Returns the Weibull log probability density for the given location and scale. 
Given containers of matching sizes, returns the log sum of probability densities.
- Template Parameters
 - 
  
    | T_y | type of real parameter  | 
    | T_shape | type of shape parameter  | 
    | T_scale | type of scale parameter  | 
  
   
- Parameters
 - 
  
    | y | real parameter  | 
    | alpha | shape parameter  | 
    | sigma | scale parameter  | 
  
   
- Returns
 - log probability density or log sum of probability densities 
 
- Exceptions
 - 
  
    | std::domain_error | if y is negative, alpha or sigma are nonpositive  | 
  
   
Definition at line 40 of file weibull_lpdf.hpp.