Error Object Concentration not found

Question

abc<- Plot_timevsconc[(Plot_timevsconc$Participant%in%c("905")),]##select the panelist
pdf("Final1.pdf", width = 25, height = 10)
for(ms in names(abc[,-c(1:6)]))
{
  abc <- data.frame(Concentration = abc[,ms], Time = abc$Time, Type = abc$Sample)
  hello <- ggplot(data = abc, aes(x = Time, y = Concentration, color = Type)) + geom_line(size=1)+
  scale_x_continuous(breaks=seq(0,520, by=40)) + labs(x = "Time(seconds)") + labs(y="Concentration(ppbv)") +
  ggtitle(paste(ms))
print(hello)
}
dev.off()

This is my code. It keeps saying the object "concentration" not found.

Could anyone please tell me what could have possibly gone wrong?

Thank you

Answer 1

Hi Sanju, is the abc data frame created in the below line before using ggplot?

for(ms in names(abc[,-c(1:6)])) 
{ 
  abc <- data.frame(Concentration = abc[,ms], Time = abc$Time, Type = abc$Sample) 
  hello <- ggplot(data = abc, aes(x = Time, y = Concentration, color = Type)) + geom_line(size=1)+ 
}

Convert Concentration = abc[,ms] to Concentration = abc$ms and try.

Comments

Otherwise, replace Concentration = abc[,ms] with Concentration = abc[,[ms col_no]]