### Christian Salas-Eljatib

A simple website to show you who am I

A height-diameter model has the following structure $$h_i=f({\theta},d_i) + \epsilon_i, \label{eq:modh.0}$$
where: $h_i$ is height at the $i$-th tree; $d_i$ is diameter at breast height at the $i$-th tree; $f()$ is a mathematical function; ${\theta}$ is a vector of coefficients (i.e., parameters) of model $f()$; $\epsilon_{i}$ is the random term for the $i$-th tree following a Gaussian probability density function having an expected value of zero and variance $\sigma^2_{\epsilon}$. Noice that function $f()$ could either be linear o non-linear.