plot(x,y, xlab="",
mtext(side=1, line=4, expression(paste("c"[HIO[3]], bgroup("[",over("mol","m"^3), "]")))),
ylab=expression(paste("V", bgroup("[", "s"^-1, "]"))),
main="wyrkes zalez", col="black", pch=16,
cex.lab=1,
cex.axis=0.7
)

Now I have something like this. I figured out how to move xaxis label but i don't know how to move yaxis label closer to axis. I've tried mtext() but R says:""Error in mtext(side = 2, line = 1, expression(paste("V", bgroup("[", "s"^-1, :
plot.new has not been called yet"
What can I do to move X and Y axis at one time?