64 questions linked to/from Why does MatrixForm affect calculations?
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Symbolic determinant is not computing [duplicate]

I'm trying to compute the determinant of a symbolic matrix made with the following code: ...
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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 ...
542 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. ...
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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}}] $X^t$ ...
389 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] ...
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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 ...
295 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 ...
256 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: ...
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Suggest how to do this matrix multiplication [duplicate]

Have a look at the Mathematica calculation ...
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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 ...
128 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 ...
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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, ...