ecodata

<p>The data set <code>ecodata</code> contains four columns, the first one (named ``Years'') is the time (years from 1989 to 2008, monthly resolution), the second (named ``SST'') are monthly anomalies of sea surface temperature (SST) of the south of Gran Canaria (28.5 N/16.5 W) (NOAA 2021a), the third column (named ``NAO'') are the monthly index of the North Atlantic Oscillation (NAO) (NOAA 2021b), and the last column (named ``CPUE'') are monthly catches of common octopus (measured as CPUE or Catch Per Unit of Effort) from an artisanal fisheries from the Southwest of Gran Canaria Islands (Caballero-Alfonso et al. 2010, Polanco et al. 2011, Polanco-Martínez 2012).</p>

ecological_dataset

Estimates and plots (as a single plot and as a heat map) the rolling window correlation coefficients between two time series and computes their statistical significance, which is carried out through a non-parametric computing-intensive method. This method addresses the effects due to the multiple testing (inflation of the Type I error) when the statistical significance is estimated for the rolling window correlation coefficients. The method is based on Monte Carlo simulations by permuting one of the variables (e.g., the dependent) under analysis and keeping fixed the other variable (e.g., the independent). We improve the computational efficiency of this method to reduce the computation time through parallel computing. The 'NonParRolCor' package also provides examples with synthetic and real-life environmental time series to exemplify its use. Methods derived from R. Telford (2013) <https://quantpalaeo.wordpress.com/2013/01/04/> and J.M. Polanco-Martinez and J.L. Lopez-Martinez (2021) <doi:10.1016/j.ecoinf.2021.101379>.

Josue Polanco-Martinez

NonParRolCor

a Non-Parametric Statistical Significance Test for Rolling
Window Correlation

Josue M. Polanco-Martinez

Jose L. Lopez-Martinez

ecodata function

<p>One file in ASCII format containing four columns and 240 rows, columns are separated by spaces.</p>

ecodata: Ecological data set to exemplify the use of the functions contained in NonParRolCor

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