读取文本文件

youknownwhat

如何读取ASCII文件，直接忽略里面的每行带#的注释

liuyalong008

可以参考一下论坛的正则系列的帖子

1. s={'1adfadsfadsf'
   
2.     '#2adsfadsfadsfadsfadsfadsf'
   
3.     '3asdfasdfadsfadsfads'
   
4.      '4adsfadsfadsfadsfadsfadsf'
   
5.     '5asdfasdfadsfadsfads'
   
6.      '#6adsfadsfadsfadsfadsfadsf'
   
7.     '7asdfasdfadsfadsfads'
   
8.      '#8adsfadsfadsfadsfadsfadsf'
   
9.     '9asdfasdfadsfadsfads'
   
10.     '#10adsfadsfadsfadsfadsfadsf'
    
11.     '#11asdfasdfadsfadsfads'
    
12.     }
    
13. x=regexprep(s,'#\w*','')

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1. >> x=regexprep(s,'#\w*','')
   
2. 
   
3. x =
   
4. 
   
5.     '1adfadsfadsf'
   
6.     ''
   
7.     '3asdfasdfadsfadsfads'
   
8.     '4adsfadsfadsfadsfadsfadsf'
   
9.     '5asdfasdfadsfadsfads'
   
10.     ''
    
11.     '7asdfasdfadsfadsfads'
    
12.     ''
    
13.     '9asdfasdfadsfadsfads'
    
14.     ''
    
15.     ''
    

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不过你首先需要把文本读进来：

1. fid = fopen(name);
   
2. data = textscan(fid, '%s',  'Delimiter', '\n');
   
3. s=data{:}
   

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youknownwhat

liuyalong008 发表于 2013-6-17 19:27
可以参考一下论坛的正则系列的帖子不过你首先需要把文本读进来：

问题补充，我的数据每行格式：
    1,00000,142,1,32400,N,159600,E, ship.obsDay04.rcvJan05
    2,00000,142,1,32100,N,158500,E, ship.obsDay04.rcvJan05
    3,00000,142,1,31400,N,135400,E, ship.obsDay04.rcvJan05
读取之后，需要根据每个字段的值删选数据，我是定义结构体容易操作，还是定义N个数组分别存储？

liuyalong008

youknownwhat 发表于 2013-6-17 19:59
问题补充，我的数据每行格式：
    1,00000,142,1,32400,N,159600,E, ship.obsDay04.rcvJan05
    2,0000 ...

still  regular expression ！！！
假设你的数据存放在cell中

1. s={'1,00000,142,1,32400,N,159600,E, ship.obsDay04.rcvJan05'
   
2.    '2,00000,142,1,32100,N,158500,E, ship.obsDay04.rcvJan05'
   
3.    '3,00000,142,1,31400,N,135400,E, ship.obsDay04.rcvJan05'}

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step: extract digits

1. d=regexp(s,'\d*','match')
   
2. t=reshape([d{:}],[],numel(d))'
   

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1. t =
   
2. 
   
3.     '1'    '00000'    '142'    '1'    '32400'    '159600'    '04'    '05'
   
4.     '2'    '00000'    '142'    '1'    '32100'    '158500'    '04'    '05'
   
5.     '3'    '00000'    '142'    '1'    '31400'    '135400'    '04'    '05'

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step2: get Lat or Lon (i guess)

1. L=regexp(s,'[SNEW]','match')
   
2. Sign=reshape([L{:}],[],numel(L))'

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1. Sign =
   
2. 
   
3.     'N'    'E'
   
4.     'N'    'E'
   
5.     'N'    'E'

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