which.half: which.half
In tankwin08/waveformlidar: Waveform LiDAR Data Processing and Analysis

Description Usage Arguments Value Examples

The function allows you to identify the half total energy position (time location) which can be used to calculate the height from waveform ending or waveform begining.

1	which.half(x, rescale = TRUE)

`x`	is the waveform intensities. If you have other information, you should delete these intensites before you run this function.
`rescale`	is to determine whether you want to rescale the waveform intensity or not. Here we used the minimum intensity of each waveform to conduct rescaling. Default is using rescaling.

return the index of half total energy position of waveform.

data(return)
x<-return[1,]
#default
which.half(x)
#NOT USE rescale, the result will be a bit different
half_pos <- which.half(x,rescale=FALSE)
##the distnace from half position to the waveform ending is
dis_end = (wavelen(x)-half_pos)*0.15
dis_begin = half_pos*0.15 ##here 0.15 is the 1ns distance.