34/Cálculos de calificación

De MoodleDocs


Un cálculo de calificación es una fórmula usada para determinar calificaciones, basada (opcionalmente) en otros ítems de calificación. Tome nota de que esto no es lo mismo que los tipos de pregunta calculada.

Los cálculos para el libro de calificaciones siguen el patrón de fórmulas/funciones en programas de hoja-de-cálculo populares. Empiezan con un signo igual (=), y usan operadores y funciones matemáticas comunes para producir una salida numérica única. Esta salida es después usada como el valor computado para el ítem de calificación que Usted está editando.

Configurando un cálculo de calificación

Calculator symbol
Example calculation

To set a grade calculation:

  1. Login as teacher or other user with permission to edit grades
  2. Click on Grades in the course administration block
  3. Click the 'Categories and items' tab (or select it from the gradebook dropdown menu)
  4. Click the 'calculator symbol' (in the 'Actions' column, on the category total line) for the category you wish to set a calculation for
  5. Start with an equal sign (=)
  6. Choose a function; Example: =sum()
  7. Plug in your ID numbers enclosed in double square brackets, for example =sum([[item1]][[item2]][[item3]])
  8. Separate each ID number with a comma, for example =sum([[item1]],[[item2]],[[item3]])
  9. Click the "Save Changes" button

Asignando números ID

You can include the values of other grade items by using their ID number as references in your formulas. The ID number is surrounded by double square brackets, for example if you have a grade item with Quiz.3 as ID number, you will refer to this item as [[Quiz.3]] in your calculation.

Below the calculation field is a list of your course with its grade categories and grade items. Next to each item or category's total is displayed the ID number you can use in your calculation (already surrounded with double square brackets). However, since the ID number is optional, some items may not yet have one. These items without an ID number have instead a form field which lets you enter an ID number directly.

As soon as you have assigned the ID numbers you need, you can click the "Add ID numbers" button, and the page will reload and show you the same list with the ID numbers you have just assigned.

Funciones de cálculo

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. (The separator character could be a semicolon (;) in other languages, see below).

  • 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
  • an asterisk (*) gives the product of two items: [[item1]]*[[item2]]

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

Cálculos de ejemplo

  • =average([[Quiz.1]], [[Quiz.4]], [[Assignment.1]])
  • =average(max([[Quiz.1]], [[Quiz.4]], [[Assignment.1]]), min([[Quiz.1]], [[Quiz.4]], [[Assignment.1]]))
  • Weighted grade calculations where item 1 is weighted 30%, item 2 is weighted at 60% and item 3 is weighted at 200%: =sum([[1]]*0.3,[[2]]*0.6,[[3]]*2)

Cálculos cuando el idioma del usuario no es Inglés

Las fórmulas para cálculos usan el Separador decimal y el separador de listas definidos en cada paquete de Idioma.

El Separador decimal (un símbolo usado para marcar el límite entre las porciones entera y fraccional de un número decimal) es un punto (.) en Inglés y en el Español de México, pero es una coma (,) en el Español internacional y en algunos otros idiomas.

The list separator (a symbol used to separate a list of ID numbers in square brackets) is a comma (,) in English. In other languages it may be a semicolon (;).

Vea también