i am sorry again.. this is my dataset..
'data.frame': 46376 obs. of 19 variables: $ scan.no : int 24 78 61 64 64 64 65 73 79 82 ... $ track.no : int 5 48 105 122 124 121 123 380 1073 1093 ... $ blip.no : int 70 323 514 547 549 553 558 5355 7014 7119 ... $ date : chr "2011-04-29" "2011-04-29" "2011-04-29" "2011-04-29" ... $ time : chr "18:17:56" "18:20:08" "18:24:58" "18:25:05" ... $ timestamp: num 1.30e+09 1.30e+09 1.30e+09 1.30e+09 1.30e+09 ... $ range : int 1379 937 555 562 562 555 545 2708 593 2354 ... $ x : int -997 -487 -1 230 139 -1 223 -2362 163 2017 ... $ y : int -883 -763 -536 -491 -525 -536 -477 1123 -549 1049 ... $ z : int 357 243 144 145 146 144 141 701 153 609 ... $ ns : int 378 72 72 98 115 72 41 31 44 32 ... $ area : int 16579 2144 1270 1750 2061 1270 710 2668 829 2394 ... $ int : num 0.96 0.82 1 0.999 0.969 1 1 0.816 1 1 ... $ max : num 1 0.984 1 1 1 1 1 0.933 1 1 ... $ aspan : int 69 28 36 40 44 36 40 13 12 8 ... $ rspan : int 8 5 2 4 4 2 2 6 5 4 ... $ perim : int 670 613 125 288 206 125 108 445 221 211 ... $ Dir : num 1 1 1 2 1 1 2 1 2 1 ... $ bearing : num 228 213 180 155 165 ... now previously i have not mentioned these variable because i will be removing them eventually.... when i run the above code.. i am getting this error message.. plot(dat$date, dat$height, xaxt="n") > axis(1, at=new_data2$date[c(1,46376)], + labels=month.abb[ 1+as.POSIXlt(new_data2$date[c(1,46376)])$mon], + line=2, + lwd=0) Error in axis(1, at = new_data2$date[c(1, 46376)], labels = month.abb[1 + : no locations are finite In addition: Warning message: In axis(1, at = new_data2$date[c(1, 46376)], labels = month.abb[1 + : NAs introduced by coercion axis(1, at=new_data2$date, labels=as.POSIXlt(new_data2$date)$mday) Error in axis(1, at = new_data2$date, labels = as.POSIXlt(new_data2$date)$mday) : no locations are finite In addition: Warning message: In axis(1, at = new_data2$date, labels = as.POSIXlt(new_data2$date)$mday) : NAs introduced by coercion i am looking for an output same as the plot in the image below.. http://r.789695.n4.nabble.com/file/n3666468/graph.jpg y - axis is the mean passage rate ( total no. of birds /hr) i have read the posting guide as you have suggested..... thank you .. -- View this message in context: http://r.789695.n4.nabble.com/plotting-date-data-over-couple-of-months-tp3666298p3666468.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list 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.