Module: NumRu::GPhys::IO_Common

Defined in:
lib/numru/gphys/gphys_io_common.rb

Class Method Summary collapse

Class Method Details

.each_along_dims_write(gphyses, files, loopdims, io_module) ⇒ Object 



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# File 'lib/numru/gphys/gphys_io_common.rb', line 20

def each_along_dims_write(gphyses, files, loopdims, io_module)
  if !gphyses.is_a?(Array)
    gphyses = [gphyses]     # put in an Array (if a single GPhys)
  end
  gp = gphyses[0]

  if !files.is_a?(Array)
    files = [files]     # put in an Array (if a single File)
  end

  if !loopdims.is_a?(Array)
    loopdims = [loopdims]  # put in an Array (if a single Integer/String)
  end
  if loopdims.length == 0
    raise ArgumentError, "No loop dimension is specified "+
      " -- In that case, you don't need this iterator."
  end

  #if loopdims.min<0 || loopdims.max>=gp.rank
  #  raise ArguemntError,"Invalid dims #{loopdims.inspect} for #{gp.rank}D array"
  #end

  loopdimids = Array.new
  loopdimnames = Array.new
  loopdims.each{|d|
    case d
    when Integer
      if d < 0
 d += gp.rank
      end
      loopdimids.push( d )
      loopdimnames.push( gp.axis(d).name )
    when String
      loopdimids.push( gp.dim_index(d) )
      loopdimnames.push( d )
    else
      raise ArgumentError,"loopdims must consist of Integer and/or String"
    end
  }

  sh = Array.new
  len = 1
  loopdimids.each{|i|
    sh.push(gp.shape[i])
    len *= gp.shape[i]
  }

  gphyses.each do |g|
    for i in 1...gphyses.length
      loopdimnames.each_with_index do |nm,i|
 if !g.axnames.include?( nm )
    raise ArgumentError,"#{i+1}-th GPhys do not have dim '#{nm}'"
 end
 if g.coord(nm).length != sh[i]
    raise ArgumentError,"loop dimensions must have the same lengths(#{nm}; #{sh[i]} vs #{g.coord(nm).length})"
 end
      end
    end
  end

  cs = [1]
  (1...sh.length).each{|i| cs[i] = sh[i-1]*cs[i-1]}
  idx_hash = Hash.new
  for i in 0...len do
    loopdimnames.each_with_index{|d,j| 
      idx_hash[d] = ((i/cs[j])%sh[j])..((i/cs[j])%sh[j]) # rank preserved
    }
    subs = gphyses.collect{|g| g[idx_hash] }
    results = yield(*subs)
    if !results.is_a?(Array)
      raise "The return value of the block must be an Array of GPhys" 
    end
    if i == 0
      fl = files.shift
      results_whole = Array.new
      for j in 0...results.length
 rs = results[j]
 grid = rs.grid_copy
 loopdimnames.each{|nm|
          # replaces with original axes (full length)
    if !grid.axnames.include?( nm )
      raise "Dimension '#{nm}' has been eliminated. "+
                  "You must keep all loop dimensions." 
    end
    grid.set_axis(nm,gphyses[0].axis(nm))
 }
 grid_new = io_module.write_grid(fl, grid)
 results_whole.push( 
    GPhys.new( grid_new,
io_module.def_var(fl, rs.name, rs.data.ntype, 
           grid_new.axnames, rs.data)
        )
 )
 fl = files.shift if files.length >= 1
      end
    end
    for j in 0...results.length
      rs = results[j]
      results_whole[j][idx_hash] = rs.data
    end
  end
  return results_whole

end