IDL 二維數組元素，通過順序索引，獲取行列索引

IDL> array=[[11,22,33],[44,55,66],[77,88,99],[33,33,33]]

IDL> print, array

      11      22      33

      44      55      66

      77      88      99

      33      33      33

IDL> index = where(array eq 33)

IDL> result = ARRAY_INDICES(array, index)

IDL> print,result

           2           0

           0           3

           1           3

           2           3

 

result為一個二維數組，第一個列為array的列索引，第二列為array的行索引

array[2,0] = 33

array[0,3] = 33

array[1,3] = 33

array[2,3] = 33