Hi,
To answer Elizabeth's question: there is no function that does what
you asked for in your first message. Liam's solution is certainly the
best solution for the moment. I'll have a look at it later. The code
checkValidPhylo() needs to be dusted off a bit: the diagnostic "
MODERATE: some nodes are of degree 1 or less" is no more useful since
nodes of degree 1 are now supported in ape.
Best,
Emmanuel
Tue, 5 Nov 2019 14:45:58 -0800 Elizabeth Purdom
<epur...@stat.berkeley.edu>:
Thank you very much, I’ll try that!
On Nov 5, 2019, at 2:20 PM, Liam Revell <liam.rev...@umb.edu> wrote:
Hi Elizabeth.
This does not do exactly what you want, but it is possible to use
capture.output() to grab the printout of checkValidPhylo() and then
grep() to see if it contains instances of "MODERATE" or "FATAL"
errors.
The following simple function does that. It returns 0 if neither
MODERATE nor FATAL errors are detected in the "phylo" object, 1 if
at
least one MODERATE error (but no FATAL errors) is detected, and 2 if
any
FATAL errors are detected:
chk.phylo<-function(x){
object<-capture.output(checkValidPhylo(x))
if(length(grep("FATAL",object))>0) return(2)
else if(length(grep("MODERATE",object))>0) return(1)
else return(0)
}
E.g.:
library(ape)
t1<-rtree(n=10)
chk.phylo(t1) ## should return 0
t2<-t1
t2$Nnode<-9.5
chk.phylo(t2) ## should return 1
t3<-t1
t3$edge<-t3$edge[-4,]
chk.phylo(t3) ## should return 2
All the best, Liam
Liam J. Revell
Associate Professor, University of Massachusetts Boston
Profesor Asistente, Universidad Católica de la Ssma Concepción
web: http://faculty.umb.edu/liam.revell/, http://www.phytools.org
Academic Director UMass Boston Chile Abroad (starting 2019):
https://www.umb.edu/academics/caps/international/biology_chile
On 11/5/2019 5:54 PM, Elizabeth Purdom wrote:
[EXTERNAL SENDER]
Hello,
I am working with the phylo object from the ape package in my own
package in which I am manipulating the trees. I would like to check
that I have successfully created a valid ape object, but the
`checkValidPhylo` function appears to be solely interactive — it
prints out a display, and always returns NULL.
Is there a function in the ape package (or can there be?) that would
do the checks, but return the results in a way that I can then
process in my function? (e.g. return a vector of each of the checks
as TRUE/FALSE) And I don’t want anything printed out, since I don’t
want that output to be printed for users of my function).
I see the package `paleotree` has ported some of those checks into a
test, so I’m guessing such a function doesn’t exist in ape — and I
don’t really want a dependency on another package just for these
checks.
Thanks,
Elizabeth Purdom
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