# Tagged Questions

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### Matrix inverses on matlab: are pinv and ./ related?

I faced with two actual implementations of the same problem, and need some help to find which one is correct. Let K be an non-square $m \times n$ matrix (a product of two eigenvalues vectors), B an ...
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### Singularity in matrix when inverting in Matlab

As data I get a matrix A but in my algorithm I need to work on its inverse. What I do is: C = inv(A) + B; Then in another line I update A. In the next cycles I ...
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### Finding matrix inverse by Gaussian Elimination With Partial Pivoting

Hello guys I am writing program to compute determinant(this part i already did) and Inverse matrix with GEPP. Here problem arises since i have completely no idea how to inverse Matrix using GEPP, i ...
6k views

### Matrix is singular to working precision

I have a problem while evaluating inverse using inv in MATLAB. My matrix looks like this: ...
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### To invert a Matrix, Condition number should be less than what?

I see that there is a matlab tag in this site, so I ask my question here and not in stackoverflow although it is also related to programming in matlab. I am going to invert a positive definite matrix ...
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### Should I check Multicollinearity When There is An Inverse?

At Machine Learning algorithms there are usually inversion process about matrices and sometimes Matlab throws error when Multicollinearity occurs. Should I check Multicollinearity(and how) everytime ...
I want to generate random numbers from a multivariate normal distribution in Matlab. Normally, this is done like: $w = \overline{w} + \text{chol}(\Sigma) \cdot \vec{l}$ But in my case I don't know ...