Re: Help on use of Packages
- To: mathgroup at smc.vnet.net
- Subject: [mg2211] Re: [mg2175] Help on use of Packages
- From: "Once again, its fishing season!" <DUGGAN at ecs.umass.edu>
- Date: Mon, 16 Oct 1995 11:53:57 -0400
Hello,
The solution to this problem is to load the package
LinearAlgebra`MatrixManipulation
If you are going to be doing a great deal of Matrix Manipulations you would
want to issue the command
Needs["LinearAlgebra`MatrixManipulation`"]--- mathematica's PC command
or
<<LinearAlgebra`MatrixManipulation --- mathematica's Ultrix command
What is occurring is that there is no definition loaded for
AppendColumns, AppendRows, etc.
You can check this using
?Append*
To see that this is the case, I suggest trying the following sequence of
commands at the start of a mathematica session on an ECS pc. [The user resides
at the same site as myself]
?Append*
Needs["LinearAlgebra`MatrixManipulation`"]
?Append*
On our Ultrix/Unix systems do the following:
?Append*
Needs["LinearAlgebra`MatrixManipulation`"]
?Append*
Be sure to have the apostrophes after LinearAlgebra and MatrixManipulation.
That should solve the problem.
John Duggan
Engineering Computer Services
Univ. Mass. Amherst
>>From: IN%"zheng at risky.ecs.umass.edu" 12-OCT-1995 09:42:23.36
To: mathgroup at smc.vnet.net
>>To: IN%"mathgroup at smc.vnet.net"
>>CC:
>>Subj: [mg2175] Help on use of Packages
>>Hi,
>>I have the following problem when I use the LinearAlgebra`MatrixManipulation
>>Package. I also use Math2.2 for DOS and wnmath2.2 notebook. All of them have
>>the same result.
>>I am new to the Mathematica. Are there something I am doing wrong? I followed
>>the exact procedure described on pp 218-219 in the book Guide to Standard
>>Mathematica Packages Version 2.2.
>>I need to do a lot of matrix manipulations in my symbolic computation. Could
>>somebody help me to solve this problem?
>>Thanks
>>Yuan Zheng
>>Dept of Mechanical Engineering
>>Umass, Amherst
>>The following is the screen display.
===============================================
Mathematica 2.2 for DEC RISC
Copyright 1988-93 Wolfram Research, Inc.
-- Terminal graphics initialized --
In[1]:=
In[2]:= a = {{a11,a12},{a21,a22}}//MatrixForm
Out[2]//MatrixForm= a11 a12
a21 a22
In[3]:= b = {{b11,b12},{b21,b22}}//MatrixForm
Out[3]//MatrixForm= b11 b12
b21 b22
In[4]:= cc = AppendColumns[a,b]//MatrixForm
Out[4]//MatrixForm= AppendColumns[a11 a12, b11 b12]
a21 a22 b21 b22
In[5]:= Dimensions[cc]
Out[5]= {1}
In[6]:= dd = AppendRows[a,b]//MatrixForm
Out[6]//MatrixForm= AppendRows[a11 a12, b11 b12]
a21 a22 b21 b22
In[7]:= Dimensions[dd]
Out[7]= {1}
In[8]:= ee = BlockMatrix[ { {a,b},{b, {{0,0},{0,0}}}}]//MatrixForm
Out[8]//MatrixForm=
AppendColumns[AppendRows[a11 a12, b11 b12],
> a21 a22 b21 b22
> AppendRows[b11 b12, {{0, 0}, {0, 0}}]]
b21 b22
In[9]:= Dimensions[ee]
Out[9]= {1}
In[10]:= Quit