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thank you for responses

Stefan my problem is with R code

thank you for pointing me in the right direction

hello Stephan

thank you. my procedure in original post is part of chunk in R. I am failing to get the text label of the abline to appear in the final output. See below:

<<r131, echo=FALSE, fig=TRUE, width=10, height=13, results=hide>>=
par(mfrow = c(3, 1))

# First plot - Series 1 (SO2-10min ...

I have the following procedure. I see the abline text when processing chunk. However when compiling pdf the text does not appear. Anyone knows what is causing this?

abline(h="191", col="red")
text(11000, 200, pos = 4, "hello", col = 1, cex = 0.9)