Difference between revisions of "Documentation/How Tos/Calc: LOGNORMDIST function"
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{{Documentation/SeeAlso| | {{Documentation/SeeAlso| | ||
| − | * [[Documentation/How_Tos/Calc: LOGINV function|LOGINV]] | + | * [[Documentation/How_Tos/Calc: LOGINV function|LOGINV]] |
| − | * [[Documentation/How_Tos/Calc: NORMDIST function|NORMDIST]] | + | * [[Documentation/How_Tos/Calc: NORMDIST function|NORMDIST]] |
| − | * [[Documentation/How_Tos/Calc: NORMSDIST function|NORMSDIST]] | + | * [[Documentation/How_Tos/Calc: NORMSDIST function|NORMSDIST]] |
| − | * [[Documentation/How_Tos/Calc: NORMSINV function|NORMSINV]] | + | * [[Documentation/How_Tos/Calc: NORMSINV function|NORMSINV]] |
| − | * [[Documentation/How_Tos/Calc: NORMINV function|NORMINV]] | + | * [[Documentation/How_Tos/Calc: NORMINV function|NORMINV]] |
| − | * [[Documentation/How_Tos/Calc: ERF function|ERF]] | + | * [[Documentation/How_Tos/Calc: ERF function|ERF]] |
| − | * [[Documentation/How_Tos/Calc: LN function|LN]] | + | * [[Documentation/How_Tos/Calc: LN function|LN]] |
* [[Documentation/How_Tos/Calc: SQRT function|SQRT]] | * [[Documentation/How_Tos/Calc: SQRT function|SQRT]] | ||
Revision as of 14:20, 26 February 2009
LOGNORMDIST
Calculates values for the cumulative distribution function of a lognormal distribution.
Syntax:
LOGNORMDIST(x; μ; σ;)
- A variable is lognormally distributed if its natural logarithm is normally distributed. Parameters of the distribution are μ (mean) and σ (standard deviation).
- LOGNORMDIST calculates the cumulative density function for a lognormal distribution.
- LOGNORMDIST(x; μ; σ;) is equivalent to NORMDIST((LN(x)-μ)/σ; 0; 1; 1); it may also be calculated from 0.5 + 0.5 * ERF((LN(x)-μ)/(σ*SQRT(2)))
Example:
LOGNORMDIST(1; 0; 1)
- returns 0.5.
Template:Documentation/SeeAlso
Issues:
- In the forthcoming international standard ODFF this function has an extra parameter, allowing calculation of the probability density function as well.
