Difference between revisions of "CAS View"
From GeoGebra Manual
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==Basic input== | ==Basic input== | ||
Revision as of 21:26, 17 August 2011
Basic input
- Enter: evaluate input
- Ctrl+Enter: check input but do no evaluate input, e.g. b+b stays b+b. Note that assignments are always evaluated, e.g. a := 5
- In an empty row type
- space bar for previous output
- ) for previous output in parentheses
- = for previous input
- Suppress output with a semicolon at the end of your input, e.g. a := 5;
Toolbar
- Clicking a button in the toolbar applies a command to the currently edited row
- You can select part of the input text to only apply the operation to this selected part
Variables
Assignments & Connection with GeoGebra
- Assignments use the := notation, e.g. b := 5, a(n) := 2n + 3
- To free up a variable name again, use Delete[b] or b :=
- Variables and functions are always shared between the CAS view and GeoGebra if possible. If you define b:=5 in the CAS view, then you can use b in all of GeoGebra. If you have a function f(x)=x^2 in GeoGebra, you can also use this function in the CAS view.
Row References
You can refer to other rows in the CAS view in two ways
- Static row references insert text from another row, so your input is changed.
- # inserts the previous output
- #5 inserts the output of row 5
- ## inserts the previous input
- #5# inserts the input of row 5
- Dynamic row references use text from another row, but don't change your input.
- $ inserts the previous output
- $5 inserts the output of row 5
- $$ inserts the previous input
- $5$ inserts the input of row 5
Equations
- Equations are written using the simple Equals sign, e.g. 3x + 5 = 7
- You can perform arithmetic operations on equations, e.g. (3x + 5 = 7) - 5 subtracts 5 from both sides of the equation. This is useful for manual equation solving.
- LeftSide[3x + 5 = 7] gives 3x+5 and RightSide[3x + 5 = 7] gives 7
Commands and Tools
For a complete list of commands and tools see CAS Commands and CAS tools.