Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*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 2005

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

Search the Archive

MapThread Replace?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56451] MapThread Replace?
  • From: leigh pascoe <leigh at cephb.fr>
  • Date: Tue, 26 Apr 2005 01:32:51 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Dear Mathgroup,

Thanks to your help I have a list of 2x2 symbolic matrices involving the 
variables (x,y) generated by substituting the constants (a,b,c,d,e,f,g) 
from a list of such constants

In[10]:=
m:={{-D[D[L,x],x],-D[D[L,x],y]},{-D[D[L,y],x],-D[D[L,y],y]}}//MatrixForm

In[11]:=
mats=N[m /. subs]

I also have a list of (y,x} values corresponding to each matrix in the 
list. I would like to substitute each (x,y) pair in the corresponding 
matrix and invert the resulting matrix to produce a list of the 2x2 
inverses of the original matrices.

I can invert the matrices symbolically with

In[16]:=
Map[Inv[#]&,mats]

but I can't seem to find the correct command/syntax to substitute the 
corresponding (x,y) pair, either before or after the inversion step. Any 
suggestions appreciated.

Leigh


  • Prev by Date: Re: multiple choice IF condition
  • Next by Date: odd mathematica blindspot
  • Previous by thread: Re: can Mathematica be useful for this?
  • Next by thread: odd mathematica blindspot