15
ECOM II
4
Creating and editing data sets
Creating and editing a data set
Preparing large data sets in a spreadsheet program
Large data files
Data entry from within ECOM
Editing existing data
Saving edited data or creating a new data file
Maximum size of the data and computation speed
4.1
Creating and editing a data set
You are recommended to prepare large data sets using a standard spread sheet
program such as Excel. Small data sets can be created directly within ECOM, but
editing facilities are limited. Both the biological and physical data are organised in the
same way and stored as a CSV, comma delimited file.
Preparing large data sets in a spreadsheet program
Data entry from within ECOM
Editing existing data
Saving edited data or creating a new data file
4.2
Preparing large data sets in a spreadsheet program
The best way to enter large data sets is to use a spreadsheet such as Excel or Lotus
1 2 3.
A biological or environmental data set is stored as a comma delimited text file with
the extension .csv. It has the following form:
A biological data set:
    
           Title1
Title2
Title3
Species1
21
1
5
Species2
15
5
0
Species3
0
7
0
Species4
1
9
0
Species5
0
0
8
An environmental data set:
    
Title1        Title2      
Title3
Variable 1
10
14
58
Variable 2
5
5
0
Variable 3
0
7
0
Variable 4
1
1
1
Variable 5
0
0
1
The normal arrangement of community data within ECOM is to have the samples
(quadrats) as columns and the species or environmental variables as the rows. The
data can be arranged with the species forming the columns as the transpose option
within ECOM can be used to switch columns and rows. Numbers can be either integer
or real.
You do not need to create this file within ECOM. It can be created using Microsoft
Copyright 2004  PISCES Conservation Ltd





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