Calculated question : adding new math functions

The calculated question type could benefit of the EvalMath module to increase the math functions useable in the Calculated, Simple calculated et Multiple choice calculated question types.

Available functions

Calculated questions can use more than simple arithmetic operators. The following functions are allowed in versions 1.5 and newer. In the following table

 # means that the function exists, if it exists in EvalMath then it should exist in 2,9. 
 new means that the function needs to be created in EvalMath. 
  OK  will be used in test column to confirm that this property is set to 2.9

Function	1,5+	Eval Math	2.9	tested	Explanation
abs	#	#	#		Absolute value
acos	#	#	#		Arc cosine -- output in radians.
acosh	#	#	#		Inverse hyperbolic cosine -- output in radians.
asin	#	#	#		Arc sine -- output in radians.
asinh	#	#	#		Inverse hyperbolic sine.-- output in radians.
atan2	#				Arc tangent of two variables -- pass in two values like (y, x), and you'll get the atan(y/x), adjusted to the proper quadrant. (Note: The variables are in the reverse order to atan2(x,y) in Excel) Output is radians.
atan	#	#	#		Arc tangent -- output in radians.
atanh	#	#	#		Inverse hyperbolic tangent-- output in radians.
bindec	#				Binary to decimal
ceil	#	#	#		Round fractions up
cos	#	#	#		Cosine -- in radians!!! Convert your degree measurement to radians before you take the cos of it.
cosh	#	#	#		Hyperbolic cosine -- in radians!!! Convert your degree measurement to radians before you take the cosh of it.
decbin	#				Decimal to binary
decoct	#	new			Decimal to octal
deg2rad	#	new			Converts the number in degrees to the radian equivalent
exp	#	#	#		Calculates the exponent of e
expm1		new			Returns exp(number) - 1, computed in a way that is accurate even when the value of number is close to zero
floor	#	#	#		Round fractions down
fmod	new				Returns the floating-point modulus of two numbers - i.e. the remainder when the first is divided by the second.
is_finite	#	new			Finds whether a value is a legal finite number
is_infinite	#	??			Finds whether a value is infinite
is_nan	#	??			Finds whether a value is not a number
log10	#	new			Base-10 logarithm
log1p	#	new			Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero
log	#	#	#		Natural logarithm (ln)	#	#	#
max	#	#	#		Find highest value
min	#	#	#		Find lowest value
octdec	#	new			Octal to decimal
pi()	#	#	#		Get value of pi - the function does not take an argument, like in Excel.
pow (numberToRaise, NumberRaisedTo)	#	new			power (numberToRaise, NumberRaisedTo)		#	new		Exponential expression
rad2deg	#				Converts the radian number to the equivalent number in degrees
rand	#	new			Generate a random integer
rand_int		#	new		Generate a random integer
rand_float		#	new		Generate a random float
round	#	#	#		Rounds a float
sin	#	#	#		Sine -- in radians!!! Convert your degree measurement to radians before you take the sin of it.
sinh	#	#	#		Hyperbolic sine -- in radians!!! Convert your degree measurement to radians before you take the sinh of it.
sqrt	#	#	#		Square root
tan	#	#	#		Tangent -- in radians!!! Convert your degree measurement to radians before you take the tan of it.
tanh	#	#	#		Hyperbolic tangent -- in radians!!! Convert your degree measurement to radians before you take the tanh of it.

to be completed --Pierre Pichet (talk) 12:12, 12 December 2014 (AWST)