Using the Assistant Submenu

The [Assistant] submenu contains two commands related to the Assistant mode.

Note that the following commands are valid in the Assistant mode only. For more information on the Assistant mode see “Assistant Mode and Algebra Mode” on page 45.

uarrange [Action][Assistant][arrange]

Function: Collects like terms and arranges them in descending order, starting with the term that contains the smallest coefficient.

Syntax: arrange (Exp/Eq/Ineq/List/Mat [ ) ]

Example: To arrange 2x + 3 – 5x + 8y in the sequence of its variables

ureplace [Action][Assistant][replace]

Function: Replaces the variable in an expression, equation or inequality with the value assigned to a variable using the “store” command.

Syntax: replace (Exp/Eq/Ineq/List/Mat [ ) ]

Example: To replace s in the expression 3x + 2s, when the expression 2x + 1 is assigned to s

uinvert [Action][Transformation][invert]

Function: Inverts two variables in an expression.

Syntax: invert (Exp/Eq/Ineq/List [,variable-1, variable-2] [ ) ]

•x and y are inverted when variables are not specified. Example: To invert x and y in the expression 2x = y

uClear_a_z

Function: Clears all single-character variable names (a–z and A–Z) in the current folder.

Using the Distribution/Inv.Dist Submenu

The [Distribution/Inv.Dist] submenu includes functions related to each type of statistical calculation distribution probability. The functions on this submenu perform the same calculations as the Distribution commands that are available in the Statistics application and the Main, eActivity, and Program applications.

For information about the numeric expressions used in calculations, see “Distributions” on page 145.

For information about the meanings of the variables used in the syntaxes of the functions presented in this section, and the system variables that store the values obtained as calculation results, see “Input and Output Terms” on page 148.

Specifying Arguments within the Distribution Function

You can specify either values or list data for any of the arguments within the Distribution function. The normPDf function (page 83) syntax (normPDf(x, , )) that returns normal probability density can be used to perform the calculations shown below. The “Number Format” setting is “Fix 2” for all calculation results.

normPDf(1, 1, 0) = 0.24

normPDf({1, 2}, 1, 0) = {0.24, 0.05}

normPDf(1, {1, 2}, 0) = {0.24, 0.18}

normPDf({1, 2},{1, 2}, 0) = {0.24, 0.12}

normPDf({1, 2},{1, 2},{1, 0}) = {0.40, 0.12}

Chapter 2: Main Application

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