实现IDL（不借助ENVI函数）和Matlab读取ENVI Standard文件。代码经测试，全部可以读取N波段的ENVI Standard文件，返回数据集矩阵。-Implement IDL (ENVI function without the aid) and Matlab read ENVI Standard file. The code has been tested, all bands can be read N ENVI Standard file and return the da