ramesh ramesh - 1 month ago 8
R Question

ggplot Error: Don't know how to automatically pick scale for object of type function

I plotted a stacked bar graph in R using ggplot2 package,

data<-read.table("K.txt",header=TRUE, sep="\t")
> data
Sample P1 P2 P3 P4
1 G1 0.02 0.01 0.03 0.95
2 G2 0.01 0.01 0.02 0.97
3 G3 0.01 0.01 0.02 0.97
4 G4 0.01 0.01 0.02 0.97
5 G5 0.01 0.01 0.02 0.96
6 G6 0.01 0.01 0.01 0.98
7 G7 0.05 0.01 0.01 0.93
8 G8 0.34 0.01 0.01 0.64
9 G9 0.43 0.01 0.01 0.56
> library("reshape2", lib.loc="C:/Program Files/R/R-2.15.2/library")
> data1<-melt(data)
Using Sample as id variables
> head(data1)
Sample variable value
1 G1 P1 0.02
2 G2 P1 0.01
3 G3 P1 0.01
4 G4 P1 0.01
5 G5 P1 0.01
> library("ggplot2", lib.loc="C:/Program Files/R/R-2.15.2/library")
ggplot(data=data1, aes(x=sample, y=value, fill=variable))+geom_bar(width=1)+scale_y_continuous(expand = c(0,0))+ opts(axis.text.x=theme_text(angle=90))
Don't know how to automatically pick scale for object of type function. Defaulting to continuous
Error in data.frame(x = function (x, size, replace = FALSE, prob = NULL) :
arguments imply differing number of rows: 0, 36


Can any1 help me to sort out this error?

Many thanks
Ramesh

Answer

Change sample (built-in function) to Sample (your variable)

ggplot(data=data1, aes(x=Sample, y=value, fill=variable))+geom_bar(width=1)+scale_y_continuous(expand = c(0,0))+ opts(axis.text.x=theme_text(angle=90))
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