1.下标方式

IDL> array=indgen(8)IDL> print,array       0       1       2       3       4       5       6       7IDL> print,array[3]

IDL> array=indgen(8)IDL> print,array[-1]       7IDL> print,array[-5:-1]       3       4       5       6       7

2.向量方式

IDL> ;读取数组中第一，二，四和第六个元素的代码IDL> array=indgen(8)IDL> indices=[0,1,3,5]IDL> print,array[indices]       0       1       3       5

IDL> ;对30行20列的索引数组取出第6~10列中第12~15行的数据IDL> array=Indgen(20,30)IDL> subarray=array[5:9,11:14]IDL> help,subarraySUBARRAY        INT       = Array[5, 4]

IDL> ;提取第10行的值IDL> vectoer=array[*,9]IDL> help,vectorVECTOR          UNDEFINED = 
     

IDL> ;提取对角线元素IDL> arr=indgen(5,5)IDL> print,arr[indgen(5),indgen(5)]       0       6      12      18      24IDL> print,arr[indgen(5)*(5+1)]       0       6      12      18      24IDL> print,arr[0:(5*5-1):(5+1)]       0       6      12      18      24