L_ONES and L_ZEROS

=L_ONES(array) :: Returns a matrix of 1s the size of array
=L_ONES(m,[n]) :: Returns a matrix of 1s the size of m x n (default n=1)
=L_ZEROS(array) :: Returns a matrix of 0s the size of array
=L_ZEROS(m,[n]) :: Returns a matrix of 0s the size of m x n (default n=1)

Description

Although matrices of 1s and 0s are very easy to create with the SEQUENCE function, the L_ONES and L_ZEROS functions are included in the LAMBDA library because of how commonly they are used when working with matrices.

L_ONES(array)  =SEQUENCE( ROWS(array), COLUMNS(array), 1, 0 )
L_ZEROS(array) =SEQUENCE( ROWS(array), COLUMNS(array), 0, 0 )
L_ONES(n,m)  =SEQUENCE( n, m, 1, 0 )
L_ZEROS(n,m) =SEQUENCE( n, m, 0, 0 )

Lambda Function Code

This code for using L_ONES and L_ZEROS in Excel is provided under the License as part of the LAMBDA Library, but to use just this function, you may copy the following code directly into your spreadsheet.

Name: L_ONES
Comment: Create a matrix of 1s that is the same size as the array or size m x n.
Refers To:

=LAMBDA(m_rows,[n_columns],
LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(m_rows),cols,COLUMNS(m_rows),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,1,0),
        IF(ISOMITTED(n_columns),
            SEQUENCE(m_rows,1,1,0),
            SEQUENCE(m_rows,n_columns,1,0)
        )
    )
))

Name: L_ZEROS
Comment: Create a matrix of 0s that is the same size as the array or size m x n.
Refers To:

=LAMBDA(m_rows,[n_columns],
LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(m_rows),cols,COLUMNS(m_rows),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,0,0),
        IF(ISOMITTED(n_columns),
            SEQUENCE(m_rows,1,0,0),
            SEQUENCE(m_rows,n_columns,0,0)
        )
    )
))

/**
* L_ONES(array) :: Returns a matrix of 1s the size of array
* L_ONES(m,[n]) :: Returns a matrix of 1s the size of m x n (default n=1)
*/
L_ONES = LAMBDA(m_rows,[n_columns],
LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(m_rows),cols,COLUMNS(m_rows),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,1,0),
        IF(ISOMITTED(n_columns),
            SEQUENCE(m_rows,1,1,0),
            SEQUENCE(m_rows,n_columns,1,0)
        )
    )
));
/**
* L_ZEROS(array) :: Returns a matrix of 0s the size of array
* L_ZEROS(m,[n]) :: Returns a matrix of 0s the size of m x n (default n=1)
*/
L_ZEROS = LAMBDA(m_rows,[n_columns],
LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(m_rows),cols,COLUMNS(m_rows),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,0,0),
        IF(ISOMITTED(n_columns),
            SEQUENCE(m_rows,1,0,0),
            SEQUENCE(m_rows,n_columns,0,0)
        )
    )
));

Name: L_ONES
Description: L_ONES(array,) or L_ONES(n,m) - Create a matrix of 1s that is the same size as the array or size m x n.
Arguments: param1, param2
Function:

LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(param1),cols,COLUMNS(param1),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,1,0),
        IF(ISBLANK(param2),
            SEQUENCE(param1,1,1,0),
            SEQUENCE(param1,param2,1,0)
        )
    )
)

Name: L_ZEROS
Description: L_ZEROS(array,) or L_ZEROS(n,m) - Create a matrix of 0s that is the same size as the array or size m x n.
Arguments: param1, param2
Function:

LET(doc,"https://www.vertex42.com/lambda/ones-and-zeros.html",
    rows,ROWS(param1),cols,COLUMNS(param1),
    IF(OR(rows>1,cols>1),
        SEQUENCE(rows,cols,0,0),
        IF(ISBLANK(param2),
            SEQUENCE(param1,1,0,0),
            SEQUENCE(param1,param2,0,0)
        )
    )
)

L_ONES and L_ZEROS Examples

Test: Copy and Paste this LET function into a cell
=LET(
    array, A1:C4,
    L_ZEROS(array)
)

Result: {0, 0, 0; 0, 0, 0; 0, 0, 0; 0, 0, 0}

=SEQUENCE(4,3,0,0)

Test: Copy and Paste this LET function into a cell
=LET(
    m_rows, 2,
    n_columns, 4,
    L_ONES(m_rows,n_columns)
)

Result: {1, 1, 1, 1; 1, 1, 1, 1}

=SEQUENCE(2,4,1,0)