math.eval - Revision history

Adriweb at 20:01, 19 April 2016

2016-04-19T20:01:50Z

Adriweb at 15:52, 15 May 2013

2013-05-15T15:52:51Z

Adriweb at 19:24, 16 June 2012

2012-06-16T19:24:27Z

Adriweb at 17:53, 16 June 2012

2012-06-16T17:53:48Z

Adriweb: /* Example */

2012-06-06T11:09:04Z

Example

Jimbauwens at 15:40, 11 March 2012

2012-03-11T15:40:37Z

Jimbauwens: Created page with "math.eval is a math library extension.
The function calls the math server with the specified arguments and returns the a numerica..."

2012-03-11T15:40:14Z

Created page with "math.eval is a math library extension. The function calls the math server with the specified arguments and returns the a numerica..."

New page

math.eval is a math library extension.

 

The function calls the math server with the specified arguments and returns the a numerical result if possible. 

== Syntax ==

var.'''eval(expression)''' evaluates "expression" (can contain Basic arguments) and returns a result as a number if possible. 

Expression can contain everything a TI-Basic function can contain. You can seperate statements using ":".

It can also contain calls to user defined functions in the document, or functions in global libraries.

== Example ==

<source lang="lua">math.eval("sqrt(2^3)")</source>

 

== See also ==

@@ Line 13: / Line 13: @@
 '''Example''' : To evaluate ''f1'' for a given value in x, the parameter x must be converted to a string, and then any embedded "e" must be replaced with Unicode character U+F000. <br />
-<source lang="lua">local mx = tostring(x):gsub("e", string.uhar(0xF000))
+<source lang="lua">local mx = tostring(x):gsub("e", string.uchar(0xF000))
 local expr = "f1(" .. mx .. ")"
 return math.eval(expr)</source>

← Older revision		Revision as of 15:52, 15 May 2013
Line 1:		Line 1:
	<span style="font-weight: bold;">math.eval</span> is a math library extension. <br />		<span style="font-weight: bold;">math.eval</span> is a math library extension. <br />
		+
		+	{{Since\|3.0}}
		+

	The function calls the math server with the specified arguments and returns the a numerical result if possible.<br>		The function calls the math server with the specified arguments and returns the a numerical result if possible.<br>

← Older revision		Revision as of 19:24, 16 June 2012
Line 33:		Line 33:
	== See also ==		== See also ==
	[[math.evalStr]]		[[math.evalStr]]
		+
		+
		+	[[Category:Extended_Standard_Library]]

@@ Line 1: / Line 1: @@
-<span style="font-weight: bold;">math.eval</span> is a math library extension.
+<span style="font-weight: bold;">math.eval</span> is a math library extension. <br />
-<br>
+The function calls the math server with the specified arguments and returns the a numerical result if possible.<br>
-The function calls the math server with the specified arguments and returns the a numerical result if possible.<br>
+<source lang="lua">local mx = tostring(x):gsub("e", string.uhar(0xF000))
-== Syntax  ==
+'''Note''' : Because ''math.eval'' always does calculations in approximate mode, things like Boolean logic and some conversions will throw an error: <br />
-Expression can contain everything a TI-Basic function can contain. You can seperate statements using ":".
+== Syntax  ==
 It can also contain calls to user defined functions in the document, or functions in global libraries.
 == Example  ==
 <source lang="lua">math.eval("sqrt(16)") -- returns 4</source>
 == See also ==