3
ECOM II
1
Contents
Introduction
Getting started
System requirements
Installation
Quick guide to running a data set
General instructions
Common errors and problems
Using ECOM   Worked example
Entering your data
Maximum size of the data set and computation speed
Preparing large data sets in a spreadsheet program
Data entry from within ECOM
Demonstration data sets
Transforming and adjusting your data
Data transformations
Relativisations
Dealing with zeros
Transposing data
Transforming environmental variables
Data set statistics
Data set statistics
The available methods
Methods offered by ECOM
Changing graphs
Graph display options
Zooming and panning on graphs
Tips for improving graphical output
Output
The output screens
Sample Correspondence Check
Printing and output
Exporting tabulated data
Demos and Help
Demonstration version of ECOM
Contacting PISCES for help
References
Other Programs by PISCES Conservation Ltd
1.1
Introduction
ECOM offers a range of analytical techniques for visualising and ordering the
relationships in multivariate data commonly used by community ecologists including
Canonical Correspondence Analysis (CCA), Redundancy Analysis (RA) and Multiple
Regression (MR). Researchers in other fields such as palaeontology, archaeology and
Copyright 2004  PISCES Conservation Ltd





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