Programmer Guide/Command Reference/EVAL Intro/EVAL - Revision history

Christian at 12:54, 1 April 2011

2011-04-01T12:54:17Z

← Older revision		Revision as of 14:54, 1 April 2011
Line 1:		Line 1:
	{{DISPLAYTITLE:{{SUBPAGENAME}}}}		{{DISPLAYTITLE:{{SUBPAGENAME}}}}
	The <code>EVAL</code> command can be used to evaluate numerical, vector, and matrix expressions. These expressions may be built up from numerical constants, from scalar, vector, and matrix variables, and from a large number of [[Programmer Guide/Command Reference/EVAL_Intro/~~EVAL_Sub-Commands~~\|EVAL ~~subcommands~~]], and operators.		The <code>EVAL</code> command can be used to evaluate numerical, vector, and matrix expressions. These expressions may be built up from numerical constants, from scalar, vector, and matrix variables, and from a large number of [[Programmer Guide/Command Reference/EVAL_Intro/EVAL_Functions\|EVAL functions]], and operators.
	// if the variable #v does not exist then the following command		// if the variable #v does not exist then the following command
	// assigns a table item to #v.		// assigns a table item to #v.

2011-03-23T15:05:27Z

← Older revision		Revision as of 17:05, 23 March 2011
Line 1:		Line 1:
	{{DISPLAYTITLE:{{SUBPAGENAME}}}}		{{DISPLAYTITLE:{{SUBPAGENAME}}}}
	The <code>EVAL</code> command can be used to evaluate numerical, vector, and matrix expressions. These expressions may be built up from numerical constants, from scalar, vector, and matrix variables, and from a large number of [[Programmer Guide/Command Reference/EVAL_Intro/~~EVAL Subcommands~~\|EVAL subcommands]], and operators.		The <code>EVAL</code> command can be used to evaluate numerical, vector, and matrix expressions. These expressions may be built up from numerical constants, from scalar, vector, and matrix variables, and from a large number of [[Programmer Guide/Command Reference/EVAL_Intro/EVAL_Sub-Commands\|EVAL subcommands]], and operators.
	// if the variable #v does not exist then the following command		// if the variable #v does not exist then the following command
	// assigns a table item to #v.		// assigns a table item to #v.

2011-03-22T20:10:32Z

Numerical Comparison Operators

← Older revision		Revision as of 22:10, 22 March 2011
Line 19:		Line 19:

	If the expression is syntactically ill-formed, an error (<code>EVAL</code>) or warning (<code>EVALCHECK</code>) is reported. See the example script <code>expression_check.sts</code> for details.		If the expression is syntactically ill-formed, an error (<code>EVAL</code>) or warning (<code>EVALCHECK</code>) is reported. See the example script <code>expression_check.sts</code> for details.

			=== Numerical Objects ===
			{{:Programmer_Guide/Command_Reference/EVAL_Intro/Numerical_objects}}

	=== Numerical Comparison Operators ===		=== Numerical Comparison Operators ===

2011-03-22T20:04:24Z

Version History

← Older revision		Revision as of 22:04, 22 March 2011
Line 67:		Line 67:
	Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:		Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:
	result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // result is 4		result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // result is 4

	~~=== Version History ===~~
	The <code>EVAL</code> command was added to the S_TOOLS-STx language in version 3.7.0. The <code>EVAL</code> command replaces and extends the <code>EVALUATE</code> command. If the <code>EVAL</code> command is not assigning to an existing item, a table is assigned. Note that the current maximum number of arguments is 64 (S_TOOLS-STx version 3.8.0). As of version 3.7.0, S_TOOLS-STx has more [[Programmer Guide/Command Reference/EVAL/Numerical objects\|numerical objects]] than just the scalars <code>INT</code> and <code>NUM</code>.
	{\|
	\|-
	\|
	\|}

2011-03-22T20:03:25Z

Examples

← Older revision		Revision as of 22:03, 22 March 2011
Line 67:		Line 67:
	Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:		Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:
	result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // result is 4		result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // result is 4

	~~=== Examples ===~~
	~~See the script <code>eval_examples.sts</code> for an extensive list of examples.~~

	=== Version History ===		=== Version History ===

2011-03-22T20:02:14Z

Logical Operators

← Older revision		Revision as of 22:02, 22 March 2011
Line 63:		Line 63:
	\|}		\|}

	A C<nowiki>-</nowiki>like '<code>? :'</code> operator is also supported:		A C<nowiki>-</nowiki>like '<code>? :'</code> selection operator is also supported:
	result := eval 1 < 2 ? 1+2 : 1-2 // result is 3		result := eval 1 < 2 ? 1+2 : 1-2 // result is 3
	Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:		Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:

2011-03-22T20:01:55Z

Logical Operators

2011-03-22T20:01:06Z

Syntax

← Older revision		Revision as of 22:01, 22 March 2011
Line 9:		Line 9:
	An <code>EVAL</code> command uses the following general syntax:		An <code>EVAL</code> command uses the following general syntax:
	result := eval expression		result := eval expression
			or
	result := evalcheck expression		result := evalcheck expression
	An expression may be either a numerical expression, e.g.		An expression may be either a numerical expression, e.g.

2011-03-22T20:00:29Z

← Older revision		Revision as of 22:00, 22 March 2011
Line 1:		Line 1:
	{{DISPLAYTITLE:{{SUBPAGENAME}}}}		{{DISPLAYTITLE:{{SUBPAGENAME}}}}
	The <code>EVAL</code> command can be used to evaluate numerical expressions. These expressions ~~can~~ be constants, scalar variables, ~~vectors, matrices or <code>~~[[Programmer Guide/Command Reference/~~EVAL~~/EVAL Subcommands\|EVAL~~]]</code>[[Programmer Guide/Command Reference/EVAL_Intro/EVAL Subcommands\|~~ subcommands]].		The <code>EVAL</code> command can be used to evaluate numerical, vector, and matrix expressions. These expressions may be built up from numerical constants, from scalar, vector, and matrix variables, and from a large number of [[Programmer Guide/Command Reference/EVAL_Intro/EVAL Subcommands\|EVAL subcommands]], and operators.
	// if the variable #v does not exist then the following command		// if the variable #v does not exist then the following command
	// assigns a table item to #v.		// assigns a table item to #v.

2011-03-22T19:57:24Z

Logical Operators

← Older revision		Revision as of 21:57, 22 March 2011
Line 63:		Line 63:

	A C<nowiki>-</nowiki>like '<code>? :'</code> operator is also supported:		A C<nowiki>-</nowiki>like '<code>? :'</code> operator is also supported:
	~~<code>~~result := eval 1 < 2 ? 1+2 : 1-2 // result is 3~~</code>~~		result := eval 1 < 2 ? 1+2 : 1-2 // result is 3
	Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:		Note that unlike C, nested uses of this operator must be surrounded by brackets, e.g.:
	~~<code>~~result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // ~~returns~~ 4~~</code>~~		result := eval 1 > 2 ? (5 == 5 ? 5 : 0) : (4 == 5 ? 3 : 4) // result is 4

	=== Examples ===		=== Examples ===