. 2018 May 16;6:e4587. doi: 10.7717/peerj.4587

Table 6. Estimated parameters for the linear and polynomial growth curve models of body size in brown frogs.

Criterion/model	Groups	Model parameter					R²	R²_adj
Criterion/model	Groups	d₀	d₁	d₂	d₃	d₄	R²	R²_adj
Age 1	Linear	1.665	0.107				0.777	0.777
	Polynomials, second order	1.063	0.288	−9.508E-3			0.907	0.907
	Polynomials, third order	0.951	0.351	−1.754E-2	2.819E-3		0.909	0.909
	Polynomials, fourth order	9.220	0.375	−2.293E-2	7.148E-4	−1.139E-5	0.909	0.909
Age 2	Linear	3.254	0.127				0.812	0.811
	Polynomials, second order	2.671	0.286	−7.571E-3			0.887	0.887
	Polynomials, third order	2.592	0.327	−1.227E-2	1.491E-4		0.888	0.888
	Polynomials, fourth order	2.993	1.293E-2	5.120E-2	−4.473E-3	1.100E-4	0.898	0.898