plotting with ggplot2. Error

Question

I am trying to plot the data using the ggplot2 package, but I am crossing with an error: the data are set of columns which represents every day values (the values change in altitude)

V1 V2.... V500
2E-15.....3E-14
3e-14.....3E-21
1.3E-15....NA

I want to plot all the data in two axis with a fill of the values.

Code;

a<-data.frame("/../vertical_value.csv",sep=",",header=F)
am<-melt(t(a))
dataset<-expand.grid(X = 1:500, H = seq(1,25,by=1))
dataset$axp<-am$value
g<-ggplot(dataset, aes(x = X, y = H, fill = axp)) + geom_tile()

error:

Error: Casting formula contains variables not found in molten data: XHaxp

Brandon Bertelsen · Accepted Answer · 2010-11-19 20:22:40Z

1

Looking at this again, I think that you should be able to bypass this just by dropping NA rows after you melt.

a<-data.frame("/../vertical_value.csv",sep=",",header=F)
am<-melt(t(a))
am <- na.omit(am) ## ADD THIS LINE
dataset<-expand.grid(X = 1:500, H = seq(1,25,by=1))
dataset$axp<-am$value
g<-ggplot(dataset, aes(x = X, y = H, fill = axp)) + geom_tile()

answered Nov 19, 2010 at 20:22

Brandon Bertelsen

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