Linked Questions

0
votes
2answers
1k views

Symbolic determinant is not computing [duplicate]

I'm trying to compute the determinant of a symbolic matrix made with the following code: ...
0
votes
1answer
1k views

Display problem multiplying matrix [duplicate]

I'm multiplying matrices and I don't get answer I want I just get matrix M times matrix N, there is no result. What to do and ...
2
votes
1answer
365 views

Mathematica won't multiply a numeric matrix by a symbolic matrix [duplicate]

If I1 = {{1,0},{1,-1}} and Acl = {{A , -B*K},{C*L, A-B*K-C*L}} where A, B, C, and D are not defined in the notebook. ...
0
votes
2answers
81 views

How to calculate $(X^tX)^{-1}X^tY$? [duplicate]

This is MatrixForm[ {{1., 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1.5, 1.5, 1.5, 2, 2, 2.2, 2.4, 2.5, 2.5, 2.8, 2.8, 3, 3, 3.2, 3.3}}] $X^t$ ...
1
vote
1answer
193 views

why does matrix multiplication in mathematica not produce one single product matrix [duplicate]

How can I get one single product matrix? Please help! Now:
2
votes
1answer
105 views

Unexpected behavior from `NumberForm` of a matix [duplicate]

If I calculate the dimension of the matrix after NumberForm directly, then there will be something wrong ...
0
votes
1answer
337 views

How can I force Mathematica to take the dot product here? [duplicate]

The code: vec1 = {{-1}, {0}, {1}} // MatrixForm vec2 = {{-1}, {1}, {0}} // MatrixForm p[v2_, v1_] := v1 (v1.v2)/Sqrt[(v1.v1) (v2.v2)]; u2 = vec2 - p[vec2, vec1] ...
1
vote
0answers
294 views

Matrix multiplication involving MatrixForm [duplicate]

Possible Duplicate: Why does MatrixForm affect calculations? I am doing a matrix multiplication, but not getting the desired output. I am doing the matrix multiplication of $A^{-1}B$ from the ...
0
votes
0answers
249 views

solving singular matrix [duplicate]

Hello I have a matrix that is singular, and i wanted to use linear solve to solve it but that doesn't work with mathematica. The matrix given as a list looks like this: ...
0
votes
2answers
88 views

Suggest how to do this matrix multiplication [duplicate]

Have a look at the Mathematica calculation ...
0
votes
1answer
139 views

Problem with List Dimension Outer Map [duplicate]

I am currently handling a big list which has the following dimension: {6, 3, 4, 2, 2, 1, 8} where the last number 8 represent a ...
0
votes
1answer
126 views

Why does Eigenvalues[matrix I defined] not work? [duplicate]

This is the code I have in my mathematica notebook. I want to find the eigenvalues of the matrix I created called Hmatrix as defined below. However when I type Eigenvalues[Hmatrix] I get the Hmatrix ...
2
votes
1answer
60 views

The ArrayFlatten seems to have no effect for some reason [duplicate]

I am a new Mathematica user, I am attempting to use ArrayFlatten but it seems not to work in this case. My codes are below, ...
2
votes
1answer
44 views

Unexpected behavior of ScientificForm when applied to a list [duplicate]

Consider a = Table[1, 100] la = Length[a] b = ScientificForm[a] lb = Length[b] la = 100 and ...
1
vote
1answer
68 views

How to interchange columns of a matrix? [duplicate]

Suppose I have a matrix M={{1,2,3},{4,5,6},{7,8,9}}//MatrixForm What code do I write to interchange columns and make it into ...

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