Hi If I understand correctly you want Li and CR appear in one plot with the same x axis. Although it is not usually recommended you could use twoord.plot from plotrix or undocumented code below.
plot.yy <- function (x, yright, yleft, yleftlim = NULL, yrightlim = NULL, xlab = NULL, yylab = list(NA, NA), pch = c(1, 2), col = c(1, 2), linky = F, smooth = 0, lwds = 1, length = 10, format = "%d/%m", rect = NULL, type = "p", ...) { par(mar = c(5, 4, 4, 2), oma = c(0, 0, 0, 3)) plot(x, yright, ylim = yrightlim, axes = F, ylab = "", xlab = xlab, pch = pch[1], col = col[1], type = type, ...) if (!is.null(rect)) rect(x[rect[1]], rect[2], x[rect[3]], rect[4], col = "grey") points(x, yright, ylim = yrightlim, ylab = "", xlab = xlab, pch = pch[1], col = col[1], ...) axis(4, pretty(range(yright, na.rm = T), 10), col = col[1]) if (linky) lines(x, yright, col = col[1], ...) if (smooth != 0) lines(supsmu(x, yright, span = smooth), col = col[1], lwd = lwds, ...) if (is.na(yylab[[1]])) mtext(deparse(substitute(yright)), side = 4, outer = T, line = 1, col = col[1], ...) else mtext(yylab[[1]], side = 4, outer = T, line = 1, col = col[1], ...) par(new = T) plot(x, yleft, ylim = yleftlim, ylab = "", axes = F, xlab = xlab, pch = pch[2], col = col[2], ...) box() axis(2, pretty(range(yleft, na.rm = T), 10), col = col[2], col.axis = col[2]) if (!inherits(x, c("Date", "POSIXt"))) axis(1, pretty(range(x, na.rm = T), 10)) else { l <- length(x) axis(1, at = x[seq(1, l, length = length)], labels = format(as.POSIXct(x[seq(1, l, length = length)]), format = format)) } if (is.na(yylab[[2]])) mtext(deparse(substitute(yleft)), side = 2, line = 2, col = col[2], ...) else mtext(yylab[[2]], side = 2, line = 2, col = col[2], ...) if (linky) lines(x, yleft, col = col[2], lty = 2, ...) if (smooth != 0) lines(supsmu(x, yleft, span = smooth), col = col[2], lty = 2, lwd = lwds, ...) } something like plot.yy(Year, Li, CR) Cheers Petr > -----Original Message----- > From: R-help <r-help-boun...@r-project.org> On Behalf Of Ogbos Okike > Sent: Thursday, November 29, 2018 2:33 PM > To: r-help <r-help@r-project.org> > Subject: [R] Correct x-axis of two in one graph > > Dear Contributors, > > I have a data of the form: > 4 8 10 8590 12516 > 4 8 11 8641 98143 > 4 8 12 8705 98916 > 4 8 13 8750 89911 > 4 8 14 8685 104835 > 4 8 15 8629 121963 > 4 8 16 8676 77655 > 4 8 17 8577 81081 > 4 8 18 8593 83385 > 4 8 19 8642 112164 > 4 8 20 8708 103684 > 4 8 21 8622 83982 > 4 8 22 8593 75944 > 4 8 23 8600 97036 > 4 8 24 8650 104911 > 4 8 25 8730 114098 > 4 8 26 8731 99421 > 4 8 27 8715 85707 > 4 8 28 8717 81273 > 4 8 29 8739 106462 > 4 8 30 8684 110635 > 4 8 31 8713 105214 > 4 9 1 8771 92456 > 4 9 2 8759 109270 > 4 9 3 8762 99150 > 4 9 4 8730 77306 > 4 9 5 8780 86324 > 4 9 6 8804 90214 > 4 9 7 8797 99894 > 4 9 8 8863 95177 > 4 9 9 8873 95910 > 4 9 10 8827 108511 > 4 9 11 8806 115636 > 4 9 12 8869 85542 > 4 9 13 8854 111018 > 4 9 14 8571 93247 > 4 9 15 8533 85105 > 4 9 16 8553 114725 > 4 9 17 8561 122195 > 4 9 18 8532 100945 > 4 9 19 8560 108552 > 4 9 20 8634 108707 > 4 9 21 8646 117420 > 4 9 22 8633 113823 > 4 9 23 8680 82763 > 4 9 24 8765 121072 > 4 9 25 8756 89835 > 4 9 26 8750 104578 > 4 9 27 8790 88429 > 4 9 28 8824 84022 > 4 9 29 8843 80413 > 4 9 30 8795 118462 > 4 10 1 8795 139761 > 4 10 2 8805 