The block treats length-M unoriented vector input as an
M-by-1 matrix. The Row
span parameter provides three options for specifying the range of
rows in u to be retained in submatrix output
y:
All rows
Specifies that y contains all M rows
of u.
One row
Specifies that y contains only one row from
u. Selecting One row
enables the Row parameter to allow selection of the
desired row.
Range of rows
Specifies that y contains a range of rows from u.
Selecting Range of rows enables the
Starting row and Ending row
parameters to allow selection of the desired range of rows.
The Column span parameter contains a corresponding set of
three options for specifying the range of columns in u to be
retained in submatrix y: All columns,
One column, or Range of
columns. The One column option enables
the Column parameter, and Range of
columns options enable the Starting column
and Ending column parameters.
When you select One row or Range of
rows from the Row span parameter, you specify
the desired row or range of rows in the Row parameter, or the
Starting row and Ending row
parameters. Similarly, when you select One column or
Range of columns from the Column
span parameter, you specify the desired column or range of columns in
the Column parameter, or the Starting
column and Ending column parameters.
The Row, Column, Starting
row, or Starting column can be specified in six
ways:
First
For rows, this specifies that the first row of u should
be used as the first row of y. When all columns are to be
included, this is equivalent to y(1,:) = u(1,:).
For columns, this specifies that the first column of u
should be used as the first column of y. When all rows
are to be included, this is equivalent to y(:,1) =
u(:,1).
Index
For rows, this specifies that the row of u,
firstrow, forward-indexed by the Row index
parameter or the Starting row index
parameter, should be used as the first row of y. When all
columns are to be included, this is equivalent to y(1,:) =
u(firstrow,:).
For columns, this specifies that the column of u,
forward-indexed by the Column index parameter or the
Starting column index parameter,
firstcol, should be used as the first column of
y. When all rows are to be included, this is
equivalent to y(:,1) = u(:,firstcol).
Offset from last
For rows, this specifies that the row of u offset from
row M by the Row offset or
Starting row offset parameter,
firstrow, should be used as the first row of
y. When all columns are to be included, this is
equivalent to y(1,:) = u(M-firstrow,:).
For columns, this specifies that the column of u offset
from column N by the Column offset
or Starting column offset parameter,
firstcol, should be used as the first column of
y. When all rows are to be included, this is
equivalent to y(:,1) = u(:,N-firstcol).
Last
For rows, this specifies that the last row of u should
be used as the only row of y. When all columns are to be
included, this is equivalent to y = u(M,:).
For columns, this specifies that the last column of u
should be used as the only column of y. When all rows are
to be included, this is equivalent to y = u(:,N).
Offset from middle
When you select this option, the block selects the first row or column of the output
y by adding the specified offset to the middle row or
column of the input u. When the number,
X, of input rows or columns is even, the block
defines the middle as X/2 +1. When the number of input rows or columns is odd, the
block defines the middle as ceil(X/2).
When all columns are to be included, the following code defines the
starting row: y(1,:) = u(MiddleRow+Offset,:), where
Offset is the value of the Row
offset or Starting row offset parameter.
When all rows are to be included, the following code defines the starting
column: y(1,:) = u(:,MiddleColumn+Offset), where
Offset is the value of the Column offset
or Starting column offset parameter.
Middle
When you select this option, the block uses the middle row or column of the input
u as the first row or column of the output
y. When the number, X, of input
rows or columns is even, the block defines the middle as X/2 +1. When the number of input rows or columns is odd, the
block defines the middle as ceil(X/2).
When all columns are to be included, the following code defines the
starting row: y = u(MiddleRow,:). When all rows are to be
included, the following code defines the starting column: y =
u(:,MiddleColumn).
The Ending row or Ending column can
similarly be specified in five ways:
Index
For rows, this specifies that the row of u
forward-indexed by the Ending row index parameter,
lastrow, should be used as the last row of
y. When all columns are to be included, this is
equivalent to y(end,:) = u(lastrow,:).
For columns, this specifies that the column of u
forward-indexed by the Ending column index parameter,
lastcol, should be used as the last column of
y. When all rows are to be included, this is
equivalent to y(:,end) = u(:,lastcol).
Offset from last
For rows, this specifies that the row of u offset from
row M by the Ending row offset
parameter, lastrow, should be used as the last row of
y. When all columns are to be included, this is
equivalent to y(end,:) = u(M-lastrow,:).
For columns, this specifies that the column of u offset
from column N by the Ending column
offset parameter, lastcol, should be used
as the last column of y. When all rows are to be
included, this is equivalent to y(:,end) =
u(:,N-lastcol).
Last
For rows, this specifies that the last row of u should
be used as the last row of y. When all columns are to be
included, this is equivalent to y(end,:) = u(M,:).
For columns, this specifies that the last column of u
should be used as the last column of y. When all rows are
to be included, this is equivalent to y(:,end) =
u(:,N).
Offset from middle
When you select this option, the block selects the last row or column of the output
y by adding the specified offset to the middle row or
column of the input u. When the number,
X, of input rows or columns is even, the block
defines the middle as X/2 +1. When the number of input rows or columns is odd, the
block defines the middle as ceil(X/2).
When all columns are to be included, the following code defines the ending
row: y(end,:) = u(MiddleRow+Offset,:), where
Offset is the value of the Ending row
offset parameter. When all rows are to be included, the
following code defines the ending column: y(:,end) =
u(:,MiddleColumn+Offset), where Offset is
the value of the Ending column offset parameter.
Middle
When you select this option, the block uses the middle row or column of the input
u as the last row or column of the output
y. When the number, X, of input
rows or columns is even, the block defines the middle as X/2 +1. When the number of input rows or columns is odd, the
block defines the middle as ceil(X/2).
When all columns are to be included, the following code defines the ending
row: y(end,:) = u(MiddleRow,:). When all rows are to be
included, the following code defines the ending column: y(:,end) =
u(:,MiddleColumn).
