dot-cor_lagr_exp function

Calculate Lagrangian correlation of the exponential form

.cor_lagr_exp(v1, v2, k = 2, h1, h2, u)

Arguments

• v1: Prevailing wind, u-component.
• v2: Prevailing wind, v-component.
• k: Scale parameter of $\|\boldsymbol v\|$, $k>0$. Default is 2.
• h1: Horizontal distance matrix or array.
• h2: Vertical distance matrix or array, same dimension as h1.
• u: Time lag, same dimension as h1.

Returns

Correlations of the same dimension as h1.

Details

The Lagrangian correlation function of the exponential form with parameters $\boldsymbol v = (v_1, v_2)^\top\in\mathbb{R}^2$ has the form

where $\|\cdot\|$ is the Euclidean distance, $\mathbf{h} = (\mathrm{h}_1, \mathrm{h}_2)^\top\in\mathbb{R}^2$, and $k > 0$ is the scale parameter controlling the magnitude of asymmetry in correlation.

References

Diggle, P. J., Tawn, J. A., & Moyeed, R. A. (1998). Model-Based Geostatistics. Journal of the Royal Statistical Society. Series C (Applied Statistics), 47(3), 299–350.