Opened 3 years ago

Closed 18 months ago

#270 closed task (wontfix)

Verify that BUMPS is computing reduced chisq correctly

Reported by: smk78 Owned by:
Priority: critical Milestone: SasView 4.0.0
Component: SasView Keywords: Park, uncertainties, chisq
Cc: Work Package: SasView QA and testing

Description

The Park optimiser is not computing reduced chisq correctly resulting
in it returning uncertainties that are larger (by a factor 5 - 10)
than they should be.

See attached files.

Attachments (4)

RE Error estimates from fits.pdf (56.8 KB) - added by smk78 3 years ago.
Initial error report
RE Error estimates from fits - updated.pdf (152.0 KB) - added by smk78 3 years ago.
Evaluation of the promblem by Paul K
error-estimates-from-fits-email-thread.pdf (151.9 KB) - added by smk78 3 years ago.
email thread
25330_add_var_merged.xml.txt (20.2 KB) - added by smk78 3 years ago.
users data (strip .txt from end before use)

Download all attachments as: .zip

Change History (15)

Changed 3 years ago by smk78

Initial error report

Changed 3 years ago by smk78

Evaluation of the promblem by Paul K

comment:1 Changed 3 years ago by smk78

Since the Park optimiser is to be replaced by Bumps, does this error need to be fixed?

comment:2 Changed 3 years ago by ajj

  • Work Package set to SasView Bug Fixing

comment:3 Changed 3 years ago by butler

  • Owner set to smk78
  • Status changed from new to assigned
  • Summary changed from Park optimiser is not computing reduced chisq correctly to Verify that BUMPS is computing reduced chisq correctly

comment:4 Changed 3 years ago by butler

OOps .. should have added the comment when changing title from "PARK does not compute ..." to the current title. Since we are removing PARK the ticket made no sense. However Paul suggests we double check that BUMPS is doing it correctly before closing this ticket. So have renamed.

comment:5 Changed 3 years ago by butler

check that LM and the Nelder Mead simplex give similar results using previous set from the PARK ticket. Steve to submit

comment:6 Changed 3 years ago by smk78

Added email thread with Users SasView? 3.0.0 fit uncertainties, and users data set.

Changed 3 years ago by smk78

email thread

Changed 3 years ago by smk78

users data (strip .txt from end before use)

comment:7 Changed 3 years ago by butler

  • Type changed from defect to task
  • Work Package changed from SasView Bug Fixing to SasView QA and testing

comment:8 Changed 2 years ago by butler

  • Owner smk78 deleted

comment:9 Changed 2 years ago by ajj

  • Milestone changed from SasView 3.1 to SasView Next Release +1

comment:10 Changed 2 years ago by butler

  • Milestone changed from SasView Next Release +1 to SasView 4.0.0

comment:11 Changed 18 months ago by ajj

  • Resolution set to wontfix
  • Status changed from assigned to closed

Too much has changed for this ticket to still be possible to deal with. If we see any issues in future, raise new ticket.

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