R help - Jul 2010 - Multiple Ploting Colors

I'm trying to use multiple plotting colors in my code. My first
"ifelse" statement successfully does what I want. However, now I want
anything less than -4.5 to be green and the rest black. I want another
"col" argument but can only use one. How could I go about getting
separate colors for anything above 4.5  and less than -4.5?

plot(three, type="h", col=ifelse(three > 4.5, "red",
"black"), xlim=c(0,500), ylim=range(three), lwd=2,
     xlab="Chromosome", ylab="Z-Score", font.lab=2, font=2,
main="Upregulated Genes in Patient Sample")

Thanks in advance,

Patrick


The information transmitted is intended only for the per...{{dropped:10}}

Richardson, Patrick <Patrick.Richardson <at> vai.org> writes:
> 
> I'm trying to use multiple plotting colors in my code. My first
"ifelse"
statement successfully does what I
> want. However, now I want anything less than -4.5 to be green and the rest
black. I want another "col"
> argument but can only use one. How could I go about getting separate colors
for anything above 4.5  and less
> than -4.5?
> 
> plot(three, type="h", col=ifelse(three > 4.5, "red",
"black"), xlim=c(0,500),
ylim=range(three), lwd=2,
>      xlab="Chromosome", ylab="Z-Score", font.lab=2,
font=2, main="Upregulated
Genes in Patient Sample")
> 
> Thanks in advance,
> 
> Patrick
> 
> The information transmitted is intended only for the p...{{dropped:22}}

Hi,

On Mon, Jul 12, 2010 at 12:02 PM, Richardson, Patrick
<Patrick.Richardson at vai.org> wrote:
> I'm trying to use multiple plotting colors in my code. My first
"ifelse" statement successfully does what I want. However, now I want
anything less than -4.5 to be green and the rest black. I want another
"col" argument but can only use one. How could I go about getting
separate colors for anything above 4.5 ?and less than -4.5?
>
> plot(three, type="h", col=ifelse(three > 4.5, "red",
"black"), xlim=c(0,500), ylim=range(three), lwd=2,
> ? ? xlab="Chromosome", ylab="Z-Score", font.lab=2,
font=2, main="Upregulated Genes in Patient Sample")
How about:

my.colors <- ifelse(three > 4.5, "red", "black")
my.colors[three < -4.5] <- 'green'

plot(three, type='h', col=my.colors, ...)

-- 
Steve Lianoglou
Graduate Student: Computational Systems Biology
?| Memorial Sloan-Kettering Cancer Center
?| Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact

Richardson, Patrick <Patrick.Richardson <at> vai.org> writes:
> 
> I'm trying to use multiple plotting colors in my code. My first
"ifelse"
statement successfully does what I
> want. However, now I want anything less than -4.5 to be green and the rest
black. I want another "col"
> argument but can only use one. How could I go about getting separate colors
for anything above 4.5  and less
> than -4.5?
> 
> plot(three, type="h", col=ifelse(three > 4.5, "red",
"black"), xlim=c(0,500),
ylim=range(three), lwd=2,
>      xlab="Chromosome", ylab="Z-Score", font.lab=2,
font=2, main="Upregulated
Genes in Patient Sample")
> 
> Thanks in advance,
> 
> Patrick
> 
> The information transmitted is intended only for the p...{{dropped:19}}