_3km_prob 160000 PSTD_ROC_AUC 0.954596669974263
RRFSE_CONUS_ICperts_nostoch.rrfs_conuscompact_3km_prob 170000 PSTD_ROC_AUC 0.951804745793181
RRFSE_CONUS_ICperts_nostoch.rrfs_conuscompact_3km_prob 180000 PSTD_ROC_AUC 0.952286333211654
RRFSE_CONUS_ICperts_nostoch.rrfs_conuscompact_3km_prob 190000 PSTD_ROC_AUC 0.950166505972019
RRFSE_CONUS_ICperts_stoch.rrfs_conuscompact_3km_prob 160000 PSTD_ROC_AUC 0.959631793570794
RRFSE_CONUS_ICperts_stoch.rrfs_conuscompact_3km_prob 170000 PSTD_ROC_AUC 0.959012367604244
RRFSE_CONUS_ICperts_stoch.rrfs_conuscompact_3km_prob 180000 PSTD_ROC_AUC 0.95513305325736
RRFSE_CONUS_ICperts_stoch.rrfs_conuscompact_3km_prob 190000 PSTD_ROC_AUC 0.950740286744192

Environment

Describe your runtime environment:
1. Machine: (e.g. HPC name, Linux Workstation, Mac Laptop)
2. OS: (e.g. RedHat Linux, MacOS)
3. Software version number(s)

To Reproduce

Describe the steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
Post relevant sample data following these instructions:
https://dtcenter.org/community-code/model-evaluation-tools-met/met-help-desk#ftp

Relevant Deadlines

List relevant project deadlines here or state NONE.

Funding Source

2771021

Define the Metadata

Assignee

• Select engineer(s) or no engineer required
• Select scientist(s) or no scientist required

Labels

• Select component(s)
• Select priority
• Select requestor(s)

Projects and Milestone

• Select Organization level Project for support of the current coordinated release
• Select Repository level Project for development toward the next official release or add alert: NEED CYCLE ASSIGNMENT label
• Select Milestone as the next bugfix version

Define Related Issue(s)

Consider the impact to the other METplus components.

• METplus, MET, METdataio, METviewer, METexpress, METcalcpy, METplotpy

Bugfix Checklist

See the METplus Workflow for details.

• Complete the issue definition above, including the Time Estimate and Funding Source.
• Fork this repository or create a branch of main_<Version>.
  Branch name: bugfix_<Issue Number>_main_<Version>_<Description>
• Fix the bug and test your changes.
• Add/update log messages for easier debugging.
• Add/update unit tests.
• Add/update documentation.
• Push local changes to GitHub.
• Submit a pull request to merge into main_<Version>.
  Pull request: bugfix <Issue Number> main_<Version> <Description>
• Define the pull request metadata, as permissions allow.
  Select: Reviewer(s) and Development issues
  Select: Organization level software support Project for the current coordinated release
  Select: Milestone as the next bugfix version
• Iterate until the reviewer(s) accept and merge your changes.
• Delete your fork or branch.
• Complete the steps above to fix the bug on the develop branch.
  Branch name: bugfix_<Issue Number>_develop_<Description>
  Pull request: bugfix <Issue Number> develop <Description>
  Select: Reviewer(s) and Development issues
  Select: Repository level development cycle Project for the next official release
  Select: Milestone as the next official version
• Close this issue.

[TatianaBurek]

The problem was in incorrect indexes in the final DataFrame. After concatenation the indexes were not reset and the roc_auc calculation was performed using wrong indexes.
After adding 'reset_index' roc_auc was calculated correctly. I also added 'reset_index' to other statistic calculations