File: cell2mat.sci

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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA - Farid BELAHCENE
// 
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution.  The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt

function y= cell2mat(c)

// This function returns a matrix which is the result of concatenation of all components of the cell c
// Input : c, a cell. All components of c must have the same data type (strings or doubles or integers or booleans)
// Moreover all components of c must be scalar, vector or matrix 
// Output : y, a matrix or a hypermatrix
// F.B

  rhs = argn(2);

  if rhs <> 1 then
    error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"cell2mat",1));
  end

if isempty(c) then
  y=[]
  return
else
  if typeof(c) <> "ce" then //input argument must be a cell
    error(msprintf(gettext("%s: Wrong type for input argument #%d: Cell expected.\n"),"cell2mat",1));
  end
  cecomptype=typeof(c(1).entries) //cecomptype is the type of the first component of the cell
  for i=1:prod(size(c))
    if typeof(c(i).entries) <> cecomptype then //all components of input cell must have the same type
      error(msprintf(gettext("%s: Wrong type for input argument #%d: Same type expected for all cell contents"),"cell2mat",1));
    end
  end
  if  0 < size(size(c),"*") & size(size(c),"*") <= 2 then //size of cell is least or equal to 2
    ytemp=list(1:size(c,1));
    for i=1:size(c,1)
      ytemp(i)=c(i,1).entries;
      for j=2:size(c,2)
	ytemp(i)=[ytemp(i) c(i,j).entries];
      end
      if i==1 then
	y=ytemp(i);
      else
	y=[y;ytemp(i)];
      end
    end
    if typeof(y)=="string" then
      for i=1:size(y,1)
	y(i)=strcat(y(i,:))
      end
      y=y(:,1)
    end
  else //size of cell is more than 2
    csize=size(c)
    csizeprod=prod(csize)
    ytemp=list(1:csizeprod/(size(c,1)*size(c,2)))
    for l=1:csizeprod/(size(c,1)*size(c,2))
      ylist=list(1:size(c,1))
      for i=1:size(c,1)
	ylist(i)=c(i,1,l).entries;
	for j=2:size(c,2)
	  ylist(i)=[ylist(i) c(i,j,l).entries];
	end
	if i==1 then
	  ytemp(l)=ylist(i);
	else
	  ytemp(l)=[ytemp(l);ylist(i)];
	end
      end	  
    end
    if typeof(ylist(i))=="string" then
      y=[]
      for l=1:csizeprod/(size(c,1)*size(c,2))
	for i=1:size(ytemp(l),1)
	  y($+1)=strcat(ytemp(l)(i,:))
	end
      end
      n=size(csize,"*")
      ysize=[size(ytemp(1),1),csize(3:n)]
      y=matrix(y,ysize)
    else
      n=size(csize,"*")
      ysize=[size(ytemp(1)),csize(3:n)]
      y=matrix(1:prod(ysize),ysize)
      for l=1:csizeprod/(size(c,1)*size(c,2))
	y(:,:,l)=ytemp(l)
      end
    end
  end
end
endfunction