HP 39gII - Matrices

54 Catalogs and Editors
Catalogs and Editors54
Matrices
Press SHIFT 4 (Matrix) to enter the Matrix Catalog. There are ten matrices available, named
M1-M9 and M0. The menu keys in this catalog are:
• EDIT: opens the Matrix Editor to edit the selected matrix
• DELETE: deletes the contents of a matrix
• VECT: changes a matrix into a vector
• SEND: sends a matrix to another HP 39gII
Press the EDIT menu key to start a new matrix or edit an existing one. You are now in the
Matrix Editor. While editing a matrix, the menu keys are:
• EDIT: opens an input box to edit the chosen cell
• INS: inserts either a row above the current row or a column to the left of the current
column
• DELETE: makes the current cell value zero
• GO: toggles between entering the matrix row by row or column by column
• BIG: toggles between the normal font and a larger one
• WIDTHn: toggles between displaying one, two, three, or four columns at a time
You do not have to define the dimensions of a matrix beforehand. Just start typing in values.
You can enter values row by row, or column by column; the GO menu key toggles through
the options.
As with lists, you can send them to another HP 39gII or receive them from another HP 39gII.
In programs or the Home view, you can reference M1 to perform operations on your matrix.