Ticket #1484 (closed assessed: fixed)

Opened 21 months ago

Last modified 21 months ago

Catch time series scaled in Sum of Squares calculation

Reported by: carlw Owned by: villyc
Priority: high Milestone: Ecopath 6: Release 6.5
Component: Ecosim Version: 6.5 beta
Severity: major Keywords:
Cc:

Description

Up to now Catch time series (of absolute data) were incorrectly scaled in Ecosim. This means, in effect, that model fitting was performed to the trend in the time series rather than the absolute values.

This is very wrong! Catches are absolute and must be treated as such

Change History

comment:1 Changed 21 months ago by jeroens

Absolute catch time series (reference) are now no longer scaled. This means that model fits will be very different if this type of time series is used, and Fit to Time Series / anomaly searches will produce different results.

We have added a new reference time series type Relative Catch (type 61) to make old models behave as they did, but this requires users to explicitly convert their reference time series of Absolute Catch (type 6) to Relative Catch (type 61).

When you do this, anomaly searches will produce similar results to earlier versions of EwE

comment:2 Changed 21 months ago by jeroens

  • Owner set to villyc
  • Status changed from new to assigned

comment:3 Changed 21 months ago by jeroens

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