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# Questions tagged [matrix]

In mathematics, a matrix (plural matrices) is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns. The individual items in a matrix are called its elements or entries.

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### Matrix multiplication of arbitrary sizes [closed]

This function is for multiplying two matrices together. It's kind of messed up because the result is actually supposed to overwrite the object that called it, or since it's ...
67 views

### Combine Matrix Columns JavaScript

I did this Codepen to combine all the columns from one matrix in JS. ...
105 views

### Numerical algebra using a Matrix class [closed]

I would like to make a Matrix class. Can any of you help me about this class? There are two ways: ...
297 views

### In matrix, if a zero is found, make its row and column to all zero

I am making an ArrayList, keeping note of all the indices where zero has occurred. Later on, I am taking out the indices from ...
22 views

### Python overflow cause by product of many probabilities, inversion of a large covariance matrix, and computation of its determinant [closed]

So I have a function like this: ...
6k views

### Sum of diagonal elements in a matrix [closed]

The idea is to calculate sum of diagonals example [[1,2,3],[4,5,6],[7,8,9] the correct answer would be [1,5,9][3,5,7] = total 30 ...
79 views

### About the problem of seeking matrix inverse

Recently I have solved the inverse matrix in three ways, found that their work efficiency has obvious differences. This is the case: ...