103049 > 4 10 3 8826 104996 > 4 10 4 8841 104496 > 4 10 5 8882 75603 > 4 10 6 8865 89768 > 4 10 7 8875 93353 > 4 10 8 8898 98410 > 4 10 9 8920 114540 > 4 10 10 8937 95220 > 4 10 11 8926 104083 > 4 10 12 8912 106089 > 4 10 13 8898 116228 > 4 10 14 8926 149610 > 4 10 15 8954 109594 > 4 10 16 8941 75008 > 4 10 17 8952 119182 > 4 10 18 9003 151011 > 4 10 19 9002 146797 > 4 10 20 8995 145769 > 4 10 21 8969 121248 > 4 10 22 8954 107991 > 4 10 23 8992 128 > 4 10 24 8981 23036 > 4 10 25 8920 137485 > 4 10 26 8899 131756 > 4 10 27 8913 108729 > 4 10 28 8874 109478 > 4 10 29 8846 119627 > 4 10 30 8867 89999 > 4 10 31 8868 64833 > 4 11 1 9004 95864 > 4 11 2 9028 82322 > 4 11 3 8969 95591 > 4 11 4 8932 69378 > 4 11 5 8929 74281 > 4 11 6 8916 103261 > 4 11 7 8807 92473 > 4 11 8 8449 84344 > 4 11 9 8484 127415 > 4 11 10 8148 123826 > 4 11 11 8282 100029 > 4 11 12 8305 76205 > 4 11 13 8380 105162 > 4 11 14 8530 119533 > 4 11 15 8642 106490 > 4 11 16 8780 114771 > 4 11 17 8890 55593 > 4 11 18 8962 227 > 4 11 19 8949 109699 > 4 11 20 8974 86004 > 4 11 21 8956 74496 > 4 11 22 8881 109350 > 4 11 23 8872 134020 > 4 11 24 8847 105212 > 4 11 25 8868 91512 > where columns 1= year 2004, 2 = month, 3= day, 4= CR data, 5= Lightning data. > > The data range is 2004/8/10 to 2008/8/22. > With the code below: > data <- read.table("CRandWWLLNremzro", col.names = c("year", "month", > "day", "CR","WW")) > > > new.century <- data$year < 50 > > data$year <- ifelse(new.century, data$year + 2000, data$year + 1900) > > data$date <- as.Date(ISOdate(data$year, data$month, data$day)) > x = data$date > CR = data$CR > WWLLN=data$WW > > Year<-x > Li<-WWLLN > CR<-CR > > setEPS() > postscript("twoinone2.eps") > par(mar = c(5, 4, 4, 4) + 2) # Leave space for z axis > library(plotrix) > plot(Year,Li,pch=16,axes=F,xlab="",ylab="",type="l",col="black") > axis(2, col="black",las=1) ## las=1 makes horizontal labels > mtext("Lightning Stroke/day", side=2, line=4) > #box() > par(new=TRUE) > plot(Year,CR, pch=15, xlab="",ylab="",axes=FALSE,type="l",col="red") > mtext("GCR count/day",side=4,col="red",line=3) > axis(4, ylim=c(-7499,9684), col="red",col.axis="red",las=1) > > > > axis(side=1) ## > mtext("YEAR",side=1,col="black",line=2.5) > mtext("Long-term Variation betwenn WWLLN and > GCRs",side=3,col="black",line=2.5) > > > legend("topleft",col=c("red","black"),lty=1,legend=c("GCRs","WWLLN")) > > dev.off() > > I got the correct axes except that the x-axis is not what I want. I > want the date to appear on the x-axis. i actually got that by using: > axis(side=1,at=c(1,400,800,1200,1500),labels=c("2004","2005","2006","2007", > "2008")) > > But there is a little time shift, indicating that the above line may > not have been assigned correctly. > > I then fiddled with axis(side=1) to see if the correct date can > naturally appear. I could not succeed. > > I can attach the plot I generated. Instead of date appearing on the > x-axis, ordinary numbers appeared. > > I guess the best way of getting the correct date on x-axis is to allow > the system to fix the date as data points are many. But I don't know > how to do that. > > Thank you in advance for your usual kind help. > Best regards > Ogbos > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. 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