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 Author Comment/Response Bill Simpson 03/24/13 11:53pm You do not need to be sorry with me for your grammar. Your use of English is much better than my use of almost any other language except mathematics and Mathematica and a dozen other computer languages. If you could provide a function or equation that calculates the value of C[[x,y]] from A and B for all x and y and which assumes A[[p,q]] and B[[r,s]] will be zero when outside matrix A or B then perhaps we could translate that function into Mathematica. Perhaps you can use this to write your own code. In[1]:= v={{1,2,3},{4,5,6}}; myPart[m_,i_,j_]:=If[i>Length[m]||j>Length[First[m]],0,m[[i,j]]]; Print[v[[2,3]]]; Print[v[[2,4]]]; Print[myPart[v,2,3]]; Print[myPart[v,2,4]]; From In[1]:= 6 From In[1]:= Part::partw: Part 4 of {4, 5, 6} does not exist. {{1,2,3},{4,5,6}}[[2,4]] From In[1]:= 6 From In[1]:= 0 myPart[A,x,y]==A[[x,y]] when x,y are inside A and myPart[A,x,y]==0 when x or y are outside A. myPart[C,x,y]=4 does not allow you to assign 4 to a part of C, only to obtain values from C. URL: ,

 Subject (listing for 'Help with creating matrix from another matrix') Author Date Posted Help with creating matrix from another matrix Anton Siswo 03/24/13 01:15am Re: Help with creating matrix from another matrix Bill Simpson 03/24/13 11:53pm Re: Re: Help with creating matrix from another ... Anton Siswo 03/25/13 11:35am Re: Re: Re: Help with creating matrix from anot... Bill Simpson 03/25/13 7:32pm Re: Re: Re: Help with creating matrix from anot... Bill Simpson 03/25/13 10:20pm Re: Re: Re: Re: Help with creating matrix from ... Anton Siswo 03/31/13 7:22pm Re: Re: Re: Re: Re: Help with creating matrix f... Bill Simpson 04/01/13 00:06am Re: Re: Re: Re: Re: Re: Help with creating matr... Anton Siswo 04/01/13 5:52pm Re: Re: Re: Re: Re: Help with creating matrix f... Bill Simpson 04/01/13 10:44am Re: Re: Re: Re: Re: Re: Help with creating matr... Anton Siswo 04/08/13 04:52am Re: Re: Re: Re: Re: Re: Re: Help with creating ... Bill Simpson 04/09/13 8:35pm Re: Re: Re: Re: Re: Re: Re: Re: Help with creat... Anton Siswo 04/11/13 10:58am Re: Re: Re: Re: Re: Re: Re: Help with creating ... Bill Simpson 04/09/13 9:54pm Re: Re: Re: Re: Re: Re: Re: Re: Help with creat... Anton Siswo 04/10/13 9:41pm Re: Re: Re: Re: Re: Re: Re: Re: Re: Help with c... Bill Simpson 04/12/13 00:35am Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Help wi... Anton Siswo 04/16/13 07:19am Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Hel... Bill Simpson 04/16/13 7:48pm Re: Help with creating matrix from another matrix Anton Siswo 03/26/13 11:29pm
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