dayOfWk(year,month,day)

Returns an integer from 1 to 7, with each integer representing a day of the week. Use dayOfWk( to determine on which day of the week a particular date would occur. The year must be 4 digits; month and day can be 1 or 2 digits.

dbd(date1,date2)

Calculates the number of days between date1 and date2 using the actual-day-count method.

DEC

Displays answers as integers or decimal numbers.

value4Dec

Displays a real or complex number, expression, list, or matrix in decimal format.

Degree

Sets degree angle mode.

DelVar variable

Deletes from memory the contents of variable.

DependAsk

Sets table to ask for dependent-variable values.

DependAuto

Sets table to generate dependent-variable values automatically.

det(matrix)

Returns determinant of matrix.

DetectAsymOff

Turns off checks for rational function asymptotes when graphing. Impacts graph speed. Does not perform extra calculations to detect asymptotes pixel to pixel while graphing. Pixels will connect across the screen even across an asymptote.

DetectAsymOn

Turns on checks for rational function asymptotes when graphing. Impacts graph speed. Performs more calculations and will not connect pixels across an asymptote on a graph.

DiagnosticOff

Sets diagnostics-off mode; r, r2, and R2 are not displayed as regression model results.

DiagnosticOn

Sets diagnostics-on mode; r, r2, and R2 are displayed as regression model results.

dim(listname)

Returns the dimension of listname.

dim(matrixname)

Returns the dimension of matrixname as a list.

length!dim(listname)

Assigns a new dimension (length) to a new or existing listname.

{rows,columns}!dim(matrixname)

Assigns new dimensions to a new or existing matrixname.

Disp

Displays the home screen.

Disp [valueA,valueB,valueC,...,value n]

Displays each value.

DispGraph

Displays the graph.

DispTable

Displays the table.

value4DMS

Displays value in DMS format.

Dot-Thick

Sets dot plotting mode; resets all Y=editor graph-style settings to Dot-Thick.

Dot-Thin

Sets dot plotting mode; resets all Y=editor graph-style settings to Dot-Thin.

DrawFexpression[,color#]

Draws expression (in terms of X) on the graph with specified

Color#:10 - 24 or color name pasted from [vars] COLOR.

DrawInvexpression[,color#]

Draws the inverse of expression by plotting X values on the y-axis and Y values on the x-axis with specified

Color#: 10 - 24 or color name pasted from [vars] COLOR.

DS<(variable,value):commandA:commands

Decrements variable by 1; skips commandA if variable < value.