Correlation {DiGGer} | R Documentation |
Create a Correlation
object component of a DiGGer objective.
Correlation(rowModel = "AR", rowParameter = 0.5, columnModel = "AR", columnParameter = 0.5, spatialVarianceRatio = 1)
rowModel |
The correlation pattern between rows may be "AR" AutoRegressive, "MA" Moving Average, or "ID" no correlation. |
rowParameter |
Valid parameter values p, for "AR" -1<p<1, for "MA" -0.5<p<0.5 and for "ID" p=0. |
columnModel |
As for |
columnParameter |
As for |
spatialVarianceRatio |
The variance component ratio associated with the correlation between experimental units. |
The correlation in an "AR" process with parameter p decreases with separation according to p^|i-j| where |i-j| is the separation between rows or columns. The correlation in an "MA" process is p for adjacent rows or columns and 0 otherwise. There is no correlation between rows or columns for an identity, "ID", model.
.rmod |
Row model of correlation object. |
.rhor |
Correlation parameter for rows. |
.cmod |
Column model of correlation object. |
.rhoc |
Correlation parameter for columns. |
.gamma |
Variance component ratio of correlation object. |
Neil Coombes