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POggplot does not plot data in the given order
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  1. POggplot does not plot data in the given order
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    copied!<p>I'm trying to plot some date points:</p> <pre><code>library(ggplot2) library(plyr) set.seed(1234) df &lt;- data.frame( c1 = as.character(1:10), c2 = sample(seq(from=as.Date("2012-01-01"),to=as.Date("2012-12-01"),by="day"), 10) ) df &lt;- arrange(df,c2) qplot(c2,c1,data=df) + scale_x_date(breaks="1 month") </code></pre> <p>Although I used <em>arrange</em> to sort the data, ggplot does not plot the data in order: <img src="https://i.stack.imgur.com/Egcgz.png" alt="enter image description here"></p> <p>The expected plot is:</p> <p><img src="https://i.stack.imgur.com/iQvKQ.png" alt="enter image description here"></p> <p>How do I tell ggplot to plot the c1 column in the given order rather than the natural sort order for the "character" type ?</p> <p>SessionInfo():</p> <pre><code>R version 2.14.1 (2011-12-22) Platform: x86_64-pc-linux-gnu (64-bit) locale: [1] LC_CTYPE=fr_FR.UTF-8 LC_NUMERIC=C LC_TIME=fr_FR.UTF-8 LC_COLLATE=fr_FR.UTF-8 [5] LC_MONETARY=fr_FR.UTF-8 LC_MESSAGES=fr_FR.UTF-8 LC_PAPER=C LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C LC_MEASUREMENT=fr_FR.UTF-8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] plyr_1.7.1 ggplot2_0.9.2.1 loaded via a namespace (and not attached): [1] colorspace_1.2-0 dichromat_1.2-4 digest_0.5.2 grid_2.14.1 gtable_0.1.1 labeling_0.1 [7] MASS_7.3-16 memoise_0.1 munsell_0.4 proto_0.3-9.2 RColorBrewer_1.0-5 reshape2_1.2.1 [13] scales_0.2.2 stringr_0.6.1 tools_2.14.1 </code></pre> <p>dput(df):</p> <pre><code>structure(list(c1 = structure(c(8L, 1L, 9L, 2L, 4L, 5L, 3L, 7L, 10L, 6L), .Label = c("1", "10", "2", "3", "4", "5", "6", "7", "8", "9"), class = "factor"), c2 = structure(c(15343, 15378, 15416, 15508, 15543, 15547, 15548, 15551, 15558, 15625), class = "Date")), .Names = c("c1", "c2"), row.names = c(NA, -10L), class = "data.frame") </code></pre>
 

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