Hi All,

I am trying to lable the y-axis on my scatterplot with the following:
"Soil moisture content (m3m-3)"

I am using the following coding for plotting the graph:
plot(soilmoisture~gradientlevel, xlab="Levels of droughting gradient", ylab="Soil moisture content (m3m-3)", bty="l", font.main="2", pch=16, las=1, cex.lab="1.13")

I have tried to incorporate 'expression' into this coding for the ylab as follows (with also a few variations):
plot(soilmoisture~gradientlevel, xlab="Levels of droughting gradient", ylab=expression"Soil moisture content (m^3m^-3)", bty="l", font.main="2", pch=16, las=1, cex.lab="1.13")

...but this isn't working and the second m never seems to come up wth superscript 3 after it. I'm guessing I have tried to incorporate 'expression' too simply!

Would someone please advise me as to the coding for this?

Many thanks

Sarah

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