title: R Boxplot width
body: <p>I am drawing a scatter plot in R and want to add boxplots. The x-axis are dates, the y-axis weights. I want to visualize the weight over time and so for each week, there should be a boxplot. However, the width of the boxplots are too small. This is what I currently have:
  <img src="https://i.stack.imgur.com/6jSfV.png" alt="Rplot"></p>
  
  <p>The boxplots are drawn like this:</p>
  
  <pre><code>data &lt;- read.table("weight2.txt", header=TRUE)
  data$datetime &lt;- strptime(paste(data$Date, data$Time), "%d.%m.%Y %H:%M")
  data$week &lt;- strftime(data$datetime,format="%W")
  data$timestamp &lt;- as.numeric(data$datetime)
  
  plot(data$datetime, data$Weight, xlab="Date",
      ylab="Weight", ylim=c(61,68))
  
  library(plyr)
  dt &lt;- data.table(data)
  
  aggrWeek &lt;- ddply(dt,~week,summarise,
                min=min(Weight),
                firstQ=quantile(Weight,0.25),
                mean=mean(Weight),
                thirdQ=quantile(Weight,0.75),
                max=max(Weight),
                timestamp=mean(timestamp))
  aggrWeek$datetime &lt;- as.POSIXct(aggrWeek$timestamp, origin="1970-01-01")
  
  boxplotData &lt;- t(
      data.frame(aggrWeek$min, aggrWeek$firstQ, aggrWeek$mean, aggrWeek$thirdQ, aggrWeek$max))
  
  bxp(list(
    stats=data.matrix(boxplotData), n=rep(1,ncol(boxplotData))), 
      add=TRUE, at=aggrWeek$datetime, show.names=FALSE)
  </code></pre>
  
  <p><a href="http://pastebin.com/wXES2VYV" rel="nofollow noreferrer">weight2.txt</a></p>
  
  <p>What can I do to make the width of the boxplots bigger?</p>