generic_ews for MATLAB is a translation of the early warning toolbox from R to MATLAB. It includes also functions for sensitivity analysis and pvalues.
The code is used in
M. Scheffer, E.H. van Nes, D.Bird, R.K. Bocinsky, and T.A. Kohler (2021) Loss of Resilience Preceded Transformation of Prehispanic Pueblo Societies. PNAS
The code is used in Scheffer et al. 2021, and the code used in this paper is included.
# Dependency:
The software uses:
Statistics and Machine Learning Toolbox - Mathworks
Parallel Computing Toolbox (optional) - Mathworks
# Dependency:
The software uses:<ul>
<li>Statistics and Machine Learning Toolbox - Mathworks
adjustplot.m - helper function to improve the figures
ebisuzaki.m - generate null models according to the Ebisuzaki (1997) method
fishercombine.m - combine independent p values according to the Fisher method
generic_ews.m - the rolling window method for early warning signals (Dakos et al. 2008)
generic_ews_sens.m - sensitivity analysis of generic_ews
run_regime.m - the main figures of Scheffer et al. 2021 are created with this code, usage:
<ol><li>adjustplot.m - helper function to improve the figures\
<li>ebisuzaki.m - generate null models according to the Ebisuzaki (1997) method\
<li>fishercombine.m - combine independent p values according to the Fisher method\
<li>generic_ews.m - the rolling window method for early warning signals (Dakos et al. 2008)\
<li>generic_ews_sens.m - sensitivity analysis of generic_ews\
<li>run_regime.m - the main figures of Scheffer et al. 2021 are created with this code, usage:
run_regime(data,regime), where data should be a MATLAB table with
(at least) two fields:
trees
tot_hab_cell
The regime should be one of these strings:
(at least) two fields:<br>
trees<br>
tot_hab_cell<br>
The regime should be one of these strings:<br>
'BM III','P I','P II','Early P III','Late P III','P III'
violinplot.m - helper function to make a violin plot
<li>violinplot.m - helper function to make a violin plot\
</ol>
# References:
Ebisuzaki W. (1997) "A method to estimate the statistical significance of a correlation when
the data are serially correlated." J Climate, 10, 2147-2153).
Dakos, V., et al (2008). "Slowing down as an early warning signal for abrupt climate change."
Proceedings of the National Academy of Sciences 105(38): 14308-14312
Dakos, V., et al (2012)."Methods for Detecting Early Warnings of Critical Transitions in Time
Series Illustrated Using Simulated Ecological Data." PLoS ONE 7(7): e41010. doi:10.1371/journal.pone.0041010
<ul><li>Ebisuzaki W. (1997) "A method to estimate the statistical significance of a correlation when the data are serially correlated." J Climate, 10, 2147-2153).
<li>Dakos, V., et al. (2008). "Slowing down as an early warning signal for abrupt climate change." Proceedings of the National Academy of Sciences 105(38): 14308-14312
<li>Dakos, V., et al. (2012)."Methods for Detecting Early Warnings of Critical Transitions in Time Series Illustrated Using Simulated Ecological Data." PLoS ONE 7(7): e41010. doi:10.1371/journal.pone.0041010
<li>Scheffer, M., et al. (2021). "Loss of resilience preceded transformations of pre-Hispanic Pueblo societies". Proceedings of the National Academy of Sciences 118:e2024397118.
