[R] y axis in a stacked bar plot

[Jeff Newmiller]

I don't understand what you expect. Stacked bar charts add the values together. Perhaps that is not really how you want to represent these data?
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Sent from my phone. Please excuse my brevity.

On March 25, 2015 9:29:40 PM PDT, Michelle Simon <M.Simon at har.mrc.ac.uk> wrote:
>Hello,
>Below is some simple R code I have used to create a stacked bar chart. 
>However the y-axis tick marks do not reflect the data.  The minimum and
>maximum data values I have are 3073351 and 25329814 respectively but
>the graph has data from 0 and the maximum is different  The data file
>is too large so there is a small sample below.  What am I doing wrong? 
>Please help as I cannot be sure the data is represented correctly in
>the graph (attached).
>
>fn <-"~/Documents/chr7Data.txt"
>x<-read.table(fn,check.names = TRUE, header=T)
>d <- data.frame(x)
>theChart<-ggplot(d, aes(x=factor(Congenic),y=Position, fill=Strain,
>theme_rect="white")) + geom_bar(stat='identity', position = "stack" ) +
>scale_fill_manual(values=c("deepskyblue1", "red2", "green3",
>"steelblue4", "lightblue4", "gray70")) + ylab(c("Position"))+
>ggtitle("Strain specific SNP distribution in the congenics") +
>
>#coord_cartesian(ylim = c(min(d$Position), max(d$Position))) +
>#scale_y_continuous(breaks=seq(0, 200000000, 50000000)) +
>theme_bw()+
>theme(plot.title = element_text(size=23),
>           axis.text.x = element_text(size=13, angle=90),    #20 before
>                axis.text.y = element_text(size=13),
>                panel.border = element_rect(colour="BLACK",size=0.5),
>                axis.title.x = element_text(size=12),
>                axis.title.y = element_text(size=12,angle = 90),
>                panel.background = element_rect(fill="transparent"),
>                legend.text=element_text(size=13),
>                legend.title=element_text(size=12)
>      #plot.background = element_rect(fill = "transparent",colour = NA)
>)
>png("~/Documents/sendToRGrp.png",950,750)
>print(theChart)
>dev.off()
>
>——————————— Sample Data —————————————
>Congenic Position Strain
>4201 3073351 hets
>4203 3073351 reference
>4215 3073351 reference
>4333 3073351 cba
>4335 3073351 cba
>4484 3073351 cba
>4485 3073351 reference
>4496 3073351 hets
>4497 3073351 reference
>//lots of data//
>4201 25329814 reference
>4203 25329814 reference
>4215 25329814 cba
>4333 25329814 balbc
>4335 25329814 balbc
>4484 25329814 reference
>4485 25329814 reference
>4496 25329814 balbc
>4497 25329814 hets
>
>Many thanks,
>Michy
>
>
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