HP 39GS HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 195
The ‘Matrix’ group of functions, COLNORM(<matrix>), CROSS([vector], [vector])
UPC - 808736931328
View all HP 39GS manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 195 highlights
The 'Matrix' group of functions This group of functions is provided to deal with matrices. The scope of functions & abilities covered in this group is in fact vastly greater than would be required by the average high school student or teacher. In many cases supplying an explanation in more detail than the manual of what the function is used for would occupy many pages to no real useful gain. Consequently although some will include detailed examples, some of the functions will be covered only very briefly. Further examples are given in the chapter titled "Working with Matrices" on page 209. COLNORM() Finds the column norm of a matrix: the maximum, over all columns contained in the matrix, of the absolute values of the sum of the elements in each column. ⎡ 1 2 3⎤ Eg. For the matrix M1 = ⎢ ⎢ 4 5 6⎥⎥ , the column with the largest absolute sum of 13 is column 3. ⎢⎣−1 5 4⎥⎦ COND() Finds the condition number, the 1-norm (column norm), of a square matrix. CROSS([vector],[vector]) This function finds the cross product of two vectors. Vectors for this function are written as single row matrices. ⎛3⎞ For example, a = (3, 4, 0) or 4 0 would be written as [3,4,0]. Note: If you want to use the Matrix Catalog to define your matrices for use with this function then you must use the key to define them as real vectors rather than as matrices as the CROSS function is one of the few for which this matters. 195