Returns a new libs_spectrum with channels whose wavelengths fall in the
supplied numeric vector's range.
Usage
# S3 method for class 'libs_spectrum'
x[i]
Arguments
- x
A libs_spectrum object.
- i
Numeric vector. Wavelengths are kept if they fall in
[min(i), max(i)]. Can also be a logical or integer index into channels.
Value
A new libs_spectrum object.
