na.omit
Handle Missing Values in Objects
These methods are useful for dealing with NAs in e.g., source_spct,
response_spct, filter_spct and reflector_spct.
Usage
# S3 method for generic_spct
na.omit(object, na.action = "omit", fill = NULL, target.colnames, ...)# S3 method for source_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for response_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for filter_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for reflector_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for object_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for cps_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for raw_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for chroma_spct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for generic_mspct
na.omit(object, na.action = "omit", fill = NULL, ...)
# S3 method for generic_spct
na.exclude(object, na.action = "exclude", fill = NULL, target.colnames, ...)
# S3 method for source_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for response_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for filter_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for reflector_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for object_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for cps_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for raw_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for chroma_spct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
# S3 method for generic_mspct
na.exclude(object, na.action = "exclude", fill = NULL, ...)
Arguments
- object
an R object
- na.action
character One of "omit", "exclude" or "replace".
- fill
numeric Value used to replace NAs unless NULL, in which case interpolation is attempted.
- target.colnames
character Vector of names for the target columns to operate upon, if present in
object.- ...
further arguments other special methods could require
Details
If na.omit removes cases, the row numbers of the cases form
the "na.action" attribute of the result, of class "omit".
na.exclude differs from na.omit only in the class of the
"na.action" attribute of the result, which is "exclude".
Note
na.fail and na.pass do not require a specialisation
for spectral objects. R's definitions work as expected with no need to
override them. We do not define a method na.replace, just pass
"replace" as argument. The current implementation replaces by
interpolation only individual NAs which are flanked on both sides by
valid data. Runs of multiple NAs con only replaced by a constant value
passed through parameter fill.
See Also
Examples
# NOT RUN {
my_sun.spct <- sun.spct
my_sun.spct[3, "s.e.irrad"] <- NA
my_sun.spct[5, "s.q.irrad"] <- NA
head(my_sun.spct)
# rows omitted
zo <- na.omit(my_sun.spct)
head(zo)
na.action(zo)
# rows excluded
ze <- na.exclude(my_sun.spct)
head(ze)
na.action(ze)
# data in both rows replaced
zr <- na.omit(my_sun.spct, na.action = "replace")
head(zr)
na.action(zr)
# }