R version 2.8.0 (2008-10-20) Copyright (C) 2008 The R Foundation for Statistical Computing ISBN 3-900051-07-0 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > z <- c(105,101,105,101,88,108,116,104,110,105,107,124,109,102,125,102,101,116,114,115,119,108,110,120,113,111,121,99,104,117,108,122,122,111,111,131,108,118,119,104,105,118,124,123,114,119,116,129,112,123,124,117,110,118,135,127,117,137,130,132,142,122,126) > y <- c(105,105,109,106,82,114,118,105,105,103,107,123,112,104,122,108,94,120,118,117,113,106,108,122,115,110,120,104,96,121,111,120,114,107,108,127,105,119,121,106,97,119,122,121,106,114,112,127,109,118,123,115,105,116,131,121,104,127,126,124,132,117,123) > x <- c(101,104,99,105,107,111,117,119,127,128,135,132,136,143,142,153,145,138,148,152,169,169,161,174,179,191,190,182,175,181,197,194,197,216,221,218,230,227,204,197,199,208,191,202,211,224,224,231,244,235,250,266,288,283,295,312,334,348,383,407,414,363,322) > (rho12 <- cor(x, y)) [1] 0.4815225 > (rho23 <- cor(y, z)) [1] 0.9082763 > (rho13 <- cor(x, z)) [1] 0.6908341 > (rhoxy_z <- (rho12-(rho13*rho23))/(sqrt(1-(rho13*rho13)) * sqrt(1-(rho23*rho23)))) [1] -0.4824849 > (rhoxz_y <- (rho13-(rho12*rho23))/(sqrt(1-(rho12*rho12)) * sqrt(1-(rho23*rho23)))) [1] 0.6912909 > (rhoyz_x <- (rho23-(rho12*rho13))/(sqrt(1-(rho12*rho12)) * sqrt(1-(rho13*rho13)))) [1] 0.9083926 > > #Note: the /var/www/html/freestat/rcomp/createtable file can be downloaded at http://www.wessa.net/cretab > load(file="/var/www/html/freestat/rcomp/createtable") > > a<-table.start() > a<-table.row.start(a) > a<-table.element(a,'Pearson Product Moment Partial Correlation - Ungrouped Data',2,TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Statistic',1,TRUE) > a<-table.element(a,'Value',1,TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Correlation r(xy)',header=TRUE) > a<-table.element(a,rho12) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,hyperlink('http://www.xycoon.com/partial_correlation1.htm','Partial Correlation r(xy.z)',''),header=TRUE) > a<-table.element(a,rhoxy_z) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Correlation r(xz)',header=TRUE) > a<-table.element(a,rho13) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,hyperlink('http://www.xycoon.com/partial_correlation1.htm','Partial Correlation r(xz.y)',''),header=TRUE) > a<-table.element(a,rhoxz_y) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Correlation r(yz)',header=TRUE) > a<-table.element(a,rho23) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,hyperlink('http://www.xycoon.com/partial_correlation1.htm','Partial Correlation r(yz.x)',''),header=TRUE) > a<-table.element(a,rhoyz_x) > a<-table.row.end(a) > a<-table.end(a) > table.save(a,file="/var/www/html/freestat/rcomp/tmp/1fq4b1226353174.tab") > > > > proc.time() user system elapsed 0.273 0.018 0.301