R/pixel_work.R
    draw_parameters_three.RdTakes a parameter that is an expression (of drawing a distribution) and calls it.
draw_parameters_three(parameters, N)
| parameters | The config file parameters, no draws on input.  | 
    
|---|---|
| N | the number of draws to make. Can be 1 for no draws.  | 
    
A data frame with one row per draw, even if it's one. Goes with pixel_three.