Ticket #644 (closed assessed: not an issue)

Opened 10 years ago

Last modified 10 years ago

Relative biomass Timeseries not plotting properly

Reported by: shermanl Owned by: joeb
Priority: normal Milestone: Ecopath 6: release 6.0.8
Component: Ecosim Version:
Severity: minor Keywords:
Cc:

Description (last modified by shermanl) (diff)

When a TimeSeries? is set to relative (starting point at 1), it scales the Ecosim output plot for that group.

Reported by Cathy Bulman. See two attachments below.

From: <Cathy.Bulman@…>
To: <drmbongo@…>

Hi Jeroen

I still can’t quite get whether this is a display problem or my non-understanding of how these time series (i.e. type relative Biomass) are rescaled>

EG. If you can see this plot for CPUE 35 first value for 1994 is 1. It is even plotted on the time series as 1. All my time series start at 1 so I didn’t think rescaling of any sort was necessary (Beth doesn’t believe so either)

But take a look at the Ecosim plot. The cursor is where the first of the time series 35 is plotted (i.e. at 0.67). Sorry yellow isn’t a good display colour!



So, if I’ve completely missed something here, could someone please explain the format for the rescaling.

Attachments

noname.jpg (43.8 KB) - added by shermanl 10 years ago.
noname2.jpg (38.9 KB) - added by shermanl 10 years ago.

Change History

Changed 10 years ago by shermanl

Changed 10 years ago by shermanl

comment:1 Changed 10 years ago by shermanl

  • Description modified (diff)

comment:2 Changed 10 years ago by jeroens

  • Milestone set to Ecopath 6

comment:3 Changed 10 years ago by jeroens

  • Component changed from Contaminant tracing to Ecosim
  • Severity changed from block to minor

comment:4 Changed 10 years ago by shermanl

  • Type set to not assessed

comment:5 Changed 10 years ago by shermanl

  • Milestone changed from Ecopath 6: build 6.0.7 to Ecopath 6: build 6.0.8

comment:6 Changed 10 years ago by shermanl

  • Owner joeb deleted
  • Status changed from new to assigned

comment:7 Changed 10 years ago by joeb

  • Owner set to joeb

comment:8 Changed 10 years ago by joeb

Relative Biomass timeseries values are scaled by mle (mean log error) and then made relative to the start biomass value (biomass from Ecopath) display value = obs(t)/exp(mle)/B0. This is the value that you see when you hover the cursor over a timeseries data point. Not the value in the data point. Would it be better to hide this value?

comment:9 Changed 10 years ago by joeb

  • Status changed from assigned to closed
  • Type changed from not assessed to assessed
  • Resolution set to not an issue
Note: See TracTickets for help on using tickets.