Difference between revisions of "Lists"
From GeoGebra Manual
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Using curly braces you can create a list of several objects (e. g. points, segments, circles). | Using curly braces you can create a list of several objects (e. g. points, segments, circles). | ||
| − | {{Example|1=< | + | {{Example|1=<br> |
* <code>L = {A, B, C}</code> gives you a list consisting of three prior defined points A, B, and C. | * <code>L = {A, B, C}</code> gives you a list consisting of three prior defined points A, B, and C. | ||
* <code>L = {(0, 0), (1, 1), (2, 2)}</code> produces a list that consists of the entered points, as well as these nameless points. }} | * <code>L = {(0, 0), (1, 1), (2, 2)}</code> produces a list that consists of the entered points, as well as these nameless points. }} | ||
| − | {{Note|By default, the elements of this list are not shown in the Graphics View. | + | {{Note|By default, the elements of this list are not shown in the Graphics View.}} |
==Compare Lists of Objects== | ==Compare Lists of Objects== | ||
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* List^2: Squares every element of the list. | * List^2: Squares every element of the list. | ||
* 2^List: Creates list of powers of two with exponents from the list. | * 2^List: Creates list of powers of two with exponents from the list. | ||
| − | * List1^List2: Creates list of a^b, where a and b are corresponding elements of List1 and List2. | + | * List1^List2: Creates list of ''a^b'', where ''a'' and ''b'' are corresponding elements of List1 and List2. |
* sin(List): Applies the sine function to every element of the list. User defined [[Functions|functions]] can be applied the same way as well. | * sin(List): Applies the sine function to every element of the list. User defined [[Functions|functions]] can be applied the same way as well. | ||
Revision as of 10:54, 13 May 2011
Using curly braces you can create a list of several objects (e. g. points, segments, circles).
Example:
L = {A, B, C}gives you a list consisting of three prior defined points A, B, and C.L = {(0, 0), (1, 1), (2, 2)}produces a list that consists of the entered points, as well as these nameless points.
Note: By default, the elements of this list are not shown in the Graphics View.
Compare Lists of Objects
You can compare two lists of objects by using the following syntax:
- List1 == List2: Checks if the two lists are equal and gives you true or false as a result.
- List1 != List2: Checks if the two lists are not equal and gives you true or false as a result.
Apply Pre-defined Operations and Functions to Lists
If you apply operations and pre-defined functions to lists, you will always get a new list as a result.
Addition and subtraction
- List1 + List2: Adds corresponding elements of two lists. Note: The two lists need to be of the same length.
- List + Number: Adds the number to every element of the list.
- List1 – List2: Subtracts the elements of the second list from corresponding elements of the first list. Note: The lists need to be of the same length.
- List – Number: Subtracts the number from every element of the list.
Multiplication and division
- List1 * List2: Multiplies corresponding elements of two lists. Note: The lists need to be of the same length. If the two lists are compatible matrices, matrix multiplication is used.
- List * Number: Multiplies every list element with the number.
- List1 / List2: Divides elements of the first list by corresponding elements of the second list. Note: The two lists need to be of the same length.
- List / Number: Divides every list element by the number.
- Number / List: Divides the number by every element of the list.
Other examples
- List^2: Squares every element of the list.
- 2^List: Creates list of powers of two with exponents from the list.
- List1^List2: Creates list of a^b, where a and b are corresponding elements of List1 and List2.
- sin(List): Applies the sine function to every element of the list. User defined functions can be applied the same way as well.
