I have edited twilight events from Migrate Tech tags using preprocessLight in TwGeos. I have then converted to TAGS format using the function BAStag2TAGS. I have been able to follow the workflow for GeoLight up until the function mergeSites, after this step I get the following error:
"Error in solve.default(fit$hessian) : Lapack routine dgesv: system is exactly singular: U[1,1] = 0."
My code up until this point looks like this:
# so we have to extract twilights tw<-TAGS.twilights[TAGS.twilights$twilight>0 & TAGS.twilights$excluded==0 & TAGS.twilights$datetime<as.POSIXct("2017-06-12", tz="UTC"),]
# make pairs tw$datetime[tw$twilight==2]<-tw$datetime[tw$twilight==2]
Error in GeoLight after using mergeSites function
in Geolocator Discussion & Support
Posted
Hi all,
I have edited twilight events from Migrate Tech tags using preprocessLight in TwGeos. I have then converted to TAGS format using the function BAStag2TAGS. I have been able to follow the workflow for GeoLight up until the function mergeSites, after this step I get the following error:
"Error in solve.default(fit$hessian) :
Lapack routine dgesv: system is exactly singular: U[1,1] = 0."
My code up until this point looks like this:
# so we have to extract twilights
tw<-TAGS.twilights[TAGS.twilights$twilight>0 & TAGS.twilights$excluded==0
& TAGS.twilights$datetime<as.POSIXct("2017-06-12", tz="UTC"),]
tw$datetime[tw$twilight==2]<-tw$datetime[tw$twilight==2]
tSecond=tw$datetime[which(diff(tw$datetime)<20)+1],
type=tw$twilight[which(diff(tw$datetime)<20)])
TAGS.twilights$datetime<-as.POSIXct(TAGS.twilights$datetime,
tz="UTC", format="%Y-%m-%dT%T")
cL <- changeLight(gl_twl, quantile = 0.95, days = 5)
mS <- mergeSites(gl_twl, site = cL$site, degElevation = elev, distThreshold = 400)
If anyone has encountered this error before and can shed light on what I am doing wrong, it would be much appreciated.
Thanks,
Leah