correlation {RGeostats}  R Documentation 
Plot the [shifted] correlation, for one or two variables
correlation(db, name1=1, name2=NA, db2=NA, name.size=NA, ndisc=100,flag.plot=TRUE, flag.same=TRUE, flag.regr=FALSE, flag.iso=FALSE,flag.diag=FALSE,flag.ce=FALSE,flag.aspoint=FALSE, nbr.ce=10,dmin=NA,dmax=NA,dirvect = NA,tolang = NA,opt.code= 0, tolcode = 0,mini1=NA, maxi1=NA, mini2=NA, maxi2=NA, size0=0.01, reg.lty=1, reg.lwd=1, reg.col= "black", reg.type="l", reg.pch=19, ce.lty=1, ce.lwd=1, ce.col= "black", ce.type="l", ce.pch=19, diag.lty=1, diag.lwd=1, diag.col= "black", xlab=NA, ylab=NA, title=NA, verbose=FALSE,...)
db 
The 
name1 
Rank of the column containing the first target variable 
name2 
Rank of the column containing the second target variable 
db2 
If 'db2' is specified, the second variable is read from this Db. This option is only available when 'flag.same'=TRUE. This Db2 must have exactly the same organization as 'Db'. 
name.size 
When the argument 'flag.aspoint' has been switched ON, the samples
are represented as circles. If the argument 'name.size' is defined
(as a valid attribute of 
ndisc 
Number of discretization steps along each axis for graphic representation 
flag.plot 
TRUE if the correlation plot is produced. 
flag.same 
TRUE if the variables must be compared at the same location (standard correlation). FALSE for the shifted correlation. 
flag.regr 
When TRUE, represent the regression line of the variable 'name2' as a function of the variable 'name1'. Warning: This option is not available for shifted correlation. 
flag.iso 
When TRUE, the axes are the same, calculated from the minimum of both variables to the maximum of both variables. 
flag.diag 
When TRUE, represent the diagonal between the lower left and the upper right corners 
flag.ce 
When TRUE, represent the experimental conditional expectation 
flag.aspoint 
When TRUE, the different symbols are represented as circles (of constant or varying radii). When FALSE, the samples are migrated onto an internal fine grid. Then the density of samples per grid node is displayed using a colored raster representation of this internal grid. Warning: This option is not available for the shifted correlation. 
nbr.ce 
Number of intervals (along the definition interval of the explanatory variable) used to calculate the experimental conditional expectation. 
dmin 
Minimum distance for the calculation of the shifted correlation 
dmax 
Maximum distance for the calculation of the shifted correlation 
dirvect 
The directions in which the shifted correlation must be calculated.
For more information, refer to 
tolang 
Angular tolerance. If no angular tolerance is not defined, the tolerance is set to 90 degrees. 
opt.code 
Option concerning the sample codes for constituting pairs:

tolcode 
Maximum distance between the codes of the two samples. 
reg.lty 
Type of the line used to represent the linear regression. 
reg.lwd 
Thickness of the line used to represent the linear regression. 
reg.col 
Color of the line used to represent the linear regression. 
reg.type 
Type of the line used to represent the linear regression. 
reg.pch 
Type of symbol used to represent the linear regression (only if reg.type="b") 
diag.lty 
Type of the line used to represent the first bissector. 
diag.lwd 
Thickness of the line used to represent the first bissector. 
diag.col 
Color of the line used to represent the first bissector. 
ce.lty 
Type of the line used to represent the linear regression. 
ce.lwd 
Thickness of the line used to represent the experimental conditional expectation. 
ce.col 
Color of the line used to represent the experimental conditional expectation. 
ce.type 
Type of the line used to represent the experimental conditional expectation. 
ce.pch 
Type of symbol used to represent the experimental conditional expectation. (only if ce.type="b") 
mini1 
Minimum value for the first target variable 
maxi1 
Maximum value for the first target variable 
mini2 
Minimum value for the second target variable 
maxi2 
Maximum value for the second target variable 
size0 
Constant size assigned to the symbols (only used if flag.aspoint=TRUE) 
xlab,ylab 
Labels for the graphic, arguments used by the Splus function "plot" 
title 
Title to be displayed (optional) 
verbose 
When TRUE, the calculation of the correlation and (optionally) the regression line produces verbose outputs. 
... 
Parameters transmitted to the functions 
When one variable is provided, the function calculates: Correl(Z1(x),Z1(x+h)) For two variables, the function calculates: Correl(Z1(x),Z2(x+h))
The correlation coefficient.