Changes between Version 3 and Version 4 of EwEugImportTimeSeries


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Timestamp:
2010-11-23 02:09:20 (9 years ago)
Author:
shermanl
Comment:

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  • EwEugImportTimeSeries

    v3 v4  
    11== 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). 
     2There 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). 
    33 
    44'''The time series data file''' 
     
    34347 Average weight (stanzas only) 
    3535 
    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 ) 
    3737 
    3838** 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)]). 
     
    4444Important note. After importing a time series file, you must weight the time series using the Time series form. 
    4545 
    46 Note that you must already have an Ecosim scenario loaded before you can import a time series data file (see [wiki:EwEugEcosimMenu Ecosim menu] for instructions for creating and loading Ecosim scenarios). 
     46Note 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). 
    4747 
    4848The 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: