AI-generated Key Takeaways
-
Image.arrayTransposetransposes two dimensions of each array pixel. -
The
axis1andaxis2arguments, defaulting to 0 and 1 respectively, determine which axes are swapped.
| Usage | Returns |
|---|---|
Image.
arrayTranspose
( axis1
, axis2
)
|
Image |
| Argument | Type | Details |
|---|---|---|
|
this:
input
|
Image | Input image. |
axis1
|
Integer, default: 0 | First axis to swap. |
axis2
|
Integer, default: 1 | Second axis to swap. |
Examples
Code Editor (JavaScript)
// A function to print arrays 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 2D array image. var arrayImg2D = ee . Image ([ 0 , 1 , 2 , 3 , 4 , 5 ]). toArray (). arrayReshape ( ee . Image ([ 2 , 3 ]). toArray (), 2 ); print ( '2D 2x3 array image (pixel)' , sampArrImg ( arrayImg2D )); // [[0, 1, 2], // [3, 4, 5]] // Swap 0-axis and 1-axis. Input is a 2x3 array, output will be 3x2. var transposed = arrayImg2D . arrayTranspose (); print ( 'Transposed (3x2) array image (pixel)' , sampArrImg ( transposed )); // [[0, 3], // [1, 4], // [2, 5]]
import ee import geemap.core as geemap
Colab (Python)
# A function to print arrays 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 2D array image. array_img_2d = ee . Image ([ 0 , 1 , 2 , 3 , 4 , 5 ]) . toArray () . arrayReshape ( ee . Image ([ 2 , 3 ]) . toArray (), 2 ) display ( '2D 2x3 array image (pixel):' , samp_arr_img ( array_img_2d )) # [[0, 1, 2], # [3, 4, 5]] # Swap 0-axis and 1-axis. Input is a 2x3 array, output will be 3x2. transposed = array_img_2d . arrayTranspose () display ( 'Transposed (3x2) array image (pixel):' , samp_arr_img ( transposed )) # [[0, 3], # [1, 4], # [2, 5]]
