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[Fortran 90] reading data

  1. Oct 20, 2012 #1
    hi dears
    I have a txt file as follows:
    "
    x1 Xi x2 x-EN y-EN EA EB ma gnetic
    ------------------------------------------------------&------------
    .0010 -.9990 .7322 .4042 -.3280 -.0002 -.3279 .0010
    .0010 -.9990 .7322 .4042 -.3280 -.0002 -.3279 .0010
    .0010 -.9800 .7210 .3917 -.3293 -.0030 -.3262 .0010
    .0010 -.9700 .7153 .3855 -.3297 -.0045 -.3252 .0010
    .0010 -.9600 .7096 .3796 -.3300 -.0060 -.3241 .0010
    .0010 -.9500 .7041 .3739 -.3302 -.0074 -.3228 .0010
    .0010 -.9400 .6987 .3684 -.3302 -.0089 -.3214 .0010
    .0010 -.9300 .6933 .3632 -.3301 -.0103 -.3199 .0010
    .0010 -.9200 .6880 .3581 -.3299 -.0117 -.3183 .0010
    .0010 -.9100 .6829 .3533 -.3296 -.0130 -.3166 .0010
    "
    i want to read this data in fortran 90 but i need only the real data. So I dont know how i can read them in such a way that the first two line is ignored. using /-format the .exe file can'nt read the real data and an error related to input-variable type is appeared.
    how you can help me.
    thanks
     
    Last edited: Oct 20, 2012
  2. jcsd
  3. Oct 20, 2012 #2
    Re: reading data

    Needless to say, whenever you are reading a file, you need to know ahead of time its precise format...otherwise, how would you know what to read where?

    So, if you know that your file starts with 2 or 3 comment lines, all you need to do is read those line into a character variable (string) long enough to read the entire line, say, 80 characters long. After you are done reading those 2 heading lines explicitly, then you can move on to some kind of loop where you can read your data.
     
  4. Oct 20, 2012 #3

    AlephZero

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    Science Advisor
    Homework Helper

    Re: reading data

    You don't need to read the lines into a variable, unless you want to print them out as a check you are reading the right file, or whatever.
    Code (Text):
    read(1,*)
    will read a line and ignore its contents.
     
  5. Oct 20, 2012 #4
    ok. can you give me a sample, e.g. in the above data?please
     
  6. Oct 20, 2012 #5
    It's been solved. with gratitude
    thanks
     
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