PiscesLogoSmallerStill General  instructions

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Start ECOM in the normal way, either by clicking on the desktop icon or by selecting the program via the Start button.

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

File: To create, open, save, export and print data.

Biological File: To select the file to open for the biological data.

Environmental File: To select the file to open for the environmental data.

Edit: To cut copy and paste to and from the active window and set the decimal points and precision of the display. Use this menu to assign samples to groups.

Ordination: To select the ordination methods

Variable Selection: To run a Redundancy or Correspondence analysis for selection of the most influential variables.

Monte Carlo: To run a Monte Carlo randomization on the data.

Regression: To select the multiple regression method.

Help: to enter the Help system and select the about box.

 

Main menu

 

Note: the Monte Carlo menu is disabled until you perform an Ordination analysis.

 

When the program is started, you will be presented with a blank working area. Assuming that you have data already prepared, from the Biological File menu choose Open Biological and from Environmental File menu choose Open Environmental to load existing data sets. Once a data set is loaded or a new data set created, the window will be filled by a form with tabs labelled Sample/Species Data,  Working Sample/Species Data, Environmental Data, Working Environmental Data, Summary and Scatter Plot.

 

MainWindow

 

The Raw Data forms, Sample/Species Data and Environmental Data show the data loaded from disc. The Working Data grids show the data sets upon which the calculations will be performed, Summary gives statistics for the data sets and Scatter Plot lets you select variables to plot as 2 and 3 dimensional graphs. You can switch between the different forms by clicking with the mouse on the tabs. Initially, the Raw Data and Working Data will display the same values. Once a transformation or some other adjustment has been applied to the data (for details see below) the Working Data grids will display the adjusted data.

 

Obtaining help

Opening a data set

Demonstration data sets

Creating and editing a data set

Maximum size of the data set and computation speed

Printing and exporting your results

Graph display options

Zooming and panning on graphs