On Mar 20, 2009, at 3:55 PM, Altaweel, Mark R. wrote:
I have a problem where I have two columns of data that I can simply
plot using:
plot(wV[0:15,3],wY[0:15,3]).
Perhaps:
plot(wV[0:15,3],wY[0:15,3], col = ifelse(wY[0:15,3]>0, "blue","red") )
This produces my desired plot.
Now, say I have a third variable that I would like to introduce and
use that variable to set different colors in the plot
In this case, say I wanted values greater than 0 to be "blue" and
values less than 0 to be "red"
And if they are zero? In my example those become red. Basically you
create a vector that is as long as the y-values with values of "red"
or "blue" that depend on your criterion.
Basically, my question is how can one plot something like the
function shown above, but with the added functionality of indicating
color for a third variable
Something to the effect:
if(weightComply[0:15,3]>0) //if the values from 0 to 15 in column 3
are greater than 0
plot(wV[0:15,3],wY[0:15,3],col="blue") //then plot the dots as blue
else
plot(wV[0:15,3],wY[0:15,3],col="red") //otherwise plot the dots red
I know this syntax is wrong, but I think it shows what I generally
want to do.
Mark
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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