Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1997
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1997

[Date Index] [Thread Index] [Author Index]

Search the Archive

recursive use of Format

  • To: mathgroup at smc.vnet.net
  • Subject: [mg7313] recursive use of Format
  • From: Bob Young <ryoung at scicomp.com>
  • Date: Fri, 23 May 1997 01:41:47 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

I am encountering this problem with X unix notebooks.
I need to do layout formatting of functions that can occur
recursively. 

When I define a format 

Format[ zfn[ v1_, v2_]]  :=
 FractionBox[ RowBox[ {zzz, "---", v1}],
	      v2];

an input of
zfn[ 100, 200]
produces a cell for which DisplayForm is correct.  Neither FractionBox
nor RowBox appear literally in the notebook


This cell is, for the details
Cell[BoxData[
    RowBox[{"FractionBox", "[", 
      RowBox[{
        RowBox[{"RowBox", "[", 
          RowBox[{"{", 
            RowBox[{"zzz", ",", "\<\"---\"\>", ",", "100"}], "}"}],
           "]"}], ",", "200"}], "]"}]], "Output",
  CellLabel->"Out[70]="]


However, an input of
zfn[ zfn[ 100, 200], 999]

produces a correct display of the inner form, but 
FractionBox[ Rowbox ...]] does not turn into the graphical form when DisplayForm is
applied,


again, here is the cell
Cell[BoxData[
    TagBox[
      RowBox[{"FractionBox", "[", 
        RowBox[{
          RowBox[{"RowBox", "[", 
            RowBox[{"{", 
              RowBox[{"zzz", ",", "\<\"---\"\>", ",", 
                FractionBox[
                  RowBox[{"zzz", 
                    RowBox[{"--", "-"}], "100"}], "200"]}], "}"}], 
            "]"}], ",", "999"}], "]"}],
      DisplayForm]], "Output",
  CellLabel->"Out[72]//DisplayForm="]


Any suggestions for a correction or workaround would be much appreciated.

Bob Young
SciComp Inc
5806 Mesa, Suite 250
Austin, TX 78731

512-451-1434
512-451-1622 (FAX)

e-mail: ryoung at SciComp.com
http://www.sig.net/~scicomp



  • Prev by Date: Bug Reports or Technical Support?
  • Next by Date: Re: Simple 3D Graph
  • Previous by thread: Re: Bug Reports or Technical Support?
  • Next by thread: Please Help Me!!!