The function provides entomological indicators for entomological surveillance with ovitraps.
     
    
    indicators(path_ovitraps, scale, locality, fac_axes)
 
    
    Arguments
- path_ovitraps
- is the path of the folder where the data is located. 
- scale
- is the resolution of the analysis (ovitrap for house/ovitraps and block for blocks). 
- locality
- is the location of interest. 
- fac_axes
- is a numeric value to control the height of the secondary axis