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Type 'q()' to quit R. > x <- array(list(733.6,0,844.9,0,864.3,0,833.5,0,814.9,0,820.4,0,710.8,0,773.1,0,801.2,0,832.9,0,808.3,0,817.2,0,745.5,0,932.6,0,1057.0,0,879.9,0,1089.5,0,903.0,0,846.1,0,959.1,0,952.0,0,1092.5,0,1188.9,0,996.7,0,1034.3,0,898.2,0,1111.6,0,900.5,0,1049.2,0,1010.9,0,875.9,0,849.9,0,713.4,1,918.6,1,912.5,1,767.0,1,902.2,1,891.9,1,874.0,1,930.9,1,944.2,1,935.9,1,937.1,1,885.1,1,892.4,1,987.3,1,946.3,1,799.6,1,875.4,1,846.2,1,880.6,1,885.7,1,868.9,1,882.5,1,789.6,1,773.3,1,804.3,1,817.8,1,836.7,1,721.8,1),dim=c(2,60),dimnames=list(c('y','x'),1:60)) > y <- array(NA,dim=c(2,60),dimnames=list(c('y','x'),1:60)) > for (i in 1:dim(x)[1]) + { + for (j in 1:dim(x)[2]) + { + y[i,j] <- as.numeric(x[i,j]) + } + } > par3 = 'No Linear Trend' > par2 = 'Include Monthly Dummies' > par1 = '1' > #'GNU S' R Code compiled by R2WASP v. 1.0.44 () > #Author: Prof. Dr. P. Wessa > #To cite this work: AUTHOR(S), (YEAR), YOUR SOFTWARE TITLE (vNUMBER) in Free Statistics Software (v$_version), Office for Research Development and Education, URL http://www.wessa.net/rwasp_YOURPAGE.wasp/ > #Source of accompanying publication: Office for Research, Development, and Education > #Technical description: Write here your technical program description (don't use hard returns!) > library(lattice) > par1 <- as.numeric(par1) > x <- t(y) > k <- length(x[1,]) > n <- length(x[,1]) > x1 <- cbind(x[,par1], x[,1:k!=par1]) > mycolnames <- c(colnames(x)[par1], colnames(x)[1:k!=par1]) > colnames(x1) <- mycolnames #colnames(x)[par1] > x <- x1 > if (par3 == 'First Differences'){ + x2 <- array(0, dim=c(n-1,k), dimnames=list(1:(n-1), paste('(1-B)',colnames(x),sep=''))) + for (i in 1:n-1) { + for (j in 1:k) { + x2[i,j] <- x[i+1,j] - x[i,j] + } + } + x <- x2 + } > if (par2 == 'Include Monthly Dummies'){ + x2 <- array(0, dim=c(n,11), dimnames=list(1:n, paste('M', seq(1:11), sep =''))) + for (i in 1:11){ + x2[seq(i,n,12),i] <- 1 + } + x <- cbind(x, x2) + } > if (par2 == 'Include Quarterly Dummies'){ + x2 <- array(0, dim=c(n,3), dimnames=list(1:n, paste('Q', seq(1:3), sep =''))) + for (i in 1:3){ + x2[seq(i,n,4),i] <- 1 + } + x <- cbind(x, x2) + } > k <- length(x[1,]) > if (par3 == 'Linear Trend'){ + x <- cbind(x, c(1:n)) + colnames(x)[k+1] <- 't' + } > x y x M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 1 733.6 0 1 0 0 0 0 0 0 0 0 0 0 2 844.9 0 0 1 0 0 0 0 0 0 0 0 0 3 864.3 0 0 0 1 0 0 0 0 0 0 0 0 4 833.5 0 0 0 0 1 0 0 0 0 0 0 0 5 814.9 0 0 0 0 0 1 0 0 0 0 0 0 6 820.4 0 0 0 0 0 0 1 0 0 0 0 0 7 710.8 0 0 0 0 0 0 0 1 0 0 0 0 8 773.1 0 0 0 0 0 0 0 0 1 0 0 0 9 801.2 0 0 0 0 0 0 0 0 0 1 0 0 10 832.9 0 0 0 0 0 0 0 0 0 0 1 0 11 808.3 0 0 0 0 0 0 0 0 0 0 0 1 12 817.2 0 0 0 0 0 0 0 0 0 0 0 0 13 745.5 0 1 0 0 0 0 0 0 0 0 0 0 14 932.6 0 0 1 0 0 0 0 0 0 0 0 0 15 1057.0 0 0 0 1 0 0 0 0 0 0 0 0 16 879.9 0 0 0 0 1 0 0 0 0 0 0 0 17 1089.5 0 0 0 0 0 1 0 0 0 0 0 0 18 903.0 0 0 0 0 0 0 1 0 0 0 0 0 19 846.1 0 0 0 0 0 0 0 1 0 0 0 0 20 959.1 0 0 0 0 0 0 0 0 1 0 0 0 21 952.0 0 0 0 0 0 0 0 0 0 1 0 0 22 1092.5 0 0 0 0 0 0 0 0 0 0 1 0 23 1188.9 0 0 0 0 0 0 0 0 0 0 0 1 24 996.7 0 0 0 0 0 0 0 0 0 0 0 0 25 1034.3 0 1 0 0 0 0 0 0 0 0 0 0 26 898.2 0 0 1 0 0 0 0 0 0 0 0 0 27 1111.6 0 0 0 1 0 0 0 0 0 0 0 0 28 900.5 0 0 0 0 1 0 0 0 0 0 0 0 29 1049.2 0 0 0 0 0 1 0 0 