| इस्तेमाल | रिटर्न |
|---|---|
Image.arrayAccum(axis, reducer) | इमेज |
| आर्ग्यूमेंट | टाइप | विवरण |
|---|---|---|
यह: input | इमेज | इनपुट इमेज. |
axis | पूर्णांक | वह ऐक्सिस जिसके हिसाब से, वैल्यू का क्रमवार योग निकालना है. |
reducer | Reducer, default: null | वैल्यू इकट्ठा करने के लिए रिड्यूसर. डिफ़ॉल्ट रूप से SUM फ़ंक्शन का इस्तेमाल किया जाता है, ताकि दिए गए ऐक्सिस के हिसाब से हर वेक्टर का कुल योग निकाला जा सके. |
उदाहरण
कोड एडिटर (JavaScript)
// A function to print the array for a selected pixel in the following examples. function sampArrImg(arrImg) { var point = ee.Geometry.Point([-121, 42]); return arrImg.sample(point, 500).first().get('array'); } // Create a 1D array image. var arrayImg1D = ee.Image([1, 2, 3]).toArray(); print('1D array image (pixel)', sampArrImg(arrayImg1D)); // [1, 2, 3] // Perform accumulation procedures along axes using ee.Reducer functions. // Here we calculate the cumulative sum along the 0-axis for a 1D array. var accumSum1DAx0 = arrayImg1D.arrayAccum(0, ee.Reducer.sum()); print('Cumulative sum along 0-axis', sampArrImg(accumSum1DAx0)); // [1, 3, 6] // Create a 2D 3x3 array image. var arrayImg2D = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray() .arrayReshape(ee.Image([3, 3]).toArray(), 2); print('2D 3x3 array image (pixel)', sampArrImg(arrayImg2D)); // [[1, 2, 3], // [4, 5, 6], // [7, 8, 9]] // Calculate the cumulative sum along the 0-axis for a 2D array. var accumSum2DAx0 = arrayImg2D.arrayAccum(0, ee.Reducer.sum()); print('Cumulative sum along 0-axis', sampArrImg(accumSum2DAx0)); // [[ 1, 2, 3], // [ 5, 7, 9], // [12, 15, 18]] // Calculate the cumulative sum along the 1-axis for a 2D array. var accumSum2DAx1 = arrayImg2D.arrayAccum(1, ee.Reducer.sum()); print('Cumulative sum along 1-axis', sampArrImg(accumSum2DAx1)); // [[1, 3, 6], // [4, 9, 15], // [7, 15, 24]]
import ee import geemap.core as geemap
Colab (Python)
# A function to print the array for a selected pixel in the following examples. def samp_arr_img(arr_img): point = ee.Geometry.Point([-121, 42]) return arr_img.sample(point, 500).first().get('array') # Create a 1D array image. array_img_1d = ee.Image([1, 2, 3]).toArray() print('1D array image (pixel):', samp_arr_img(array_img_1d).getInfo()) # [1, 2, 3] # Perform accumulation procedures along axes using ee.Reducer functions. # Here we calculate the cumulative sum along the 0-axis for a 1D array. accum_sum_1d_ax0 = array_img_1d.arrayAccum(0, ee.Reducer.sum()) print('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_1d_ax0).getInfo()) # [1, 3, 6] # Create a 2D 3x3 array image. array_img_2d = ee.Image([1, 2, 3, 4, 5, 6, 7, 8, 9]).toArray().arrayReshape( ee.Image([3, 3]).toArray(), 2) print('2D 3x3 array image (pixel):', samp_arr_img(array_img_2d).getInfo()) # [[1, 2, 3], # [4, 5, 6], # [7, 8, 9]] # Calculate the cumulative sum along the 0-axis for a 2D array. accum_sum_2d_ax0 = array_img_2d.arrayAccum(0, ee.Reducer.sum()) print('Cumulative sum along 0-axis:', samp_arr_img(accum_sum_2d_ax0).getInfo()) # [[ 1, 2, 3], # [ 5, 7, 9], # [12, 15, 18]] # Calculate the cumulative sum along the 1-axis for a 2D array. accum_sum_2d_ax1 = array_img_2d.arrayAccum(1, ee.Reducer.sum()) print('Cumulative sum along 1-axis:', samp_arr_img(accum_sum_2d_ax1).getInfo()) # [[1, 3, 6], # [4, 9, 15], # [7, 15, 24]]