       Help on use of Packages

• To: mathgroup at smc.vnet.net
• Subject: [mg2175] Help on use of Packages
• From: zheng at risky.ecs.umass.edu (Yuan Zheng)
• Date: Thu, 12 Oct 1995 01:58:24 -0400
• Organization: University of Massachusetts, Amherst

```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
-- Terminal graphics initialized --

In:=
In:= a = {{a11,a12},{a21,a22}}//MatrixForm
Out//MatrixForm= a11   a12

a21   a22

In:= b = {{b11,b12},{b21,b22}}//MatrixForm
Out//MatrixForm= b11   b12

b21   b22

In:= cc = AppendColumns[a,b]//MatrixForm
Out//MatrixForm= AppendColumns[a11   a12, b11   b12]

a21   a22  b21   b22

In:= Dimensions[cc]
Out= {1}

In:= dd = AppendRows[a,b]//MatrixForm
Out//MatrixForm= AppendRows[a11   a12, b11   b12]

a21   a22  b21   b22

In:= Dimensions[dd]
Out= {1}

In:= ee = BlockMatrix[ { {a,b},{b, {{0,0},{0,0}}}}]//MatrixForm
Out//MatrixForm=

AppendColumns[AppendRows[a11   a12, b11   b12],

>                            a21   a22  b21   b22

>   AppendRows[b11   b12, {{0, 0}, {0, 0}}]]

b21   b22

In:= Dimensions[ee]
Out= {1}

In:= Quit

```

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