0 0 0 0 30 1010.9 0 0 0 0 0 0 1 0 0 0 0 0 31 875.9 0 0 0 0 0 0 0 1 0 0 0 0 32 849.9 0 0 0 0 0 0 0 0 1 0 0 0 33 713.4 1 0 0 0 0 0 0 0 0 1 0 0 34 918.6 1 0 0 0 0 0 0 0 0 0 1 0 35 912.5 1 0 0 0 0 0 0 0 0 0 0 1 36 767.0 1 0 0 0 0 0 0 0 0 0 0 0 37 902.2 1 1 0 0 0 0 0 0 0 0 0 0 38 891.9 1 0 1 0 0 0 0 0 0 0 0 0 39 874.0 1 0 0 1 0 0 0 0 0 0 0 0 40 930.9 1 0 0 0 1 0 0 0 0 0 0 0 41 944.2 1 0 0 0 0 1 0 0 0 0 0 0 42 935.9 1 0 0 0 0 0 1 0 0 0 0 0 43 937.1 1 0 0 0 0 0 0 1 0 0 0 0 44 885.1 1 0 0 0 0 0 0 0 1 0 0 0 45 892.4 1 0 0 0 0 0 0 0 0 1 0 0 46 987.3 1 0 0 0 0 0 0 0 0 0 1 0 47 946.3 1 0 0 0 0 0 0 0 0 0 0 1 48 799.6 1 0 0 0 0 0 0 0 0 0 0 0 49 875.4 1 1 0 0 0 0 0 0 0 0 0 0 50 846.2 1 0 1 0 0 0 0 0 0 0 0 0 51 880.6 1 0 0 1 0 0 0 0 0 0 0 0 52 885.7 1 0 0 0 1 0 0 0 0 0 0 0 53 868.9 1 0 0 0 0 1 0 0 0 0 0 0 54 882.5 1 0 0 0 0 0 1 0 0 0 0 0 55 789.6 1 0 0 0 0 0 0 1 0 0 0 0 56 773.3 1 0 0 0 0 0 0 0 1 0 0 0 57 804.3 1 0 0 0 0 0 0 0 0 1 0 0 58 817.8 1 0 0 0 0 0 0 0 0 0 1 0 59 836.7 1 0 0 0 0 0 0 0 0 0 0 1 60 721.8 1 0 0 0 0 0 0 0 0 0 0 0 > k <- length(x[1,]) > df <- as.data.frame(x) > (mylm <- lm(df)) Call: lm(formula = df) Coefficients: (Intercept) x M1 M2 M3 M4 845.465 -41.675 29.405 53.965 128.705 57.305 M5 M6 M7 M8 M9 M10 124.545 81.745 3.105 19.305 12.200 109.360 M11 118.080 > (mysum <- summary(mylm)) Call: lm(formula = df) Residuals: Min 1Q Median 3Q Max -155.245 -58.730 -3.612 69.205 225.355 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) 845.465 46.473 18.192 <2e-16 *** x -41.675 25.819 -1.614 0.1132 M1 29.405 62.179 0.473 0.6385 M2 53.965 62.179 0.868 0.3899 M3 128.705 62.179 2.070 0.0440 * M4 57.305 62.179 0.922 0.3614 M5 124.545 62.179 2.003 0.0510 . M6 81.745 62.179 1.315 0.1950 M7 3.105 62.179 0.050 0.9604 M8 19.305 62.179 0.310 0.7576 M9 12.200 61.965 0.197 0.8448 M10 109.360 61.965 1.765 0.0841 . M11 118.080 61.965 1.906 0.0628 . --- Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 Residual standard error: 97.97 on 47 degrees of freedom Multiple R-Squared: 0.263, Adjusted R-squared: 0.07478 F-statistic: 1.397 on 12 and 47 DF, p-value: 0.2009 > postscript(file="/var/www/html/rcomp/tmp/15lhm1197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > plot(x[,1], type='l', main='Actuals and Interpolation', ylab='value of Actuals and Interpolation (dots)', xlab='time or index') > points(x[,1]-mysum$resid) > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/25ovf1197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > plot(mysum$resid, type='b', pch=19, main='Residuals', ylab='value of Residuals', xlab='time or index') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/3e7s41197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > hist(mysum$resid, main='Residual Histogram', xlab='values of Residuals') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/4ynar1197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > densityplot(~mysum$resid,col='black',main='Residual Density Plot', xlab='values of Residuals') > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/541721197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > qqnorm(mysum$resid, main='Residual Normal Q-Q Plot') > grid() > dev.off() null device 1 > (myerror <- as.ts(mysum$resid)) Time Series: Start = 1 End = 60 Frequency = 1 1 2 3 4 5 6 7 8 -141.270 -54.530 -109.870 -69.270 -155.110 -106.810 -137.770 -91.670 9 10 11 12 13 14 15 16 -56.465 -121.925 -155.245 -28.265 -129.370 33.170 82.830 -22.870 17 18 19 20 21 22 23 24 119.490 -24.210 -2.470 94.330 94.335 137.675 225.355 151.235 25 26 27 28 29 30 31 32 159.430 -1.230 137.430 -2.270 79.190 83.690 27.330 -14.870 33 34 35 36 37 38 39 40 -102.590 5.450 -9.370 -36.790 69.005 34.145 -58.495 69.805 41 42 43 44 45 46 47 48 15.865 50.365 130.205 62.005 76.410 74.150 24.430 -4.190 49 50 51 52 53 54 55 56 42.205 -11.555 -51.895 24.605 -59.435 -3.035 -17.295 -49.795 57 58 59 60 -11.690 -95.350 -85.170 -81.990 > postscript(file="/var/www/html/rcomp/tmp/6k5k81197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > dum <- cbind(lag(myerror,k=1),myerror) > dum Time Series: Start = 0 End = 60 Frequency = 1 lag(myerror, k = 1) myerror 0 -141.270 NA 1 -54.530 -141.270 2 -109.870 -54.530 3 -69.270 -109.870 4 -155.110 -69.270 5 -106.810 -155.110 6 -137.770 -106.810 7 -91.670 -137.770 8 -56.465 -91.670 9 -121.925 -56.465 10 -155.245 -121.925 11 -28.265 -155.245 12 -129.370 -28.265 13 33.170 -129.370 14 82.830 33.170 15 -22.870 82.830 16 119.490 -22.870 17 -24.210 119.490 18 -2.470 -24.210 19 94.330 -2.470 20 94.335 94.330 21 137.675 94.335 22 225.355 137.675 23 151.235 225.355 24 159.430 151.235 25 -1.230 159.430 26 137.430 -1.230 27 -2.270 137.430 28 79.190 -2.270 29 83.690 79.190 30 27.330 83.690 31 -14.870 27.330 32 -102.590 -14.870 33 5.450 -102.590 34 -9.370 5.450 35 -36.790 -9.370 36 69.005 -36.790 37 34.145 69.005 38 -58.495 34.145 39 69.805 -58.495 40 15.865 69.805 41 50.365 15.865 42 130.205 50.365 43 62.005 130.205 44 76.410 62.005 45 74.150 76.410 46 24.430 74.150 47 -4.190 24.430 48 42.205 -4.190 49 -11.555 42.205 50 -51.895 -11.555 51 24.605 -51.895 52 -59.435 24.605 53 -3.035 -59.435 54 -17.295 -3.035 55 -49.795 -17.295 56 -11.690 -49.795 57 -95.350 -11.690 58 -85.170 -95.350 59 -81.990 -85.170 60 NA -81.990 > dum1 <- dum[2:length(myerror),] > dum1 lag(myerror, k = 1) myerror [1,] -54.530 -141.270 [2,] -109.870 -54.530 [3,] -69.270 -109.870 [4,] -155.110 -69.270 [5,] -106.810 -155.110 [6,] -137.770 -106.810 [7,] -91.670 -137.770 [8,] -56.465 -91.670 [9,] -121.925 -56.465 [10,] -155.245 -121.925 [11,] -28.265 -155.245 [12,] -129.370 -28.265 [13,] 33.170 -129.370 [14,] 82.830 33.170 [15,] -22.870 82.830 [16,] 119.490 -22.870 [17,] -24.210 119.490 [18,] -2.470 -24.210 [19,] 94.330 -2.470 [20,] 94.335 94.330 [21,] 137.675 94.335 [22,] 225.355 137.675 [23,] 151.235 225.355 [24,] 159.430 151.235 [25,] -1.230 159.430 [26,] 137.430 -1.230 [27,] -2.270 137.430 [28,] 79.190 -2.270 [29,] 83.690 79.190 [30,] 27.330 83.690 [31,] -14.870 27.330 [32,] -102.590 -14.870 [33,] 5.450 -102.590 [34,] -9.370 5.450 [35,] -36.790 -9.370 [36,] 69.005 -36.790 [37,] 34.145 69.005 [38,] -58.495 34.145 [39,] 69.805 -58.495 [40,] 15.865 69.805 [41,] 50.365 15.865 [42,] 130.205 50.365 [43,] 62.005 130.205 [44,] 76.410 62.005 [45,] 74.150 76.410 [46,] 24.430 74.150 [47,] -4.190 24.430 [48,] 42.205 -4.190 [49,] -11.555 42.205 [50,] -51.895 -11.555 [51,] 24.605 -51.895 [52,] -59.435 24.605 [53,] -3.035 -59.435 [54,] -17.295 -3.035 [55,] -49.795 -17.295 [56,] -11.690 -49.795 [57,] -95.350 -11.690 [58,] -85.170 -95.350 [59,] -81.990 -85.170 > z <- as.data.frame(dum1) > z lag(myerror, k = 1) myerror 1 -54.530 -141.270 2 -109.870 -54.530 3 -69.270 -109.870 4 -155.110 -69.270 5 -106.810 -155.110 6 -137.770 -106.810 7 -91.670 -137.770 8 -56.465 -91.670 9 -121.925 -56.465 10 -155.245 -121.925 11 -28.265 -155.245 12 -129.370 -28.265 13 33.170 -129.370 14 82.830 33.170 15 -22.870 82.830 16 119.490 -22.870 17 -24.210 119.490 18 -2.470 -24.210 19 94.330 -2.470 20 94.335 94.330 21 137.675 94.335 22 225.355 137.675 23 151.235 225.355 24 159.430 151.235 25 -1.230 159.430 26 137.430 -1.230 27 -2.270 137.430 28 79.190 -2.270 29 83.690 79.190 30 27.330 83.690 31 -14.870 27.330 32 -102.590 -14.870 33 5.450 -102.590 34 -9.370 5.450 35 -36.790 -9.370 36 69.005 -36.790 37 34.145 69.005 38 -58.495 34.145 39 69.805 -58.495 40 15.865 69.805 41 50.365 15.865 42 130.205 50.365 43 62.005 130.205 44 76.410 62.005 45 74.150 76.410 46 24.430 74.150 47 -4.190 24.430 48 42.205 -4.190 49 -11.555 42.205 50 -51.895 -11.555 51 24.605 -51.895 52 -59.435 24.605 53 -3.035 -59.435 54 -17.295 -3.035 55 -49.795 -17.295 56 -11.690 -49.795 57 -95.350 -11.690 58 -85.170 -95.350 59 -81.990 -85.170 > plot(z,main=paste('Residual Lag plot, lowess, and regression line'), ylab='values of Residuals', xlab='lagged values of Residuals') > lines(lowess(z)) > abline(lm(z)) > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/7gdax1197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > acf(mysum$resid, lag.max=length(mysum$resid)/2, main='Residual Autocorrelation Function') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/8zf0s1197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > pacf(mysum$resid, lag.max=length(mysum$resid)/2, main='Residual Partial Autocorrelation Function') > grid() > dev.off() null device 1 > postscript(file="/var/www/html/rcomp/tmp/9pxn81197645014.ps",horizontal=F,pagecentre=F,paper="special",width=8.3333333333333,height=5.5555555555556) > opar <- par(mfrow = c(2,2), oma = c(0, 0, 1.1, 0)) > plot(mylm, las = 1, sub='Residual Diagnostics') > par(opar) > dev.off() null device 1 > load(file='/var/www/html/rcomp/createtable') > a<-table.start() > a<-table.row.start(a) > a<-table.element(a, 'Multiple Linear Regression - Estimated Regression Equation', 1, TRUE) > a<-table.row.end(a) > myeq <- colnames(x)[1] > myeq <- paste(myeq, '[t] = ', sep='') > for (i in 1:k){ + if (mysum$coefficients[i,1] > 0) myeq <- paste(myeq, '+', '') + myeq <- paste(myeq, mysum$coefficients[i,1], sep=' ') + if (rownames(mysum$coefficients)[i] != '(Intercept)') { + myeq <- paste(myeq, rownames(mysum$coefficients)[i], sep='') + if (rownames(mysum$coefficients)[i] != 't') myeq <- paste(myeq, '[t]', sep='') + } + } > myeq <- paste(myeq, ' + e[t]') > a<-table.row.start(a) > a<-table.element(a, myeq) > a<-table.row.end(a) > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/107otu1197645014.tab") > a<-table.start() > a<-table.row.start(a) > a<-table.element(a,hyperlink('http://www.xycoon.com/ols1.htm','Multiple Linear Regression - Ordinary Least Squares',''), 6, TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a,'Variable',header=TRUE) > a<-table.element(a,'Parameter',header=TRUE) > a<-table.element(a,'S.D.',header=TRUE) > a<-table.element(a,'T-STAT
