Hi,
I created a matrix of correlation coefficients and their respective scatterplots using the commands hetcor() and panel.cor().  Can I edit this matrix?  I would like to have the scale values display at the top, as opposed to the alternating top-bottom scale approach.  Also, I would like to increase the font size of the graphic for print purposes.  Any help on how to accomplish this would be greatly appreciated!
Thanks,
Mark
Here is the code I am using for this analysis:
data <- read.table("X:/GWRclip/corrmatrix.txt", header = T) 
ASHDEP <- data [,1]
ELE <- data [,2]
SLP <- data [,3]
ASP <- data [,4]
PLCU <- data [,5]
PRCU <- data [,6]
CTI <- data [,7]
STI <- data [,8]
SPI <- data [,9]
data <- data.frame(ASHDEP, ELE, SLP, ASP, PLCU, PRCU, CTI, STI, SPI)
hetcor(data) # Pearson, polychoric, and polyserial correlations, 2-step est.
hetcor(ASHDEP, ELE, SLP, ASP, PLCU, PRCU, CTI, STI, SPI, ML=TRUE) 
# Pearson, polychoric, polyserial correlations, ML est.

panel.cor <- function(x, y, digits=2, prefix="", cex.cor) { 
    usr <- par("usr"); on.exit(par(usr)) 
    par(usr = c(0,1,0,1)) 
    r <- (cor(x, y)) 
    txt <- format(c(r, 0.123456789), digits=digits)[1] 
    txt <- paste(prefix, txt, sep="") 
    if(missing(cex.cor))  
    text(0.5, 0.5, txt) 
} 
pairs( data[c(1, 2:9 )], main = "Partial Correlation Coefficients for Selected Soil-Terrain Attributes", 
       upper.panel=panel.smooth, lower.panel=panel.cor ) 

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Mark Kimsey 
Research Assistant 
Intermountain Forest Tree Nutrition Cooperative 
University of Idaho 
Moscow, Idaho 83844-1133 
------------------------ 
Work: 208.885.7520 
Mobile: 509.330.0640 
Fax: 208.885.7442 
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