Use the File > TI Handheld > Export to command to export the contents of a Derive worksheet or dmo file to a text variable on a TI CAS handheld (currently the TI-89, TI-89 Titanium, TI-92+, or TI Voyage 200).  In order to use this command, the operating system on the TI handheld must be version 2.09 or higher and the TI Connectivity Kit needs to be installed and properly configured on your computer.  This enables your computer to communicate with the TI handheld using the TI Connect(tm) software and a TI-GRAPH LINK(tm) cable.  For more information, visit the TI Connectivity Kit Product Center!JumpHtml(`http://education.ti.com/us/product/accessory/connectivity/features/features.html') web site.


Click on one of the following buttons to determine the source of the exported data:

•        Selected to export only the selected mathematical expressions and text in the active Derive worksheet to the TI handheld.

•        All to export all the mathematical expressions and text in the active Derive worksheet to the TI handheld.

•        DMO File to export mathematical expressions and text from a Derive dmo file of your choosing.


If Unsimplified Expressions Only is checked, mathematical expressions in the active worksheet that are the result of simplifying another expression are not exported to the TI handheld.


In the Text Variable (file) field of the command's dialog box, enter the name of a text variable in the current folder on the TI handheld to receive the exported data.  To export to a text variable in another folder on the TI handheld, specify its full pathname (that is, folderName\variableName). Note that only text variable files can be exported from Derive.


Derive expressions result in text variable lines prefixed by the C command prefix.  Derive text boxes result in text variable lines with no prefix.  You can send all of a worksheet or just the portion that is highlighted to a text variable on the TI handheld.

 

As explained in the TI handheld documentation, you can view the resulting text variable by using the Text Editor application.  Within the value of a text variable, lines preceded by the C: prefix are command lines.  When [F4]Execute is pressed with the cursor on a command line, the line and its simplified result appear on the Home screen.  The [Mode] Split Screen TOP-BOTTOM or LEFT-RIGHT is particularly useful for stepping through such command lines.


When exporting expressions, many but not all Derive function names, keywords and operators are translated from any case in Derive into their standard case handheld counterparts.  For example, ASIN, aSin and asin in Derive all translate to the arcsine function on the TI handheld.


Beware that some functions translate into alternative counterparts depending on whether the arguments are scalars, one-dimensional vectors or matrices.  This type information can not be determined by the translator unless the argument actually begins with ‘[‘ or ‘[[‘.  For example, ABS([…]) translates to norm({­…}), whereas ABS(z) translates to abs(z) even if z is a variable to which a list or matrix has been assigned.  Therefore, it is best to supply manifest list or matrix values when intended and available.


Note also that translated functions are not always exactly equivalent in behavior.  For example, on TI handhelds approximate arithmetic is always 14 significant digits, so APPROX (u) and APPROX(u,n) both translate to approx(u). 


Built-in Derive functions that have no counterpart on TI handhelds generate a warning message in the form of a text-line.  User-defined functions and utility library functions that have no counterpart on TI handhelds also generate a warning message, unless they are defined in the same transmission before they are called.  They can be defined as arbitrary functions by assignments of the form

f(x) :=

where f is the name of the function.  Note that built-in Derive functions cannot be redefined.


On TI handhelds variable names and function names are limited to a maximum of eight characters.  Any such name that is not translated into a handheld counterpart will cause a syntax error when executed from the text-variable command line.


Before exporting to a TI handheld from a Derive file that was generated using an external editor, it is best to load the file into Derive to ensure that there are no syntax errors.  Very little syntax checking is done during the translation, and none is done by the TI handheld until the command lines therein are executed.


To ensure that the expressions have the desired effect, it is also wise to try simplifying them before exporting them even if you only intend to export the unsimplified expressions.

  

When exporting text, the only translation is between the different character sets used by Derive and the TI handheld, preserving case.  Not all of the displayable Derive characters have displayable counterparts on the handheld.  Characters with no counterparts are simply displayed as an upside-down question mark.


However, a single-line Derive text box that begins with C: generates a command on the TI handheld instead of a text line.  This is useful for exporting commands to the TI handheld that have no counterpart in Derive, such as the Graph command.


The Online Interconnectivity Dictionary!JumpHtml(`http://www.derive-europe.com/downloads.asp?dictionary') includes a list of the Derive commands, functions and operators that can be exported to TI handhelds.


Other Algebra Window File commandsAlgebra_Window_File_commands 

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