H0: parameter = 0',header=TRUE) > a<-table.element(a,'2-tail p-value',header=TRUE) > a<-table.element(a,'1-tail p-value',header=TRUE) > a<-table.row.end(a) > for (i in 1:k){ + a<-table.row.start(a) + a<-table.element(a,rownames(mysum$coefficients)[i],header=TRUE) + a<-table.element(a,mysum$coefficients[i,1]) + a<-table.element(a, round(mysum$coefficients[i,2],6)) + a<-table.element(a, round(mysum$coefficients[i,3],4)) + a<-table.element(a, round(mysum$coefficients[i,4],6)) + a<-table.element(a, round(mysum$coefficients[i,4]/2,6)) + a<-table.row.end(a) + } > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/11xh3c1197645014.tab") > a<-table.start() > a<-table.row.start(a) > a<-table.element(a, 'Multiple Linear Regression - Regression Statistics', 2, TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Multiple R',1,TRUE) > a<-table.element(a, sqrt(mysum$r.squared)) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'R-squared',1,TRUE) > a<-table.element(a, mysum$r.squared) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Adjusted R-squared',1,TRUE) > a<-table.element(a, mysum$adj.r.squared) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'F-TEST (value)',1,TRUE) > a<-table.element(a, mysum$fstatistic[1]) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'F-TEST (DF numerator)',1,TRUE) > a<-table.element(a, mysum$fstatistic[2]) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'F-TEST (DF denominator)',1,TRUE) > a<-table.element(a, mysum$fstatistic[3]) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'p-value',1,TRUE) > a<-table.element(a, 1-pf(mysum$fstatistic[1],mysum$fstatistic[2],mysum$fstatistic[3])) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Multiple Linear Regression - Residual Statistics', 2, TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Residual Standard Deviation',1,TRUE) > a<-table.element(a, mysum$sigma) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Sum Squared Residuals',1,TRUE) > a<-table.element(a, sum(myerror*myerror)) > a<-table.row.end(a) > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/12no1t1197645014.tab") > a<-table.start() > a<-table.row.start(a) > a<-table.element(a, 'Multiple Linear Regression - Actuals, Interpolation, and Residuals', 4, TRUE) > a<-table.row.end(a) > a<-table.row.start(a) > a<-table.element(a, 'Time or Index', 1, TRUE) > a<-table.element(a, 'Actuals', 1, TRUE) > a<-table.element(a, 'Interpolation
Forecast', 1, TRUE) > a<-table.element(a, 'Residuals
Prediction Error', 1, TRUE) > a<-table.row.end(a) > for (i in 1:n) { + a<-table.row.start(a) + a<-table.element(a,i, 1, TRUE) + a<-table.element(a,x[i]) + a<-table.element(a,x[i]-mysum$resid[i]) + a<-table.element(a,mysum$resid[i]) + a<-table.row.end(a) + } > a<-table.end(a) > table.save(a,file="/var/www/html/rcomp/tmp/1328zf1197645014.tab") > > system("convert tmp/15lhm1197645014.ps tmp/15lhm1197645014.png") > system("convert tmp/25ovf1197645014.ps tmp/25ovf1197645014.png") > system("convert tmp/3e7s41197645014.ps tmp/3e7s41197645014.png") > system("convert tmp/4ynar1197645014.ps tmp/4ynar1197645014.png") > system("convert tmp/541721197645014.ps tmp/541721197645014.png") > system("convert tmp/6k5k81197645014.ps tmp/6k5k81197645014.png") > system("convert tmp/7gdax1197645014.ps tmp/7gdax1197645014.png") > system("convert tmp/8zf0s1197645014.ps tmp/8zf0s1197645014.png") > system("convert tmp/9pxn81197645014.ps tmp/9pxn81197645014.png") > > > proc.time() user system elapsed 2.236 1.431 2.858