out1.f.html

out1.f.html
Source file: out1.f
Directory: /home/rjl/git/rjleveque/clawpack-4.x/book/chap16/vctraffic
Converted: Tue Jul 26 2011 at 12:59:01 using clawcode2html
This documentation file will not reflect any later changes in the source file.
 
c
c
c =========================================================
      subroutine out1(maxmx,meqn,mbc,mx,xlower,dx,q,t,iframe,aux,maux)
c =========================================================
c
c     # Output the results for a general system of conservation laws
c     # in 1 dimension
c
      implicit double precision (a-h,o-z)
      dimension q(1-mbc:maxmx+mbc, meqn)
      character*10 fname1, fname2
      common /cout/ umax(-1:20002)
c
c     # Write the results to the file fort.q</font>
<font color="blue">c     # Use format required by matlab script  plotclaw1.m</font>
<font color="blue">c     # The same format is used by the amrclaw package.  </font>
<font color="blue">c     # Here it's adapted to output just the single grid.</font>
<font color="blue">c</font>
<font color="blue">c     # first create the file name and open file</font>
<font color="blue">c</font>
         fname1 = 'fort.qxxxx'
         fname2 = 'fort.txxxx'
         nstp = iframe
         do 55 ipos = 10, 7, -1
            idigit = mod(nstp,10)
            fname1(ipos:ipos) = char(ichar('0') + idigit)
            fname2(ipos:ipos) = char(ichar('0') + idigit)
            nstp = nstp / 10
 55      continue

         open(unit=50,file=fname1,status='unknown',form='formatted')
         open(unit=60,file=fname2,status='unknown',form='formatted')

<font color="blue">c</font>
<font color="blue">c     # the following parameters are used in amrclaw where there are</font>
<font color="blue">c     # multiple grids.  Here they are all set to 1:</font>
      ngrids = 1
      mptr = 1
      level = 1

      write(50,1001) mptr,level,mx
 1001 format(i5,'                 grid_number',/,
     &       i5,'                 AMR_level',/,
     &       i5,'                 mx')

      write(50,1002) xlower,dx
 1002 format(e18.8,'    xlow', /,
     &       e18.8,'    dx', /)
<font color="blue">c</font>
        do 10 i=1,mx
          do m=1,meqn
<font color="blue">c            # exponents with more than 2 digits cause problems reading</font>
<font color="blue">c            # into matlab... reset tiny values to zero:</font>
             if (dabs(q(i,m)) .lt. 1d-99) q(i,m) = 0.d0
             vel = umax(i)*(1.d0 - q(i,m))
             enddo
<font color="blue">c</font>
          write(50,1005) (q(i,m), m=1,meqn), vel
 1005     format(4e16.8)
<font color="blue">c</font>
 10       continue
        write(50,*) ' '
 20     continue
      write(50,*) ' '

      write(60,1000) t,meqn+1,ngrids,maux,1
 1000 format(e18.8,'    time', /, 
     &       i5,'                 meqn'/,
     &       i5,'                 ngrids'/,
     &       i5,'                 maux'/,
     &       i5,'                 ndim'/,/)
<font color="blue">c</font>

      close(unit=50)
      close(unit=60)

      return
      end
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