Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2004
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

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

Search the Archive

newbie myHead question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47017] newbie myHead question
  • From: János <janos.lobb at yale.edu>
  • Date: Sat, 20 Mar 2004 03:50:29 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

I have

m = {{a, b}, {a, b}, {a, b}}

When I apply Transpose to it, I will have

Transpose[m]

{{a, a, a}, {b, b, b}}

The FullForm of it is

List[List[a, a, a], List[b, b, b]]

Now, if I do

n = Apply[myHead, m]

I get

myHead[{a, b}, {a, b}, {a, b}]

If I apply Transpose to it, I get

Transpose[n]

Transpose[myHead[{a, b}, {a, b}, {a, b}]]

The FullForm of it

Transpose[myHead[List[a, b], List[a, b], List[a, b]]]

which is not that I need.  I need

myHead[{a,a,a},{b,b,b}]

or

myHead[List[a, a, a], List[b, b, b]]

What am I missing ?  What should I do to get myHead[{a,a,a},{b,b,b}] ?

Thanks ahead,

János
-------------------------------------------------
clear perl code is better than unclear awk code; but NOTHING comes 
close to unclear perl code
http://www.faqs.org/faqs/computer-lang/awk/faq/


  • Prev by Date: Off[General::spell]
  • Next by Date: Re: Notebook path in title bar of window and/or notebooks menu
  • Previous by thread: Off[General::spell]
  • Next by thread: Re: newbie myHead question