// A function to print arrays for a selected pixel in the following examples.functionsampArrImg(arrImg){varpoint=ee.Geometry.Point([-121,42]);returnarrImg.sample(point,500).first().get('array');}// Create a 1D array image with length 12.vararrayImg1D=ee.Image([0,10,6,5,4,7,11,1,2,9,8,3]).toArray();print('1D array image (pixel)',sampArrImg(arrayImg1D));// [0, 10, 6, 5, 4, 7, 11, 1, 2, 9, 8, 3]// Sort the 1D array in ascending order.vararrayImg1DSorted=arrayImg1D.arraySort();print('1D array image sorted (pixel)',sampArrImg(arrayImg1DSorted));// [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]// You can use another array image to control sorting. The order of values// in the optional keys array translates to relative position in the input// array. For example, here is a keys array image with non-sequential values in// descending order, it will reverse the order of the input array; make the// last position first and the first position last.varkeys1D=ee.Image([99,98,50,45,23,18,9,8,7,5,2,0]).toArray();print('1D array image keys (pixel)',sampArrImg(keys1D));// [99, 98, 50, 45, 23, 18, 9, 8, 7, 5, 2, 0]vararrayImg1DSortedKeys=arrayImg1D.arraySort(keys1D);print('1D array image sorted by keys (pixel)',sampArrImg(arrayImg1DSortedKeys));// [3, 8, 9, 2, 1, 11, 7, 4, 5, 6, 10, 0]// To sort a 2D array, the keys array image is required.// Create a 2D array image with 3 rows and 4 columns.vararrayImg2D=arrayImg1D.arrayReshape(ee.Image([3,4]).toArray(),2);print('2D array image (pixel)',sampArrImg(arrayImg2D));// [[0, 10,  6, 5],//  [4,  7, 11, 1],//  [2,  9,  8, 3]]// Only a single axis can be sorted at a time. Here, we reverse sort along rows.// There are 4 elements in each row, so we construct an 1x4 array image.varkeys2Drows=ee.Image([3,2,1,0]).toArray().toArray(1).arrayTranspose();print('2D array image row keys (pixel)',sampArrImg(keys2Drows));// [[3, 2, 1, 0]]vararrayImg2DSortedRows=arrayImg2D.arraySort(keys2Drows);print('2D array image sorted rows (pixel)',sampArrImg(arrayImg2DSortedRows));// [[5,  6, 10, 0],//  [1, 11,  7, 4],//  [3,  8,  9, 2]]// Reverse sort along columns, create a 3x1 keys array image with values in// descending order.varkeys2Dcols=ee.Image([2,1,0]).toArray().toArray(1);print('2D array image column keys (pixel)',sampArrImg(keys2Dcols));// [[2],//  [1],//  [0]]vararrayImg2DSortedCols=arrayImg2D.arraySort(keys2Dcols);print('2D array image sorted cols (pixel)',sampArrImg(arrayImg2DSortedCols));// [[2,  9,  8, 3],//  [4,  7, 11, 1],//  [0, 10,  6, 5]]

# A function to print arrays for a selected pixel in the following examples.defsamp_arr_img(arr_img):point=ee.Geometry.Point([-121,42])returnarr_img.sample(point,500).first().get('array')# Create a 1D array image with length 12.array_img_1d=ee.Image([0,10,6,5,4,7,11,1,2,9,8,3]).toArray()display('1D array image (pixel):',samp_arr_img(array_img_1d))# [0, 10, 6, 5, 4, 7, 11, 1, 2, 9, 8, 3]# Sort the 1D array in ascending order.array_img_1d_sorted=array_img_1d.arraySort()display('1D array image sorted (pixel):',samp_arr_img(array_img_1d_sorted))# [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]# You can use another array image to control sorting. The order of values# in the optional keys array translates to relative position in the input# array. For example, here is a keys array image with non-sequential values in# descending order, it will reverse the order of the input array; make the# last position first and the first position last.keys_1d=ee.Image([99,98,50,45,23,18,9,8,7,5,2,0]).toArray()display('1D array image keys (pixel):',samp_arr_img(keys_1d))# [99, 98, 50, 45, 23, 18, 9, 8, 7, 5, 2, 0]array_img_1d_sorted_keys=array_img_1d.arraySort(keys_1d)display('1D array image sorted by keys (pixel):',samp_arr_img(array_img_1d_sorted_keys))# [3, 8, 9, 2, 1, 11, 7, 4, 5, 6, 10, 0]# To sort a 2D array, the keys array image is required.# Create a 2D array image with 3 rows and 4 columns.array_img_2d=array_img_1d.arrayReshape(ee.Image([3,4]).toArray(),2)display('2D array image (pixel):',samp_arr_img(array_img_2d))# [[0, 10,  6, 5],#  [4,  7, 11, 1],#  [2,  9,  8, 3]]# Only a single axis can be sorted at a time. Here, we reverse sort along rows.# There are 4 elements in each row, so we construct an 1x4 array image.keys_2d_rows=ee.Image([3,2,1,0]).toArray().toArray(1).arrayTranspose()display('2D array image row keys (pixel):',samp_arr_img(keys_2d_rows))# [[3, 2, 1, 0]]array_img_2d_sorted_rows=array_img_2d.arraySort(keys_2d_rows)display('2D array image sorted rows (pixel):',samp_arr_img(array_img_2d_sorted_rows))# [[5,  6, 10, 0],#  [1, 11,  7, 4],#  [3,  8,  9, 2]]# Reverse sort along columns, create a 3x1 keys array image with values in# descending order.keys_2d_cols=ee.Image([2,1,0]).toArray().toArray(1)display('2D array image column keys (pixel):',samp_arr_img(keys_2d_cols))# [[2],#  [1],#  [0]]array_img_2d_sorted_cols=array_img_2d.arraySort(keys_2d_cols)display('2D array image sorted cols (pixel):',samp_arr_img(array_img_2d_sorted_cols))# [[2,  9,  8, 3],#  [4,  7, 11, 1],#  [0, 10,  6, 5]]