[R] scatterplot3d - help assign colors based on multiple conditions

[Karthik Kota]

Thanks! That did the trick. 


On Jun 10, 2011, at 3:16 AM, Jim Lemon wrote:

> On 06/10/2011 06:40 AM, Karthik Kota wrote:
>> Thanks a lot! This is very helpful.
>> 
>> If I have to extend this to one more condition say assign "blue" if both the corresponding labels have "_Tongue_dorsum", is there a straight forward function. Doing something like below is overriding the colors assigned by the first statement.
>> 
>> col<- ifelse(grepl("_Anterior_nares", xlabels)&  grepl("_Anterior_nares", ylabels), "red", "black")
>> col<- ifelse(grepl("_Tongue_dorsum", xlabels)&  grepl("_Tongue_dorsum", ylabels), "blue", "black")
>> 
> Hi Karthik,
> Your problem is that you are assigning all of the values to "col" twice. If you reverse the order of the statements you will get the red/black color set. Try this:
> 
> col<-rep("black",dim(cdh1)[1])
> col[grepl("_Anterior_nares", xlabels) &
> grepl("_Anterior_nares", ylabels)]<-"red"
> col[grepl("_Tongue_dorsum", xlabels) &
> grepl("_Tongue_dorsum", ylabels)]<-"blue"
> 
> If your two conditions specify disjunct sets, that is, no case satisfies both conditions, you should have the correct vector of colors.
> 
> Jim