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The *row+( Command

Command Summary Command Syntax Calculator Compatibility Token Size
Adds a multiple of one row of a matrix to another. row+(factor,matrix,row1,row2*) TI-83/84/+/SE 1 byte

Press:
1. MATRX (on a TI-83) or 2nd MATRX (TI-83+ or higher) to access the matrix menu.
2. RIGHT to access the MATH submenu.
3. ALPHA F to select *row+(, or use arrows and ENTER.

The *row+( Command

The *row+( adds a multiple of one row to another row and returns the result. It is an elementary row operation used in Gaussian Elimination. 

[[1,2][3,4]]
    [[1 2]
     [3 4]]
*row+(10,Ans,1,2)
    [[3  4 ]
     [31 42]]

Advanced Uses

You can add columns instead of rows with the aid of the T (transpose) command.

Error Conditions

  • ERR:INVALID DIM is thrown if one of the row arguments isn't a valid row (larger than the matrix size, or otherwise bad)
Authors: KG