Error "Object Concentration not found"

0 votes
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
Oct 18, 2019 in Data Analytics by Sanju Vigasini
• 120 points
79 views

1 answer to this question.

0 votes

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.

answered Oct 18, 2019 by Cherukuri
• 32,460 points

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

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