On Jun 18, 1:15 pm, David Fanning <n...@dfanning.com> wrote:
> Paul van Delst writes:
>> ryans...@gmail.com wrote:
>>> ive been reading some manuals and books for IDL but im not sure how to
>>> solve this likely simple problem.
>
>>> I have this I need to input to idl (.txt file):
>
>>> Name = {Joe}
>>> Department = {CS}
>>> Age = {25}
>
>>> and in IDL i need to save each attribute to its own variable. But if,
>>> lets day, department is ommited I want it to not input age as
>>> department. With c/c++ this isnt so bad as you can search the file for
>>> a 'keyword' and print the value from there, but I cant find how to do
>>> this in IDL.
>
>> Well, I don't think you can search the file in IDL, but you can read it in line by line
>> and search the lines. Why not create the file as IDL commands? e.g.:
>
>> ??
>
>> IDL> .run test
>> % Compiled module: TEST.
>> IDL> test
>> NAME STRING = 'Joe'
>> DEPARTMENT STRING = 'CS'
>> AGE INT = 25
>
>> IDL> $more test.input
>> Name = "Joe"
>> Department = "CS"
>> Age = 25
>
> Well, I'd do this a little differently:
>
> pro test, name, dept, age
>
> ; Create file to read
> openw, lun, 'test.input', /get_lun
> if n_elements(name) NE 0 then $
> printf, lun, 'Name = ' + name else $
> printf, lun, 'Name = '
> if n_elements(dept) NE 0 then $
> printf, lun, 'Department = ' + dept else $
> printf, lun, 'Department = '
> if n_elements(age) NE 0 then $
> printf, lun, 'Age = ' + StrTrim(age,2) else $
> printf, lun, 'Age = '
>
> free_lun, lun
>
> ; Now read the file
> openr, lun, 'test.input', /get_lun
> buffer = ' '
> while not eof(lun) do begin
> readf, lun, buffer
> parts = StrSplit(buffer, " ", /Extract)
> case n_elements(parts) of
> 2: print, 'No value for ' + parts[0]
> 3: print, parts[0] + '= {' + parts[2] + '}'
> else: print, 'Whoa, I am like totally confused!!'
> endcase
> endwhile
> free_lun, lun
> end
>
> Then try it like this:
>
> IDL> test, 'coyote', 'PE', 43
> Name= {coyote}
> Department= {PE}
> Age= {43}
>
> IDL> test
> No value for Name
> No value for Department
> No value for Age
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Thank you guys! these should help, although I cant have IDL writing
the program unfortunately. Ill have to figure out how to get the pre-
made files read.
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