Documentation

Dimensions

Before working with a matrix you have to choose the dimensions entering the desired number of rows and columns. Default values are 3x3, as in figure below. Maximum values are 9x9.

Transpose

If you have an mxn matrix the transpose is a new matrix nxm, same values but inverted rows an columns.

Inverse

Inverse of a matrix doesn't always exist, the matrix must be invertible.

STO

Command STO stores the values of the current matrix. You can recall it with command RCL. You can store only one matrix at time. It is useful if you want to multiply two matrices.

RCL

Recalls a previously stored matrix.

Linear Eq.

Solves a system of n linear equations in n unknowns. Set the nxn dimensions, then fill the values of the coefficients. In the n+1 column set the known values. The equations have to be independent. The system is solved with Gauss substitution with partial pivoting. It can solve up to 9 equations in 9 unknown where in the 10th column there are the known values.

Example:


+3x +2y -5z = -2
+1x -2y +4z = 5.3
-2x +2y -7z = -1



Results are displayed in the first column.

Multiply

Matrix multiplication is done rows x colums so pay attention to dimensions. If you want to multiply matrix A and matrix B, set values for A, store with STO, enter values for matrix B (must have as many rows as A's columns) and press multiply.