Texas Instruments TI-89 User Manual - Page 892
TwoVar, Unarchiv, unitV, Unlock, you would a variable in RAM. However,
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TwoVar MATH/Statistics menu TwoVar list1, list2[, [list3] [, list4, list5]] {0,1,2,3,4,5,6}! L1 ¸ Calculates the TwoVar statistics and updates all the system statistics variables. {0,2,3,4,3,4,6}! L2 ¸ All the lists must have equal dimensions except for list5. list1 represents xlist. list2 represents ylist. list3 represents frequency. list4 represents category codes. list5 represents category include list. TwoVar L1,L2 ¸ ShowStat ¸ Note: list1 through list4 must be a variable name or c1-c99 (columns in the last data variable shown in the Data/Matrix Editor). list5 does not have to be a variable name and cannot be c1-c99 . {0 1 2 ...} {0 2 3 ...} Done Unarchiv CATALOG Unarchiv var1 [, var2] [, var3] ... 10!arctest ¸ 10 Moves the specified variables from the user data archive memory to RAM. Archive arctest ¸ 5ùarctest ¸ 15!arctest ¸ Done 50 You can access an archived variable the same as you would a variable in RAM. However, you cannot delete, rename, or store to an archived variable because it is locked automatically. To archive variables, use Archive. N Unarchiv arctest ¸ 15!arctest ¸ Done 15 unitV( ) MATH/Matrix/Vector ops menu unitV(vector1) ⇒ vector Returns either a row- or column-unit vector, depending on the form of vector1. vector1 must be either a single-row matrix or a single-column matrix. unitV([a,b,c]) ¸ [ a añ +bñ +cñ b añ +bñ +cñ añ c +bñ +cñ ] unitV([1,2,1]) ¸ [‡66 ‡6 3 ‡66] unitV([1;2;3]) ¸ ‡14 14 ‡14 3ø71‡414 Unlock CATALOG Unlock var1[, var2][, var3]... Unlocks the specified variables. Note: The variables can be locked using the Lock command. 892 Appendix A: Functions and Instructions