Number_lidar_points_into_canopy_function: Number of LIDAR points into the canopy.

Description Usage Arguments Author(s) Examples

View source: R/Number_lidar_points_into_canopy_function.R

Description

This function describe the number of points measured with LIDAR scan into the canopy.

Usage

1
Number_lidar_points_into_canopy_function(data_3D, distance_left, distance_right, min_canopy, max_canopy)

Arguments

data_3D

data_3D is the output from Extract_plant_grapevine_function.

distance_left

the left distance of the plant, generally here we can write the half of the distance between plants, but is better the real distance from the center of the plant. Measured in meters.

distance_right

the right distance of the plant, generally here we can write the half of the distance between plants, but is better the real distance from the center of the plant. Measured in meters.

min_canopy

the minimum height of the canopy.

max_canopy

the maximum height of the canopy.

Author(s)

Monica Fernanda Rinaldi

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
## Should be DIRECTLY executable !! ----
## For example:
   data (LIDAR_data)
   x <- LIDAR_data[,1]
   y <- LIDAR_data[,2]
   z <- LIDAR_data[,3]
   zdistance <- 190 # total LIDAR scan distance measured in cm.
   miny <- 0 # minimum height of the plant measured in cm.
   maxy <- 2000 # maximum height of the plant measured in cm.
   minx <- 450 # minimum width from where LIDAR starts to measure (cm).
   maxx <- 1470# maximum width from where LIDAR starts to measure (cm).
   minz <- 0 # the beginning of the LIDAR scan measured in cm.
   maxz <- 186 # the end of the LIDAR scan measured in cm (length of interest).
   out <- Extract_plant_grapevine_function(x,y,z,zdistance,miny,maxy,minx,maxx,minz,maxz)
   z_min <- 1.1 
   z_max <- 1.13
   y_min <- 0.4
   y_max <- 0.5
   distance_left <- -0.6
   distance_right <- 0.51
   data_3D <- Extract_plant_3D_function(out,z_min,z_max,y_min,y_max,distance_left,distance_right)
   min_canopy <- 0.4
   max_canopy <- 2

## The function is currently defined as
Number_LIDAR_points_into_canopy_function <- function (data_3D,distance_left,distance_right,min_canopy,max_canopy){
  x_plant <- y_plant <- z_plant <- NULL
  canopy <- subset(data_3D, data_3D$z_plant >= distance_left & data_3D$z_plant <= distance_right & data_3D$y_plant >= min_canopy & data_3D$y_plant <= max_canopy,select=c(x_plant,y_plant,z_plant))
  N_points <- length(canopy[,1])
  return (N_points)
  }
  Number_LIDAR_points_into_canopy_function(data_3D,distance_left,distance_right,min_canopy,max_canopy)

PROTOLIDAR documentation built on May 29, 2017, 7:12 p.m.