MATRIX ADD ROW

MATRIX ADD ROW (LET)

Let Subcommand

Add a row to an existing matrix.

It is sometimes convenient to add an observaton (i.e., a row) to an already existing data matrix. This command allows you to do that in a simple way.

LET <mat2> = MATRIX ADD ROW <mat1> <x>
where <mat1> is the original data matrix;
<x> is a vector containing the data values for the new row of data;
and where <mat2> is the resulting matrix.

Note that <mat2> is typically the same as <mat1>. Also, the number of rows in <x> should be equal to the number of columns in <mat1>.

LET M = MATRIX ADD ROW M X

Matrices are created with either the READ MATRIX command or the MATRIX DEFINITION command. Enter HELP MATRIX DEFINITION and HELP READ MATRIX for details.

None

None

READ MATRIX	= Read a matrix.
MATRIX COLUMN DIMENSION	= Dimension maximum number of columns for Dataplot matrices.
MATRIX DELETE ROW	= Delete a row from a matrix.
MATRIX ROW	= Copy a row of a matrix to a column.

Multivariate Analysis

1998/8

READ MATRIX M
1 2 3
4 5 6
7 8 9
END OF DATA
LET X = DATA 10 11 12
LET M = MATRIX ADD ROW M X
PRINT M