# Mathematica Help with Table command and Matrix operations

1. Apr 6, 2012

### Amatya

Hi,

I need to generate some data in a Table and then be able to do all kinds of matrix and other mathematical operations on them. Right now I am testing the commands but am unable to get them to work. My table has this extra parenthesis floating around which I'm not sure how to get rid of.

Code (Text):
test = Table[{i^2, y /. Solve[2 y + i == 0]}, {i, 1, 10}]
Code (Text):
Out[8]={{1, {-(1/2)}}, {4, {-1}}, {9, {-(3/2)}}, {16, {-2}}, {25, {-(5/
2)}}, {36, {-3}}, {49, {-(7/2)}}, {64, {-4}}, {81, {-(9/
2)}}, {100, {-5}}}
Code (Text):
test2 = {{1/2, 0}, {0, 1/2}}

Now I am unable to multiply the two Matrices, Test 2x10 and Test2 2x2. I have tried
Code (Text):
test2.test
and also
Code (Text):
test.test2
and neither command works. Also, Test has this additional set of parenthesis around the entries in the second column, for example like this:
Code (Text):
{1, {-(1/2)}}
. I would like to be able to get rid of them if possible.. though I'm not sure if that messes anything up.

Any help will be greatly appreciated. Thanks a lot,

2. Apr 6, 2012

### FunkyDwarf

Replace your code with

Code (Text):

test=Table[{i^2,y/.Solve[2 y+i==0][[1]]},{i,1,10}]

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