[R] How to write a Greek letter in a graph?

[Uwe Ligges]

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Jeremy Baxter wrote:
> Catherine
> 
> Have a look at the help in text(), i.e. 
> 
> help(text)


... and particularly

   help("plotmath")


Uwe Ligges


> I think you are looking for something along the lines of:
> 
> xyplot(power1+power2 ~ pi0, data=resultb, ylab="Average Power", type="l", 
> pch=LETTERS[1:2], lty=c(1:2), main="(a)", xlab=expression(pi[0])) 
> 
> i.e. i am assuming you want pi subscript zero. An example of using text would 
> be
> 
> text(6,10,expression( y==1.5*x+10))
> 
> 
> HTH,
> Jeremy
> 
> On Friday 18 January 2008 10:16:22 pm cathelf wrote:
>> Hi,
>> Sorry for bothering you again. I have a small question about the graph and
>> the following is my code:
>>
>> xyplot(power1+power2 ~ pi0, data=resultb, ylab="Average
>> Power", type="l", pch=LETTERS[1:2], lty=c(1:2), main="(a)")
>>
>> The name of the X-axis will be “pi0” in the graph.
>>
>>
>> What should I do if I want the name of the X-axis is the
>> Greek letter of “pi0”?
>>
>>
>> Thanks a lot!
>> Catherine
>