HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 192
SIZE(<list>) or SIZE(<matrix>), LIST(<list>), REVERSE(<list>), SORT({list})
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SIZE() or SIZE() This function returns the size of the list or matrix specified. Since normal users would probably know anyway, and could find out easily via the list catalog, this is clearly another of those functions which are of more use to programmers (who won't know when they write their program just how long the list you will ask it to deal with will be when you eventually run the program). If the object is a matrix then the return value is a two element list as {rows, columns}. ΣLIST() This function returns the sum of all the elements of a list. Eg. LIST({2,3,5}) would return a value of 10. REVERSE() This function reverses the order of elements in a list. Eg. REVERSE({2,4,1,7,10}) would return {10,7,1,4,2} SORT({list}) This function returns a list that is sorted into ascending order. If you want the list in descending order instead then use REVERSE(SORT({list})). See page 137 for an example of using SORT to assign rank orders to a list of values. 192
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