Etienne Model Class

class ecolopy_dev.models.etienne_model.EtienneModel(community, **kwargs)

Class representing Ecological models

Parameters:name – name of the class, can be either ewens, etienne or lognorm Returns:EcologicalModel object

likelihood(params)

log-likelihood function

Parameters:params –

a list of 2 parameters:

• theta = params[0]
• m = params[1]

Returns:log likelihood of given theta and I

optimize(method='fmin', start=None, verbose=True)

Main function to optimize theta and I using etienne likelihood function using Scipy package, values that are closest to the one proposed by Tetame, are raised by fmin function.

Parameters:

• method (fmin) – optimization strategy, can be one of fmin, slsqp, l_bfgs_b or tnc (see scipy.optimize documentation)
• start ((community.S,0.5)) – tupple for startin values of theta and m
• verbose (True) – displays running status

random_community(inds=None, theta=None, immig=None)

generates random distribution according to J, theta and I

Parameters:

• inds – number of individuals in community (J)
• theta – corresponding to the model
• immig – immigration rate (I)

Returns:

distribution of abundance (list)