Hi Cora,
A mucht better way of storing R-objects in files is through the use of
the save() command. The load() command is the equivalent to reload the
file. Example in code:
vmodel = vgm(10, "Exp", 300, 4.5)
save(vmodel, file = "vmodel.rda")
# reloading the file
load("vmodel.rda")
see ?save and ?load for more details.
cheers,
Paul
Cora Shea wrote:
Dear List,
In the hopes that someone may know why, I will describe an error I get from
fit.variogram when reading a variogram from a file.
When I create a gstatVariogram object in a given R session, I can use
fit.variogram upon it just fine via:
temp.vgm <- variogram(z~x.coord+y.coord, temp.frame, cressie=T)
temp.fit <- fit.variogram(temp.vgm,v.model,fit.method=1)
Then, I store that same gstatVariogram object in a file via write.table:
write.table(temp.vgm,file=file.name)
And then, when I later recall it using read.table:
temp.vgm <- read.table(file.name)
class(temp.vgm) <- "gstatVariogram"
But....then I can no longer perform the fit.variogram upon it using the
exact same v.model. I receive the error:
temp.fit <- fit.variogram(temp.vgm,v.model,fit.method=1)
Error in fit.variogram(temp.vgm, v.model, fit.method = 1) :
REAL() can only be applied to a 'numeric', not a 'integer'
I would very much like to have these variograms in files and then use them
later and on different computers, and I can unfortunately find no
information on this error.
Thank you for any help you can provide, and thank you for your time.
Cora
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Department of Physical Geography
Faculty of Geosciences
University of Utrecht
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