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POplotting times with ggplot: added hour in plot maybe due to daylight saving?
 

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  1. POplotting times with ggplot: added hour in plot maybe due to daylight saving?
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    <p>Forgive me if this is already answered, but I cannot find the question in the archives.</p> <p>I am trying to plot some data with times on x axis. The problem is that it plots the times with an extra hour added. E.g. 7pm becomes 8pm in the plot. I think this might be due to the fact that the dates are in daylight saving time period (april-october). When I change the dates to for example November, ggplot2 plots it fine. How can I fix this? As the time in the dataframe is the correct time (no need for +1 hour). I know I can just create a new column where it is time -1 hour but it seems that ggplot2 should just plot it at the right time from the start.</p> <p>Thanks!</p> <p>the code with some random data:</p> <pre><code>library(lubridate) library(ggplot2) ee = read.table(textConnection('Timestamp Temp.Diff "5/14/2011 19:00" -0.385 "5/14/2011 19:10" -0.535 "5/14/2011 19:20" -0.484 "5/14/2011 19:30" -0.409 "5/14/2011 19:40" -0.385 "5/14/2011 19:50" -0.215'), header=TRUE) ee$Timestamp &lt;- mdy_hm(ee$Timestamp) ggplot(data=ee, aes(x=Timestamp, y=Temp.Diff)) + geom_point() </code></pre> <p><img src="https://i.imgur.com/sBOIX.png" alt="plot showing added hour"></p>
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    1. USMieke Zwart
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    1. COWeird, your code works fine for me - i.e. plots hours as it should after parsing. Maybe check your packages versions?
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      1. POplotting times with ggplot: added hour in plot maybe due to daylight saving?
      1. USGeek On Acid
    2. CODitto above on R version 2.15.1, ggplot2_0.9.2.1
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      1. POplotting times with ggplot: added hour in plot maybe due to daylight saving?
      1. USmetasequoia
    3. COHave you tried fiddling with arguments `tz` of function `mdy_hm`? It defaults to UTC timezone.
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      1. POplotting times with ggplot: added hour in plot maybe due to daylight saving?
      1. USplannapus
 

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