IDL commonly used string processing functions

In the process of remote sensing image processing, the problem of storing data naming is always encountered, and the effective use of IDL string function can achieve the desired effect.

1.file_basename (): Return file name

File = ' F:\data\myfile.img ' title = file_basename (file, '. img ') print,title  >myfile

2.file_dirname (): Returns the folder name

File = ' F:\data\myfile.img ' title = file_dirname (file) print,title  >f:\data

3.STRCMP (): Compare strings for the same

Print, STRCMP (' Moose ', ' Moo ', 3,/fold_case) >1; determine whether the first three of the two strings match, return, 1, or 0   plus the keyword/fold_case case-insensitive

4.STRLEN (): Calculate string length

Print,strlen (' ABCD ') >4

5.STRTRIM (): Remove the space in the string, n=0, means to remove the trailing space, n=1 remove the front space, n=2 front and rear of the fort space are removed

Print,strtrim (' abc ', 0) >abc

6.STRMID (): From the N1 position of the string, remove the N2 characters of the substring, if omitted N2, then read to the end of the string,/reverse_offset refers to from the tail count

Print,strmid ' ABCD ', 0,2) >ab

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IDL commonly used string processing functions