# Difference between revisions of "Grade calculations"

*Note: You are currently viewing documentation for Moodle 2.2. Up-to-date documentation for the latest stable version is available here: Grade calculations.*

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# Click on ''Grades'' in the Administration block. | # Click on ''Grades'' in the Administration block. | ||

# Click the "Turn Editing On" button on the top right corner. | # Click the "Turn Editing On" button on the top right corner. | ||

− | # Click the "Show Calculations" icon on the middle top. | + | # Click the "Show Calculations" icon on the middle top. |

− | # Click the little calculator symbol under Course Total column. | + | # Click the little calculator symbol under Course Total column which will bring you to the calculations page. |

+ | [[Image:Calc.JPG|thumb|center|"Show Calculations" Icon]][[Image:Calc_icon.JPG|thumb|center|Little Calculator Symbol]] | ||

+ | |||

+ | ==Assigning ID Numbers== | ||

+ | ID numbers are similar to nicknames for each grade item. In a calculation, instead of referring back to a whole assignment name, we can substitute it for it's ID number which becomes a lot easier. Think of it as substituting 143 as X and then using X for various math problems. | ||

+ | |||

+ | ID numbers on the bottom of the page. Use simple to remember numbers or variables like 1, X, or Quiz1. Remember to click "Add id numbers"! | ||

+ | |||

+ | ==Understanding Calculation Functions== | ||

+ | Click the yellow question mark next to the word "Calculation". This will bring a pop-up explaining the various functions that can be used in calculations and how to use them. | ||

+ | |||

+ | Every calculation must start with an equal sign (=). Following is a list of the functions supported by the calculation. The comma (,) character is used to separate arguments within function brackets. The comma can also be used to separate different functions. | ||

+ | |||

+ | * average<nowiki>([[item1]], [[item2]]...)</nowiki>: Returns the average of a sample | ||

+ | * max<nowiki>([[item1]], [[item2]]...)</nowiki>: Returns the maximum value in a list of arguments | ||

+ | * min<nowiki>([[item1]], [[item2]]...):</nowiki> Returns the minimum value in a list of arguments | ||

+ | * mod(dividend, divisor): Calculates the remainder of a division | ||

+ | * pi(): Returns the value of the number Pi | ||

+ | * power(base, power): Raises a number to the power of another | ||

+ | * round(number, count): Rounds a number to a predefined accuracy | ||

+ | * sum(<nowiki>[[item1]], [[item2]]...)</nowiki>: Returns the sum of all arguments | ||

+ | |||

+ | A number of mathematical functions is also supported: | ||

+ | |||

+ | * sin | ||

+ | * sinh | ||

+ | * arcsin | ||

+ | * asin | ||

+ | * arcsinh | ||

+ | * asinh | ||

+ | * cos | ||

+ | * cosh | ||

+ | * arccos | ||

+ | * acos | ||

+ | * arccosh | ||

+ | * acosh | ||

+ | * tan | ||

+ | * tanh | ||

+ | * arctan | ||

+ | * atan | ||

+ | * arctanh | ||

+ | * atanh | ||

+ | * sqrt | ||

+ | * abs | ||

+ | * ln | ||

+ | * log | ||

+ | * exp | ||

+ | |||

+ | ==Making your Calculation== | ||

+ | Back on the calculations page, start typing the various functions and the ID numbers chosen for your calculation. | ||

+ | |||

+ | # Start with an equal sign (=) | ||

+ | # Choose a function; Example: =sum() | ||

+ | # Plug in your ID numbers enclosed in 2 hard brackets; Example: <nowiki>=sum([[item1]][[item2]][[item3]])</nowiki> | ||

+ | # Separate each ID number with a comma; Example: <nowiki>=sum([[item1]],[[item2]],[[item3]])</nowiki> | ||

+ | # Click the "Save Changes" button. | ||

+ | |||

+ | |||

+ | [[Image:Final_calc.JPG|center|Final example calculation]] | ||

==See also== | ==See also== | ||

*[http://www.youtube.com/watch?v=WKUGyzAXcyA Video on how to set up calculations in the gradebook (basic)] | *[http://www.youtube.com/watch?v=WKUGyzAXcyA Video on how to set up calculations in the gradebook (basic)] | ||

*[http://www.youtube.com/watch?v=VBEj8mmu8lM Video on how to set up calculations in the gradebook (advanced)] | *[http://www.youtube.com/watch?v=VBEj8mmu8lM Video on how to set up calculations in the gradebook (advanced)] |

## Revision as of 07:43, 20 January 2008

## Contents

## Enabling Calculations

To enable calculations for you gradebook:

- Login as teacher or other user with permission to edit grades.
- Go to course.
- Click on
*Grades*in the Administration block. - Click the "Turn Editing On" button on the top right corner.
- Click the "Show Calculations" icon on the middle top.
- Click the little calculator symbol under Course Total column which will bring you to the calculations page.

## Assigning ID Numbers

ID numbers are similar to nicknames for each grade item. In a calculation, instead of referring back to a whole assignment name, we can substitute it for it's ID number which becomes a lot easier. Think of it as substituting 143 as X and then using X for various math problems.

ID numbers on the bottom of the page. Use simple to remember numbers or variables like 1, X, or Quiz1. Remember to click "Add id numbers"!

## Understanding Calculation Functions

Click the yellow question mark next to the word "Calculation". This will bring a pop-up explaining the various functions that can be used in calculations and how to use them.

Every calculation must start with an equal sign (=). Following is a list of the functions supported by the calculation. The comma (,) character is used to separate arguments within function brackets. The comma can also be used to separate different functions.

- average([[item1]], [[item2]]...): Returns the average of a sample
- max([[item1]], [[item2]]...): Returns the maximum value in a list of arguments
- min([[item1]], [[item2]]...): Returns the minimum value in a list of arguments
- mod(dividend, divisor): Calculates the remainder of a division
- pi(): Returns the value of the number Pi
- power(base, power): Raises a number to the power of another
- round(number, count): Rounds a number to a predefined accuracy
- sum([[item1]], [[item2]]...): Returns the sum of all arguments

A number of mathematical functions is also supported:

- sin
- sinh
- arcsin
- asin
- arcsinh
- asinh
- cos
- cosh
- arccos
- acos
- arccosh
- acosh
- tan
- tanh
- arctan
- atan
- arctanh
- atanh
- sqrt
- abs
- ln
- log
- exp

## Making your Calculation

Back on the calculations page, start typing the various functions and the ID numbers chosen for your calculation.

- Start with an equal sign (=)
- Choose a function; Example: =sum()
- Plug in your ID numbers enclosed in 2 hard brackets; Example: =sum([[item1]][[item2]][[item3]])
- Separate each ID number with a comma; Example: =sum([[item1]],[[item2]],[[item3]])
- Click the "Save Changes" button.