Room Calculated Attributes

Define calculations

Using the Calculated Attributes feature, you can build formulas dynamically using available dRofus fields to create additional fields. Calculated Attributes are available for Rooms, Items, Occurrences, and Products and allow you to build simple to very complex results. We explain how to do this for Room Calculated Attributes, Items Calculated Attributes, and Occurrence Calculated Attributes. The Calculated Attribute Formats are the same across dRofus. A good baseline understanding of how Item Composite Text Attributes work is a great place to start since the rules can be combined with these attributes.

You need admin access to the database to create composite text attributes, as the setup is done in the Administration settings. Please refer to Project and Database Administration.

Room Subtraction Example

By taking the existing field Programmed Area and subtracting from it Designed Area, we can understand if a room is under-designed or over-designed.

We can leverage the current properties grouping names so the team; understands that they are related.

We defined our new field Delta and located it within the Areas and Measurements group.

If the Programmed Area were smaller than the Designed Area, we would expect the Delta to be negative.

Most calculated attributes are designed around numbers, and our default formulas create a bracket around the field {0} when building out a formula. But sometimes, we like to use text, yes/no, or list values. For example, when checking whether two text fields match or both values are True. For these formulas to work, you need to add a single quote around the bracket ‘{0}’ so that we know it should be a string, not a number.

Several formats are available, and there is no limit to how complex you might want to go in combination.

Format	Summary	Example
+	Returns the sum of two numeric operands. (Addition)	{0} + {1} ~ 0:1, 1:4 = 5
-	Returns the difference of two numeric operands. (Subtraction)	{0} - 4 ~ 0:10 = 6
*	Returns the product of two numeric operands. (Multiplication)	{0} * {1} ~ 0:2, 1:3 = 6
/	Returns the quotient of two numeric operands. (Division)	if ( {1} = 0, 0, {0} / {1} ) ~ 0:9, 1:3 = 3 Note: You need the IF part to avoid dividing by zero.
and	Indicates whether both operands are true.	{0} < 10 and {0} > 0 ~ 0:5 = True
or	Indicates whether either or both operands are true.	{0} < 2 or {0} >5 ~ 0:8 = True
not	Returns true if the logical operand is false.	not ({0} < 0) ~ 0:-5 = False
=	Indicates whether the left operand is equal to the right operand.	{0} = 4 ~ 0:4 = True
!=	Indicates whether the left operand is not equal to the right operand.	{0} != {1} ~ 0:2, 1:4 = True
<	Indicates whether the left operand is less than the right operand.	{0} < 0 ~ 0:2 = False
<=	Indicates whether the left operand is less than or equal to the right operand.	{0} <=2 ~ 0:2 = True
>	Indicates whether the left operand is greater than the right operand.	{0} > 0 ~ 0:8 = True
>=	Indicates whether the left operand is greater than or equal to the right operand.	{0} >= 5 ~ 0:10 = True
if	Returns a value based on a condition	if ( {0} % {1} = 0, ‘Yes’, ‘No’ ) ~ 0:4, 1:2 = Yes
in	Returns whether an element is in a list of values.	in ( {0}, {1}, {2}, {3} ) ~ 0:7, 1:4, 2:7, 3:9 = True In the example above, the first declared argument '{0}' is the value you want to evaluate, in this example, the number '7' as defined by the '0:7' after the (~). The remaining arguments '{1},{2},{3}' define the list that {0} will be evaluated against. In this case, the values are 4, 7, 9, since our initial value is '7' the function will return 'True' since 7 is included in the list we are evaluating against.
isNull	Returns true if the operand is null.	isNull ( {0} ) ~ 0: = True
substring	Returns a slice of the provided text. The slice is decided by a start position and optional end position, starting from 0.	substring ( {0, 7) ~ 0:Doctor Rofus = Rofus substring ( {0}, 0, 6) ~ 0:Doctor Rofus = Doctor
contains	Returns true if the first text operand contains the second text operand.	contains ( {0}, {1} ) ~ 0:abc, 1:a = True
length	Returns the number of characters in the text.	length ( {0} ) ~ 0:Hello = 5
replace	Replaces a substring in the first text operand. All matches of the second text operand are replaced with the third text operand.	replace ( {0}, {1}, {2} ) ~ 0:Hello, 1:l, 2:xx = Hexxo
startsWith	Returns true if the first text operand starts with the second text operand.	startsWith ( {0}, {1} ) ~ 0:Hello, 1:H = True
endsWith	Returns true if the first text operand ends with the second text operand.	endsWith ( {0}, {1} ) ~ 0:Hello, 1:o = True
regexIsMatch	Returns true if the first text operand contains a match using the second text operand as a regular expression.	regexIsMatch ( {0}, ‘a.*’ ) ~ 0:abc = True
regexReplace	Replaces a substring in the first text operand. All matches found using the second text operand as regular expression are replaced with the third text operand.	regexReplace ( {0}, ‘l+’, 'X' ) ~ 0:Hello = HeXo
regexGroup	Returns the value of a regular expression group. Group index starts from 1 and defaults to 1 if not given.	regexGroup ( {0}, ‘(1+)’ ) ~ 0:Hello = ll regexGroup ( {0}, ‘(\\w+)\\s+car') ~ 0:One car red car blue car = One regexGroup ( {0}, ‘\\w+\\s+(car')) ~ 0:One car red car blue car = car
Round	Rounds a value to the nearest integer or specified number of decimal places.	Round ( {0}, 2) ~ 0:3.1415 = 3.14
Floor	Returns the largest integer less than or equal to the specified number.	Floor ( {0} ) ~ 0:1.5 = 1
Ceiling	Returns the smallest integer greater than or equal to the specified number.	Ceiling ( {0} ) ~ 0:1.5 = 2
Truncate	Calculates the integral part of a number.	Truncate ( {0} ) ~ 0:3.14 = 3
Abs	Returns the absolute value of a specified number.	Abs ( {0} ) ~ 0:-1 = 1
Min	Returns the smaller of two numbers.	Min ( {0}, {1} ) ~ 0:-4, 1:23 = -4
Max	Returns the larger of two numbers.	Max ( {0}, {1} ) ~ 0:5, 1:8 = 8
Sqrt	Returns the square root of a specified number.	Sqrt ( {0} ) ~ 0:4 = 2
Pow	Returns a specified number raised to the specified power.	Pow ( {0}, 2) ~ 0:3 = 9
Exp	Returns e raised to the specified power	Exp ( {0} ) ~ 0:0 = 1
Log	Returns the logarithm of a specified number.	Log ( {0}, 10) ~ 0:1 = 0
Log10	Returns the base 10 logarithm of a specified number.	Log10 ( {0} ) ~ 0:1 = 0
Sign	Returns a value indicating the sign of a number.	Sign ( {0} ) ~ 0:-10 = -1
Sin	Returns the sine of the specified angle.	Sin ( {0} ) ~ 0:0 = 0
Cos	Returns the cosine of the specified angle.	Cos ( {0} ) ~ 0:0 = 1
Tan	Returns the tangent fo the specified angle.	Tan ( {0} ) ~ 0:0 = 0
Asin	Returns the angle whose sine is the specified number.	Asin ( {0} ) ~ 0:0 = 0
Acos	Returns the angle whose cosine is the specified number.	Acos ( {0} ) ~ 0:1 = 0
Atan	Returns the angle whose tangent is the specified number.	Atan ( {0} ) ~ 0:0 = 0

Explore Items Calculated Attributes to see how this can be done with Items.