Random Numbers
EasyFit allows to generate high quality random numbers from any of the supported probability distributions. Select a distribution from the drop-down list, and specify distribution parameters.
Options
- Sample Size is the number of data points you want to generate;
- Random Seed can be used to initialize (seed) the random number generator in order to reproduce the same sequence of pseudorandom numbers; specify a positive integer number (1, 2, ...) to produce a specific sequence; leaving this field blank or setting it to 0 will result in producing a different sequence of random numbers;
- Destination is the location where the resulting data should be stored.
Click OK to start the random number generation process.
Limitations
For every destination type, there is a maximum allowable sample size:
| EasyFit data tables | 250,000 |
| Excel 2000, 2002, 2003 worksheets | 65,536 |
| Excel 2007, 2010 worksheets | 1,048,576 |
| Clipboard | 250,000 |
| Text files | 1,000,000,000 |
Generator
EasyFit uses the Mersenne Twister algorithm which generates very high quality pseudorandom numbers. The generator has a period of 219937-1 (more than 106000) and passes numerous tests for statistical randomness, including the well-known Diehard tests (a number of statistical tests for measuring the quality of a set of random numbers). These qualities, along with its high speed, make the Mersenne Twister generator an algorithm of choice for most statistical simulations.
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