Canonical Correspondence Analysis
44
Biplot   This button presents a grid of the coordinates of the tip of the environmental
variable vectors used in the ordination biplots to show species relationships to the
environmental variable (see 
Rank Plot
).
Inter   This button presents the correlation between the environmental variables and
the site (sample) scores calculated using the weighted average of the species. It is
termed the Inter set correlation.
Intra    This button presents the correlation between the environmental variables and
the site (sample) scores calculated using the regression of the environmental
variables with the site scores derived from the species. It is termed the Inter set
correlation. It is always larger than the intra set correlation.
These results can be printed or exported from the File menu and copied from the Edit
menu. See 
Export Active Grid
.
7.16
Monte Carlo Simulations
Monte Carlo randomization tests are only undertaken if selected from the
Randomization drop down menu. This menu allows you to select 100, 1000, and
10000 trials. It is a good idea to initially run only a hundred simulations as this
procedure can take a long time if you have a large data set.
For each simulation the order of the samples in the sample species array is randomly
shuffled and the Eigenvectors calculated as usual. By shuffling the order of the
samples we are breaking the correlation between the environmental variables and the
species. Thus there will not be any relationship. The probability measure given in the
Monte Carlo output grid is the probability that an Eigenvalue as large as that observed
could have occurred by chance. Also given in the table is the largest and smallest
Eigenvalues observed and the mean Eigenvalue. The calculations are only undertaken
for the 3 axes with the largest Eigenvalues as it is unlikely that you will have
significant variation explained by subsequent axes.
Copyright 2004  PISCES Conservation Ltd





Actions web hosting footer




 

 

 

 

Home | About Us | Network | Compare Plans | Support | FAQ | Control Panel | Order Online | Sitemap | Contact

Terms Of Service

servlet web hosting

 

Our web partners: Web Hosting PHP Jsp Web Hosting Java Web Hosting Jsp Web Hosting Cheapest Web Hosting  Java Web Hosting

Cheap Web Hosting Java Hosting Cheapest Hosting Quality Web Templates Best Web Templates Web Design Templates

Java Web Hosting Cheap Hosting Cheap Web Hosting Jsp Web Hosting Tomcat Web Hosting

Quality Web Hosting Best Web Hosting Java Web Hosting

Actionswebhosting.com Business web hosting division of Vision Web Hosting Inc. All rights reserved.