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+
+// Copyright (C) 2010 - DIGITEO - Michael Baudin
+//
+// This file must be used under the terms of the GNU LGPL license.
+
+function errmsg = Checkdims ( funname , var , varname , ivar , matdims )
+  // Generates an error if the variable has not the required size.
+  //
+  // Calling Sequence
+  //   errmsg = Checkdims ( funname , var , varname , ivar , matdims )
+  //
+  // Parameters
+  //   funname : a 1 x 1 matrix of strings, the name of the calling function.
+  //   var : a 1 x 1 matrix of valid Scilab data type, the variable
+  //   varname : a 1 x 1 matrix of string, the name of the variable
+  //   ivar : a 1 x 1 matrix of floating point integers, the index of the input argument in the calling sequence
+  //   matdims : 1 x 2 matrix of floating point integers, the number of rows, columns for the variable #ivar
+  //   errmsg : a 1 x 1 matrix of strings, the error message. If there was no error, the error message is the empty matrix.
+  //
+  // Description
+  // This function is designed to be used to design functions where 
+  // the input argument has a known shape.
+  // This function cannot be use when var is a function, or more
+  // generally, for any input argument for which the size function
+  // does not work.
+  //   Last update : 05/08/2010.
+  //
+  // Examples
+  // // The function takes a 2 x 3 matrix of doubles.
+  // function y = myfunction ( x )
+  //   Checkdims ( "myfunction" , x , "x" , 1 , [2 3] )
+  //   y = x
+  // endfunction
+  // // Calling sequences which work
+  // y = myfunction ( ones(2,3) )
+  // y = myfunction ( zeros(2,3) )
+  // // Calling sequences which generate an error
+  // y = myfunction ( ones(1,3) )
+  // y = myfunction ( zeros(2,4) )
+  //
+  // Authors
+  //   Michael Baudin - 2010 - DIGITEO
+  //
+
+  [lhs,rhs]=argn()
+  Checkrhs ( funname , rhs , 5 )
+  Checklhs ( funname , lhs , [0 1] )
+
+  errmsg = []
+  if ( or ( size(var) <> matdims ) ) then
+    strexp = strcat(string(matdims)," ")
+    strcomp = strcat(string(size(var))," ")
+    errmsg = msprintf(gettext("%s: Expected size [%s] for input argument %s at input #%d, but got [%s] instead."), funname, strexp, varname , ivar , strcomp );
+    error(errmsg)
+  end
+endfunction