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Start Growth II in the normal Windows fashion either by clicking on the desktop icon or from the Start menu. The program appears with no open data set, as shown below:

 

initial blank screen

 

Most of the menus will not become active until a data set is opened or created.

 

File: To open and create data sets, save files and print results.

 

To open an existing data set click on File|Open as follows:

 

opening a file

 

 

To get you started, Growth II comes with numerous demo data sets; see for example fitting seasonal data.

 

For example use File|Open to find and open sole monthly.csv (saved by default during installation in the folder C:\program files\GrowthII\GrowthDemoData)

 

This will give a plot of the data in a tabbed output, and a number of the drop-down menus will be activated. Upon opening the data set Growth II has automatically fitted a von Bertalanffy growth equation using non-linear methods. Do not worry if you wish to fit another model - this is easily accomplished.

 

 

initial screen with open data

 

Along the top bar are a number of drop-down menus. These work in the same way as most standard Windows programs.

File: To open and create data sets, save files and print results.

Copy: To copy or export the graph or the data and predicted results.

Age/size: To select a model to apply to age (time) size data.

Seasonal Age/size: To fit a seasonal growth model to age size data.

Incremental: To fit a growth model to incremental data.

Help: to enter the Help system. Context-specific help can also be obtained for each method by opening its window and then clicking on the right hand mouse button, or by pressing the F1 key on your keyboard.

 

Below these pull-down menus is a series of buttons, each displaying a standard symbol:

 

graphics tool bar

This is the graphics tool bar which will allow you to edit your plots.

 

Below the plot there is a table which gives the the parameter estimates for the model and model fitting diagnostics (see above).

 

At the bottom there are a series of tabs that you can click on to select various data and output displays.

 

example of tabs

The tabs displayed will depend on the data set entered. The full list of tabs is as follows:

 

Classed Data: This tab shows age and size data. For example, it will be displayed if you have entered or opened a data set that comprises age and length data for individual organisms.

Calculations: This tab presents the observed and predicted values.

Length results: This tab presented a plot of the observed and predicted fit plus model parameters and diagnostics for length data.

Weight results: This tab presented a plot of the observed and predicted fit plus model parameters and diagnostics for weight data.

L Gulland: This presents a Gulland plot (incremental change in length against length).

L Ford-Walford: This presents a Ford-Walford plot (length at age t+1 against length at age t)

W Gulland: This presents a Gulland plot (incremental change in weight against weight).

W Ford-Walford: This presents a Ford-Walford plot (weight at age t+1 against weight at age t)