User`s guide

Submatrix
5-425
•Last
For rows, this specifies that the last row of u should be used as the last row
of
y. If 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. If all rows are to be included, this is equivalent to
y(:,end) = u(:,N).
•
Offset from middle
For rows, this specifies that the row of u offset from row M/2 by the Ending
row offset
parameter, lastrow, should be used as the last row of y. If all
columns are to be included, this is equivalent to
y(end,:) = u(M/2-lastrow,:).
For columns, this specifies that the column of
u offset from column N/2 by the
Ending column offset parameter, lastcol, should be used as the last
column of
y. If all rows are to be included, this is equivalent to
y(:,end) = u(:,N/2-lastcol).
•
Middle
For rows, this specifies that the middle row of u should be used as the last
row of
y. If all columns are to be included, this is equivalent to
y(end,:) = u(M/2,:).
For columns, this specifies that the middle column of
u should be used as the
last column of
y. If all rows are to be included, this is equivalent to
y(:,end) = u(:,N/2).
Example To extract the lower-right 3-by-2 submatrix from a 5-by-7 input matrix, enter
the following set of parameters:
•
Row span = Range of rows
•Starting row = Index
•Starting row index = 3
•Ending row = Last
•Column span = Range of columns
•Starting column = Offset from last
•Starting column offset = 1
•Ending column = Last