63 questions linked to/from Why does MatrixForm affect calculations?
39 views

Mathematica wrongly displays rows instead of columns [duplicate]

I want to perform some operations with certain column but when I tried to display the first column as it is shown in attached picture 1 (in some reference on web) of the table but Mathematica ...
37 views

Matrix Vector multiplication [duplicate]

I have a rather simple question which surprisingly i could find the answer theres a matrix $U$ whith is $4*4$ and a vector $A$ which is $4*1$ and when I wand to multiply them by $U.A$ operator i get ...
41 views

Why doesn't this evaluate further [duplicate]

The figure above shows the code as typed into Mathematica. In the fourth last line (or In[15] as you prefer) the expression is not evaluated to the fullest extent possible. Why does this occur? I ...
18 views

Matrix multiplication Q.W not working - Result=matrix Q . matrix W [duplicate]

When I write the code to do the dot product between two matrices, Mathematica does not compute it: How can I get the right matrix? EDIT Thank you for your willingness.
107 views

Solve vs Reduce and use of parameters

i'm new in the world of mathematica. i have a simple problem : i want to find a solution of a system of equations. The problems are: 1) Is it better to use Solve or Reduce (for this kind of ...
20 views

Why do I have to index my covariance matrix as if it has 3 dimensions [duplicate]

The language reference for getting parts of a matrix seems to make sense. I'm wondering why my covariance matrix behaves differently. ...
32 views

Adding two matrices together results in a weird result [duplicate]

I want to add two 10 by 10 matrices (same dimension) together but get a weird result. This is the screenshot of it: The matrices are defined in this manner: ...
14 views

Rank of symbolic matrix [duplicate]

I can't figure out why Mathematica can't calculate rank of a symbolic matrix. Please take a look at the attached screenshot below. If you need the full source code then you can find it in the "...
25 views

Matrices multiplification [duplicate]

I have to multiplty 2 matrices in Mathematica, but I have no idea how to force simplification. I create matrices by A={{a,1,b,},... and multiply using C=Dot=[A,B]//MatrixForm My problem is that ...
11 views

Creating 3x3 Matrix using Table Function and then accessing an element [duplicate]

I use the table function to create a 3x3 matrix in index notation. I assume that I can access the element in first row and first column using A[[1,1]] but instead ...
68 views

'MatrixForm' problem [duplicate]

I prefer to use 'MatrixForm' because the form looks better in matrix manipulation. But my current problem is that after the use of 'MatrixForm', subsequent matrix calculations like 'Det' or 'Inverse' ...
261 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: ...
27 views

Using functions as input for a function - won't simplify [duplicate]

I've defined a function P[k_] := 1/[Sqrt]2 (R[k] + L[k]) where R and L generate matrices. However the output of this function never full simplifies (even when I use the Simplify[%] functions). It ...
Possible Duplicate: Why does MatrixForm affect calculations? I have the following input: http://wstaw.org/m/2012/11/15/geogebra4.png Why is the matrix not computed, giving me a $2 \times 2$ ...