SINGAPORE – 26 SEPTEMBER 2012 – Numerical Technologies today announced the release of NtRand® 3.3. NtRand®, a free Microsoft Excel add-in RNG (random number generator) based on the Mersenne Twister algorithm, can be used in pricing financial derivatives and in risk management studies. In the new version, NtRand® has greatly improved the precision of its distribution functions by adopting the calculation algorithm of Boost, the pioneering C++ open source library.
The precision of each distribution function in NtRand® 3.3 now closely approximates the precision of its corresponding Excel 2007 and 2010 function.* For the probability density function and cumulative distribution function of a normal distribution, NtRand® 3.3 can produce accurate values within the range of -37σ~37σ, which is an improvement from the previous range of -8σ~8σ. The enhanced functions are:
- NTBETADIST
- NTCHIDIST
- NTCHISQDIST
- NTGAMMADIST
- NTJOHNSONSUDIST
- NTJOHNSONINV
- NTLOGNORMDIST
- NTLOGNORMINV
- NTNORMDIST
- NTNORMINV
- NTTDIST
- NTTRUNCNORMDIST
- NTTRUNCNORMINV
- NTWEIBULLDIST
- NTWEIBULLINV
In addition to the above enhancements, NtRand 3.3 introduces seven functions:
- NTBETAINV
- NTCHIIDISTINV
- NTCHISQINV
- NTFDISTINV
- NTGAMMAINV
- NTPOISSONDISTINV
- NTTDUSTINV
For more information about NtRand® or to download a copy, visit www.ntrand.com.
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* (relative error : [latex]10^{-15}\sim 10^{-16}[/latex]) http://www.csdassn.org/software_reports.cfm
