Calculated question : adding new math functions: Difference between revisions
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In the following table | In the following table | ||
# means that the function exists, if it exists in EvalMath then it should exist in 2,9. | # 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. | new means that the function needs to be created in EvalMath or only in Calculated questiontype.. | ||
OK will be used in test column to confirm that this property is set to 2.9 | OK will be used in test column to confirm that this property is set to 2.9 | ||
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|Natural logarithm (''ln'') | |Natural logarithm (''ln'') | ||
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Revision as of 16:28, 12 December 2014
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 or only in Calculated questiontype.. 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)