How to plot a matrix with 18 rows by row vs. a vector in a single graph, resulting 18 lines with different colors?

See ?matplot.  E.g.,

matplot(time, t(gene), type="b", lty=1)

Andy
From: Xiao Shi

I have a matrix gene=array(rnorm(180), dim=c(18,10)) and a 
vector time=c(0,
0.5,2,4,6,8,12,24,48,72).
So i can get a plot with 
plot(time,gene[1,],type="b",col="green") for the 
first row.So how can i get all the 18 rows in the same plot 
VS. the same 
vector time=c(0,0.5,2,4,6,8,12,24,48,72).
Any suggestions.Thanks !

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