log: Difference between revisions

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m (Text replacement - "<sqf>([^↵][^<]*↵[^<]*)<\/sqf>" to "<sqf> $1 </sqf>")
 
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[[Category:Scripting Commands|LOG]]
{{RV|type=command
[[Category:Scripting Commands OFP 1.96|LOG]]
[[Category:Scripting Commands OFP 1.46|LOG]]
[[Category:Scripting Commands ArmA|LOG]]


|game1= ofp
|version1= 1.00


<h2 style="color:#000066"> '''log ''x'''''</h2>
|game2= ofpe
|version2= 1.00


|game3= arma1
|version3= 1.00


'''Operand types:'''
|game4= arma2
|version4= 1.00


'''x:''' [[Number]]
|game5= arma2oa
|version5= 1.50


'''Type of returned value:'''
|game6= tkoh
|version6= 1.00


[[Number]]
|game7= arma3
|version7= 0.50


'''Description:'''
|gr1= Math


Base-10 logarithm of '''x'''.
|descr= Base-10 logarithm of x. [[File:A3 logx.jpg|thumb|The function of log(x) will never touch the y-axis.]]


|s1= [[log]]  x


'''Example:'''
|p1= x: [[Number]] - a positive number


_log = '''log''' 10 ..........Result is 1
|r1= [[Number]]
 
|x1= <sqf>_log = log 10;</sqf>
 
|x2= <sqf>_log = log abs -10;</sqf>
 
|x3= <sqf>finite log -10; // Returns false</sqf>
 
|seealso= [[Math Commands]] {{Link|https://en.wikipedia.org/wiki/Logarithm|Logarithm}}
}}
 
<dl class="command_description">
 
<dt></dt>
<dd class="notedate">Posted on 23:14, 16 Jun 2014</dd>
<dt class="note">[[User:ffur2007slx2_5|ffur2007slx2_5]]</dt>
<dd class="note">
To clarify:
<sqf>y = 10 ^ x // x = log y</sqf>
People use logarithm at the purpose of simplifying multiplication via exponents plus years before.
<sqf>
23456*45634 = 1.07039e9
log 23456 = 4.37025; log 45634 = 4.65929; (log 23456) + (log 45634) = 9.02954
10^((log 23456) + (log 45634)) = 10 ^ 9.02954  // same as 23456*45634
</sqf>
As modern usage, for instance, to evaluate another exponent when multiple is known (Which magnitude is 4 times stronger than 8.3 earthquake?):
<sqf>
//_Unknown = log x; 8.3 = log y
// x = 10 ^_Unknown; y = 10 ^8.3
//x/y = (10 ^_Unknown)/(10 ^8.3) = log 4
// x/y = _Unknown – 8.3 = 0.6
//_result = 8.9 magnitude
_result = (log 4) + 8.3
</sqf>
</dd>
 
</dl>

Latest revision as of 19:43, 3 September 2024

Logo A0.png1.00ofpe logo.png1.00Logo A1 black.png1.00Logo A2.png1.00A2 OA Logo.png1.50tkoh logo small.png1.00Arma 3 logo black.png0.50
Hover & click on the images for description

Description

Description:
Base-10 logarithm of x.
The function of log(x) will never touch the y-axis.
Groups:
Math

Syntax

Syntax:
log x
Parameters:
x: Number - a positive number
Return Value:
Number

Examples

Example 1:
_log = log 10;
Example 2:
_log = log abs -10;
Example 3:
finite log -10; // Returns false

Additional Information

See also:
Math Commands Logarithm

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Posted on 23:14, 16 Jun 2014
ffur2007slx2_5
To clarify:
y = 10 ^ x // x = log y
People use logarithm at the purpose of simplifying multiplication via exponents plus years before.
23456*45634 = 1.07039e9 log 23456 = 4.37025; log 45634 = 4.65929; (log 23456) + (log 45634) = 9.02954 10^((log 23456) + (log 45634)) = 10 ^ 9.02954 // same as 23456*45634
As modern usage, for instance, to evaluate another exponent when multiple is known (Which magnitude is 4 times stronger than 8.3 earthquake?):
//_Unknown = log x; 8.3 = log y // x = 10 ^_Unknown; y = 10 ^8.3 //x/y = (10 ^_Unknown)/(10 ^8.3) = log 4 // x/y = _Unknown – 8.3 = 0.6 //_result = 8.9 magnitude _result = (log 4) + 8.3
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