MATRIX COMBINE COLUMNS

MATRIX COMBINE COLUMNS (LET)

Let Subcommand

Combine two matrices by columns.

It is sometimes convenient to extend the columns of one matrix with the columns of another matrix.

For example, given the matrices

        M1 = | 1   2 |
             | 3   4 |
    

and

        M2 = | 5   6 |
             | 7   8 |
    

this command will generate the matrix

        M3 = | 1   2  5  6 |
             | 3   4  7  8 |
    

This command requires that the two input matrices have the same number of rows.

LET <m3> = MATRIX COMBINE COLUMNS <m1> <m2>
where <m1> is the first input matrix;
<m2> is the second input matrix;
and      <m3> is the resulting matrix.

Note that <m3> can be the same name as either <m1> or <m2>.

LET M3 = MATRIX COMBINE COLUMNS M1 M2
LET MOUT = MATRIX COMBINE COLUMNS M1 M2

Matrices can be created with the READ MATRIX, CREATE MATRIX or MATRIX DEFINITION commands.

None

MATRIX AUGMENT

MATRIX COMBINE ROWS	= Combine the rows of two matrices.
READ MATRIX	= Read a matrix.
CREATE MATRIX	= Create a matrix from existing columns.
MATRIX DIMENSION	= Dimension maximum number of columns or rows for Dataplot matrices.

Multivariate Analysis

2011/1

 
dimension 100 columns
.
read matrix m1
1 2
3 4
end of data
.
read matrix m2
5 6
7 8
end of data
.
let m3 = matrix combine columns m1 m2
.
set write decimals 0
print m3
    

The following output is generated.

 
        MATRIX M3      --            2 ROWS
                       --            4 COLUMNS

 VARIABLES--M31            M32            M33            M34     

          1              2              5              6
          3              4              7              8