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u  Deleting Matrices
  You can delete either a specific matrix or all matrices in memory.
u To delete a specific matrix
  1. While the Matrix Editor is on the display, use  f and  c to highlight the matrix you want to 
delete.
  2. Press  1(DELETE).
  3. Press  1(Yes) to delete the matrix or  6(No) to abort the operation without deleting 
anything.
u To delete all matrices
  1.  While the Matrix Editor is on the display, press  2(DEL-ALL).
  2.  Press  1(Yes) to delete all matrices in memory or  6(No) to abort the operation without 
deleting anything.
k Matrix Cell Operations
  Use the following procedure to prepare a matrix for cell operations.
  1.  While the Matrix Editor is on the display, use  f and  c to highlight the name of the matrix 
you want to use.
You can jump to a specific matrix by inputting the letter that corresponds to the matrix name. 
Inputting  ai(N), for example, jumps to Mat N.
Pressing  !-(Ans) jumps to the matrix current memory.
  2.  Press  w and the function menu with the following items appears.
  • { ROW-OP } ... {row operation menu}
  • { ROW }
       • { DELETE } / { INSERT } / { ADD } ... row {delete}/{insert}/{add}
  • { COLUMN }
       • { DELETE } / { INSERT } / { ADD } ... column {delete}/{insert}/{add}
  • { EDIT } ... {cell editing screen}
  All of the following examples use Matrix A.