Hi
I'm trying to use ggplot2 to chart a dataset that I've drawn in from
excel. When I run the qplot command, I get the following error
message:
Error: ggplot2 doesn't know how to deal with data of class character
It feels like I need to coerce one of the fields in my data frame.
Here's the code, which is short:
#draw data in from network location
setwd("S:\\790\\Actuarial\\KFC\\609 Kernel\\Sensitivity
Tests\\Stressed ESG inputs")
input<-read.csv("yieldcurve plus 1pct abs.csv",header=FALSE)
#label columns
colnames(input)<-c("scenID","yrs_ahead",0.5,1.0,2.0,3.0,4.0,5.0,6.0,7.0,8.0,9.0,10.0,11.0,12.0)
#create a data frame that i hope! will work with ggplot..
flat_data<-data.frame(cbind(input[1:2],stack(input[3:15])))
colnames(flat_data)<-c("scenID","yrs_ahead","yield","time")
#plot
library(ggplot2)
qplot(time,yield,data="flat_data",facets = yrs_ahead~.)
now the error.
In terms of the data format, head(flat data) returns the following:
> head(flat_data)
scenID yrs_ahead yield time
1 1 0 0.01637218 0.5
2 1 1 0.02446376 0.5
3 1 2 0.04501267 0.5
4 1 3 0.06947724 0.5
5 1 4 0.08262982 0.5
6 1 5 0.09761927 0.5
1) Am I right that it's about coercion of variable type?
2) Any ideas how to proceed?
Many thanks,
Dave
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