Difference between revisions of "Tutorial:Basic Algebraic Input, Commands and Functions"
From GeoGebra Manual
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==Tips and Tricks== | ==Tips and Tricks== | ||
| − | * '''Name a new object''' by typing ''name ='' into the input bar in front of its algebraic representation. {{Example|P = (3, 2) creates point P.}} | + | * '''Name a new object''' by typing ''name ='' into the input bar in front of its algebraic representation. {{Example|1= P = (3, 2) creates point P.}} |
* '''Multiplication''' needs to be entered using an asterisk or space between the factors. {{Example|a*x or a x}} | * '''Multiplication''' needs to be entered using an asterisk or space between the factors. {{Example|a*x or a x}} | ||
* '''GeoGebra is case sensitive!''' Thus, upper and lower case letters must not be mixed up. | * '''GeoGebra is case sensitive!''' Thus, upper and lower case letters must not be mixed up. | ||
| − | **Points are always named with upper case letters {{Example|A = (1, 2)}} | + | **Points are always named with upper case letters {{Example|1= A = (1, 2)}} |
| − | ** Vectors are named with lower case letters {{Example|v = (1, 3)}} | + | ** Vectors are named with lower case letters {{Example|1= v = (1, 3)}} |
| − | **Segments, lines, circles, functions… are always named with lower case letters. {{Example|circle c: (x – 2)^2 + (y – 1)^2 = 16}} | + | **Segments, lines, circles, functions… are always named with lower case letters. {{Example|1= circle c: (x – 2)^2 + (y – 1)^2 = 16}} |
| − | ** The variable x within a function and the variables x and y in the equation of a conic section always need to be lower case. {{Example|f(x) = 3*x + 2}} | + | ** The variable x within a function and the variables x and y in the equation of a conic section always need to be lower case. {{Example|1= f(x) = 3*x + 2}} |
* If you want to use an '''object within an algebraic expression''' or command you need to create the object prior to using its name in the input bar. | * If you want to use an '''object within an algebraic expression''' or command you need to create the object prior to using its name in the input bar. | ||
** y = m x + b creates a line whose parameters are already existing values m and b (e.g. numbers / sliders). | ** y = m x + b creates a line whose parameters are already existing values m and b (e.g. numbers / sliders). | ||
Revision as of 14:09, 3 March 2012
Tips and Tricks
- Name a new object by typing name = into the input bar in front of its algebraic representation. Example: P = (3, 2) creates point P.
- Multiplication needs to be entered using an asterisk or space between the factors. Example: a*x or a x
- GeoGebra is case sensitive! Thus, upper and lower case letters must not be mixed up.
- Points are always named with upper case letters Example: A = (1, 2)
- Points are always named with upper case letters
- Vectors are named with lower case letters Example: v = (1, 3)
- Vectors are named with lower case letters
- Segments, lines, circles, functions… are always named with lower case letters. Example: circle c: (x – 2)^2 + (y – 1)^2 = 16
- Segments, lines, circles, functions… are always named with lower case letters.
- The variable x within a function and the variables x and y in the equation of a conic section always need to be lower case. Example: f(x) = 3*x + 2
- The variable x within a function and the variables x and y in the equation of a conic section always need to be lower case.
- If you want to use an object within an algebraic expression or command you need to create the object prior to using its name in the input bar.
- y = m x + b creates a line whose parameters are already existing values m and b (e.g. numbers / sliders).
- Line[A, B] creates a line through existing points A and B.
- Confirm an expression you entered into the input bar by pressing the Enter key.
- Open the help window for using the input bar and commands by selecting Help from the Help Menu (or shortcut F1).
- Error messages: Always read the messages – they could possibly help to fix the problem!
- Commands can be typed in or selected from the list next to the Input Bar.
Hint: If you don’t know which parameters are required within the brackets of a certain command, type in the full command name and press key F1 to open the GeoGebra Wiki.
- Automatic completion of commands: After typing in the first two letters of a command into the Input Bar, GeoGebra tries to complete the command.
- If GeoGebra suggests the desired command, hit the Enter key in order to place the cursor within the brackets.
- If the suggested command is not the one you wanted to enter, just keep typing until the suggestion matches.
