Difference between revisions of "LlLog10"
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{{ | {{LSL Function | ||
|func_id=264|func_sleep=0.0|func_energy=10.0 | |func_id=264|func_sleep=0.0|func_energy=10.0 | ||
|func=llLog10|return_type=float|p1_type=float|p1_name=val | |func=llLog10|return_type=float|p1_type=float|p1_name=val | ||
|func_footnote=To get the {{Wikipedia | |func_footnote=To get the {{Wikipedia|natural logarithm|w=n}} use [[llLog]].<br/>llLog10 should only be used where the base 10 log is needed, all other applications should use [[llLog]] instead. | ||
|func_desc | |func_desc | ||
|return_text=that is the base 10 {{Wikipedia| | |return_text=that is the base 10 {{Wikipedia|logarithm|w=n}} of '''val'''.<br/>If '''val''' <= 0 return {{HoverText|zero|0.0}} instead. | ||
|spec | |spec | ||
|caveats= | |caveats= |
Revision as of 13:44, 17 February 2012
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Summary
Function: float llLog10( float val );264 | Function ID |
0.0 | Forced Delay |
10.0 | Energy |
Returns a float that is the base 10 logarithm of val.
If val <= 0 return zero instead.
• float | val |
To get the natural logarithm use llLog.
llLog10 should only be used where the base 10 log is needed, all other applications should use llLog instead.
Caveats
Examples
<lsl>default {
state_entry() { float num1 = llFrand(100.0);
llOwnerSay("The base 10 logarithm of " + (string)num1 + " is " + (string)llLog10(num1)); }}</lsl>
Notes
There are only two log functions llLog and llLog10. Errors introduced as a result of floating-point arithmetic are most noticable when working with logarithms. llLog should be used instead of llLog10 when converting the base of the logarithm. <lsl>float LogBaseN = llLog(value) / llLog(Base); //This technique introduces errors but is the only way</lsl>