Mat for Beginners - Revision history

Laura: /* Examples */

2013-01-23T20:44:16Z

Examples

← Older revision		Revision as of 20:44, 23 January 2013
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	Arrays can be sorted, which changes the order of the items contained within the arrays. For example, to sort an array ~~of string constants~~:		Arrays can be sorted, which changes the order of the items contained within the arrays. For example, to sort an array in ascending order:

	AIDX(Mat A$)		AIDX(Mat A)

			returns
			0
			10
			25
			30
			40

	Arrays can also have more than one dimension.		Arrays can also have more than one dimension.

Laura: /* Examples */

2013-01-23T20:42:26Z

Examples

← Older revision		Revision as of 20:42, 23 January 2013
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	These are easiest to picture like a spread sheet with the two numbers identifying which cell a value is contained in (or like X and Y on a graph). Arrays can have up to 9 dimensions.		These are easiest to picture like a spread sheet with the two numbers identifying which cell a value is contained in (or like X and Y on a graph). Arrays can have up to 9 dimensions.

	~~See [[Mat]] for more details.~~

	==See Also==		==See Also==

Laura: /* Examples */

2013-01-23T20:42:09Z

Examples

← Older revision		Revision as of 20:42, 23 January 2013
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	each item in the array can contain a different value. for example		each item in the array can contain a different value. for example
	:A(1)=10		A(1)=10
	:A(2)=30		A(2)=30
	:A(3)=25		A(3)=25
	:A(4)=40		A(4)=40

	~~one thing you can do with a~~ mat statement is refer to the whole array, ~~so if you said~~		A mat statement is refer to the whole array, for example:
	PRINT MAT A		PRINT MAT A
	the ~~system would return~~		returns the following:
	:10		10
	:30		30
	:25		25
	:40		40

	~~another thing you can do with a~~ mat statement is change how large the array is		A mat statement can also be used to change how large the array is, for example:
	MAT A(5)		MAT A(5)
	~~would change~~ the array to have 5 items in it.		changes the array to have 5 items in it.
	so after executing MAT A(5) ~~if you did~~		Then, after executing MAT A(5) and typing:
	PRINT MAT A		PRINT MAT A
	you would get		you would get
	:10		10
	:30		30
	:25		25
	:40		40
	:0		0

	~~(because the~~ 5th item never ~~got~~ set to anything)		The 5th item was never set to anything, so A(5) returns a 0.

	~~you~~ can also ~~use a mat statement to~~ refer to a range within an array, for example		A mat statement can also refer to a range within an array, for example
	PRINT MAT A(2:4)		PRINT MAT A(2:4)
	would return		would return
	:30		30
	:25		25
	:40		40

	Arrays can be sorted ~~thus changing~~ the order of the items contained within the arrays.		Arrays can be sorted, which changes the order of the items contained within the arrays. For example, to sort an array of string constants:

	~~also arrays can have more than one dimension.~~		AIDX(Mat A$)
	:X(~~1,1~~)=5
	~~:X(1,2)=10~~
	~~:X(2,1)=15~~
	~~:X(2,2)=20~~

	~~these~~ are ~~best envisioned~~ like a spread sheet~~... having~~ two numbers ~~to identify~~ which cell a value is contained in.		Arrays can also have more than one dimension.
			X(1,1)=5
			X(1,2)=10
			X(2,1)=15
			X(2,2)=20

			These are easiest to picture like a spread sheet with the two numbers identifying which cell a value is contained in (or like X and Y on a graph). Arrays can have up to 9 dimensions.

			See [[Mat]] for more details.

	==See Also==		==See Also==

Laura: Created page with "'''Mat''' (M) is short for '''matrix'''. A matrix is another word for an '''array'''. An array of variables in this case. An array is a series of variables. ==..."

2013-01-23T20:25:57Z

Created page with "'''Mat''' (M) is short for '''matrix'''. A matrix is another word for an '''array'''. An array of variables in this case. An array is a series of variables. ==..."

New page

'''Mat''' (M) is short for '''matrix'''. A matrix is another word for an '''array'''. An array of [[Variable|variables]] in this case. An array is a series of variables.

==Examples==
Mat A would refer to the whole array of A(1) to A(10) (if 10 is the highest item in the array)

each item in the array can contain a different value. for example
:A(1)=10
:A(2)=30
:A(3)=25
:A(4)=40

one thing you can do with a mat statement is refer to the whole array, so if you said
PRINT MAT A
the system would return
:10
:30
:25
:40

another thing you can do with a mat statement is change how large the array is
MAT A(5)
would change the array to have 5 items in it.
so after executing MAT A(5) if you did
PRINT MAT A
you would get
:10
:30
:25
:40
:0

(because the 5th item never got set to anything)

you can also use a mat statement to refer to a range within an array, for example
PRINT MAT A(2:4)
would return
:30
:25
:40

Arrays can be sorted thus changing the order of the items contained within the arrays.

also arrays can have more than one dimension.
:X(1,1)=5
:X(1,2)=10
:X(2,1)=15
:X(2,2)=20

these are best envisioned like a spread sheet... having two numbers to identify which cell a value is contained in.

==See Also==
* [[Srch]]
* [[Mat]]

<noinclude>
[[Category:Basics]]
</noinclude>