converting a character string into a variable name
in [Fortran]
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From: MuxaB on 10 Jun 2010 19:11 I have a FORTRAN question. The problems is: I want to write several variables, arrays and scalars, out to a file. I want to store the names of these variables in character strings to be used in the routine that writes the data out. For example, for the array called PRESSURE(istart:iend), I would store 'PRESSURE' in a character variable say CHAROUT of type character*10 (the PRESSURE array dimensions will be stored elsewhere). The question is: is there a way to convert that character string back into the variable name? That is, starting with CHAROUT='PRESSURE', figure out the variable name PRESSURE and use it to write out the data.
From: dpb on 10 Jun 2010 20:10 MuxaB wrote: .... > The question is: is there a way to convert that character string back > into the variable name? That is, starting with CHAROUT='PRESSURE', > figure out the variable name PRESSURE and use it to write out the > data. Short Fortran answer is "no"... --
From: robin on 10 Jun 2010 21:14 "MuxaB" <mike(a)flow3d.com> wrote in message news:5c8f6eb4-e0b7-4344-b3ab-7dc23e5ef539(a)z13g2000prh.googlegroups.com... |I have a FORTRAN question. | | The problems is: | | I want to write several variables, arrays and scalars, out to a file. | I want to store the names of these variables in character strings to | be used in the routine that writes the data out. For example, for the | array called PRESSURE(istart:iend), I would store 'PRESSURE' in a | character variable say CHAROUT of type character*10 (the PRESSURE | array dimensions will be stored elsewhere). | | The question is: is there a way to convert that character string back | into the variable name? That is, starting with CHAROUT='PRESSURE', | figure out the variable name PRESSURE and use it to write out the | data. Closest would be NAMELIST
From: Jovan Cormac on 11 Jun 2010 02:21 MuxaB wrote: > I have a FORTRAN question. > > The problems is: > > I want to write several variables, arrays and scalars, out to a file. > I want to store the names of these variables in character strings to > be used in the routine that writes the data out. For example, for the > array called PRESSURE(istart:iend), I would store 'PRESSURE' in a > character variable say CHAROUT of type character*10 (the PRESSURE > array dimensions will be stored elsewhere). > > The question is: is there a way to convert that character string back > into the variable name? That is, starting with CHAROUT='PRESSURE', > figure out the variable name PRESSURE and use it to write out the > data. There is no way to *automatically* do that in standard Fortran; however, you can manually set up a construct like this: SELECT CASE (CHAROUT) CASE ('PRESSURE') output_string = PRESSURE ! You might need to preformat here CASE ('...') .... END SELECT WRITE(*,*) output_string -- -- jovan
From: analyst41 on 11 Jun 2010 07:44
On Jun 10, 8:10 pm, dpb <n...(a)non.net> wrote: > MuxaB wrote: > > ... > > > The question is: is there a way to convert that character string back > > into the variable name? That is, starting with CHAROUT='PRESSURE', > > figure out the variable name PRESSURE and use it to write out the > > data. > > Short Fortran answer is "no"... > > -- I think what we are talking about here is metadata. A database for example has column names and types along with the data and a select * would give you all the columns along with their names. |