Description Usage Arguments Details
The correlation between x and y will be exactly rho. If only fraction is given but not rho_sub, rho_sub will be set to rho.
| 1 2 | getBiCop_exact(N, rho, rho_sub = NA, mu1 = 0, sd1 = 1, fraction = NA,
  distribution = "norm_norm")
 | 
| N | Sample size | 
| rho | True correlation coefficient in the sample if rho_sub is not given, otherwise rho is the correlation in the rest of the sample that does not belong to the subset | 
| rho_sub | Correlation in the subset | 
| mu1 | Mean of variable x (on log scale if type = "log_norm") | 
| sd1 | Standard deviation of variable x (on log scale if type = "log_norm") | 
| fraction | Fraction of the returned data.frame that belongs to the subset. The subset consists of the first round(N * fraction) rows | 
| type | The distributions of the two variables (columns). If "norm_norm" both are normally distributed, if "log_log" both are lognormally distributed, if type = "log_norm" x will be lognormally distributed and y standard normal. | 
Code from http://stats.stackexchange.com/questions/15011/generate-a-random-variable-with-a-defined-correlation-to-an-existing-variable
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