Changes between Version 3 and Version 4 of EwEugImportTimeSeries
- Timestamp:
- 2010-11-23 02:09:20 (13 years ago)
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EwEugImportTimeSeries
v3 v4 1 1 == 8.6 Import time series == 2 There are two main types of data that you can read in to Ecosim: historical comparison data and time forcing data. Historical comparison data enable comparison between historical observations and the model ’s predictions. Time forcing data are used to actually force certain variables (fishing effort, fishing mortality) in the model (i.e., ‘drive’the model). You can load both types of data with the same data file, using the codes for different data types listed below (forcing data types are indicated in parentheses).2 There are two main types of data that you can read in to Ecosim: historical comparison data and time forcing data. Historical comparison data enable comparison between historical observations and the model's predictions. Time forcing data are used to actually force certain variables (fishing effort, fishing mortality) in the model (i.e., 'drive' the model). You can load both types of data with the same data file, using the codes for different data types listed below (forcing data types are indicated in parentheses). 3 3 4 4 '''The time series data file''' … … 34 34 7 Average weight (stanzas only) 35 35 36 * The software takes the ratio of ‘observed’ to estimated value for the years where there are observations, log it, ln(Oi/Ei). Then we estimate a scaling factor, S, as, S = exp[sum(ln(Oi/Ei))/count(i)]. Each of the observations is then plotted on top of the estimated value as Oi / S. (Oi Observed parameter no i, Ei Estimated parameter no i )36 * The software takes the ratio of 'observed' to estimated value for the years where there are observations, log it, ln(Oi / Ei). Then we estimate a scaling factor, S, as, S = exp[sum(ln(Oi / Ei))/count(i)]. Each of the observations is then plotted on top of the estimated value as Oi / S. (Oi Observed parameter no i, Ei Estimated parameter no i ) 37 37 38 38 ** Using data type 2, you can force nutrient concentrations (see [wiki:EwEugEcosimParameters Ecosim parameters] and links therein); parameters that affect trophic interactions through abiotic factors (see [wiki:EwEugForcingFunction Forcing function] and [wiki:EwEugApplyForcingFunctionConsumer Apply FF (consumer)]) or primary production (see [wiki:EwEugApplyForcingFunctionPrimaryProducer Apply FF (primary producer)]). … … 44 44 Important note. After importing a time series file, you must weight the time series using the Time series form. 45 45 46 Note that you must already have an Ecosim scenario loaded before you can import a time series data file (see [ wiki:EwEugEcosimMenuEcosim menu] for instructions for creating and loading Ecosim scenarios).46 Note that you must already have an Ecosim scenario loaded before you can import a time series data file (see [EwEugGettingStartedEcosim Ecosim menu] for instructions for creating and loading Ecosim scenarios). 47 47 48 48 The Import time series dialogue box (Figure 8.8) allows you to load time series data stored in CSV (comma separated values) or similar text format. It can be accessed: