Formula Question: Support additional php math functions

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1 Initial Problem

Currently only a limited number of php math functions are usable in the formula of a result. Lecturers miss rounding functions within the formula.

You may enter predefined variables ($v1 to $vn), defined results (e.g. $r1), braces for expressions, mathematical operators + (addition), - (subtraction), * (multiplication), / (division), ^ (nth power), the constants ‘pi’ for pi and ‘e’ for euler's constant, as well as the functions ‘sin’, ‘sinh’, ‘arcsin’, ‘asin’, ‘arcsinh’, ‘asinh’, ‘cos’, ‘cosh’, ‘arccos’, ‘acos’, ‘arccosh’, ‘acosh’, ‘tan’, ‘tanh’, ‘arctan’, ‘atan’, ‘arctanh’, ‘atanh’, ‘sqrt’, ‘abs’, ‘ln’ and ‘log’.

2 Conceptual Summary

The following functions should also be available:

• ceil — Round fractions up
• floor — Round fractions down
• round — Rounds a float

3 User Interface Modifications

3.1 List of Affected Views

• Formula question create/edit screen

3.2 User Interface Details

Helptext needs to be extended.

3.3 New User Interface Concepts

{If the proposal introduces any completely new user interface elements, you might consult UI Kitchen Sink in order to find the necessary information to propose new UI-Concepts. Note that any maintainer might gladly assist you with this.}

4 Technical Information

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5 Privacy Information

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6 Security Implications

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7 Contact

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• Maintainer: {Please add your name before applying for an initial workshop or a Jour Fixe meeting.}
• Implementation of the feature is done by: {The maintainer must add the name of the implementing developer.}

8 Funding

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9 Discussion

10 Implementation

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Test Cases

Test cases completed at {date} by {user}

• {Test case number linked to Testrail} : {test case title}

Approval

Approved at {date} by {user}.