An integrated set of tools to allow data users to conduct 
    meteorological normalisation and counterfactual modelling for air quality 
    data. The meteorological normalisation technique uses predictive random 
    forest models to remove variation of pollutant concentrations so trends and 
    interventions can be explored in a robust way. For examples, see 
    Grange et al. (2018) <doi:10.5194/acp-18-6223-2018> and 
    Grange and Carslaw (2019) <doi:10.1016/j.scitotenv.2018.10.344>. The random
    forest models can also be used for counterfactual or business as usual (BAU) 
    modelling by using the models to predict, from the model's perspective, the 
    future. For an example, see Grange et al. (2021) <doi:10.5194/acp-2020-1171>.

Extend Rasch and Item Response Theory (IRT) analyses by providing  
 tools for post-processing the output from five major IRT packages  
 (i.e., 'eRm', 'psychotools', 'ltm', 'mirt', and 'TAM').            
 The current version provides the plotPIccc() function, which       
 extracts from the return object of the originating package all     
 information required to draw an extended Person-Item-Map (PIccc),  
 showing any combination of                                         
 * category characteristic curves (CCCs),                           
 * threshold characteristic curves (TCCs),                          
 * item characteristic curves (ICCs),                               
 * category information functions (CIFs),                           
 * item information functions (IIFs),                               
 * test information function (TIF), and the                         
 * standard error curve (S.E.).                                     
 for uni- and multidimensional models (as far as supported by each  
 package). It allows for selecting dimensions, items, and categories
 to plot and offers numerous options to adapt the output. The return
 object contains all calculated values for further processing.

Legacy 'DBI' interface to 'MySQL' / 'MariaDB' based on old code
    ported from S-PLUS. A modern 'MySQL' client written in 'C++' is available
    from the 'RMariaDB' package.