TY  - CONF
AU  - Malović, Miodrag
AU  - Vukanić, Vera
AU  - Jevremović, Darko
AU  - Brajović, Ljiljana
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3384
AB  - Pearson’s and Spearman’s methods are most often used in popular software packages to calculate the correlation coefficient between two variables in natural sciences. The (1) difference between them is that the Pearson’s method takes actual numerical values into account whereas the Spearman’s operates with their ranks. Ranking is often efficient in dealing with nonlinearities and outliers in the data. However, not both independent (x) and outcome (y) variable have to be suitable for this. We propose not to rank the independent variable in case it comes sine-shaped. Most notable example of such a variable in nature is the temperature. It is sine-shaped due to day-night and summer-winter transitions. It does not contain many outliers, not only due to the shape, but also because it is often sampled at multiple points and averaged (to be linked with a single outcome variable observation). The proposed method is evaluated in simulations and with experimental data obtained in South Adriatic zooplankton research. Practical advices on how to apply it using popular software tools are given.
PB  - Institute of Electrical and Electronics Engineers Inc
C3  - Proccedings of  10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN), 05-08 June, East Sarajevo, Bosnia and Herzegovina 2023
T1  - Mixed Spearman’s Correlation Suitability for Sine-Shaped Independent Variables in Natural Sciences
DO  - 10.1109/IcETRAN59631.2023.10192143
ER  - 

@conference{
author = "Malović, Miodrag and Vukanić, Vera and Jevremović, Darko and Brajović, Ljiljana",
year = "2023",
abstract = "Pearson’s and Spearman’s methods are most often used in popular software packages to calculate the correlation coefficient between two variables in natural sciences. The (1) difference between them is that the Pearson’s method takes actual numerical values into account whereas the Spearman’s operates with their ranks. Ranking is often efficient in dealing with nonlinearities and outliers in the data. However, not both independent (x) and outcome (y) variable have to be suitable for this. We propose not to rank the independent variable in case it comes sine-shaped. Most notable example of such a variable in nature is the temperature. It is sine-shaped due to day-night and summer-winter transitions. It does not contain many outliers, not only due to the shape, but also because it is often sampled at multiple points and averaged (to be linked with a single outcome variable observation). The proposed method is evaluated in simulations and with experimental data obtained in South Adriatic zooplankton research. Practical advices on how to apply it using popular software tools are given.",
publisher = "Institute of Electrical and Electronics Engineers Inc",
journal = "Proccedings of  10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN), 05-08 June, East Sarajevo, Bosnia and Herzegovina 2023",
title = "Mixed Spearman’s Correlation Suitability for Sine-Shaped Independent Variables in Natural Sciences",
doi = "10.1109/IcETRAN59631.2023.10192143"
}

Malović, M., Vukanić, V., Jevremović, D.,& Brajović, L.. (2023). Mixed Spearman’s Correlation Suitability for Sine-Shaped Independent Variables in Natural Sciences. in Proccedings of  10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN), 05-08 June, East Sarajevo, Bosnia and Herzegovina 2023
Institute of Electrical and Electronics Engineers Inc..
https://doi.org/10.1109/IcETRAN59631.2023.10192143

Malović M, Vukanić V, Jevremović D, Brajović L. Mixed Spearman’s Correlation Suitability for Sine-Shaped Independent Variables in Natural Sciences. in Proccedings of  10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN), 05-08 June, East Sarajevo, Bosnia and Herzegovina 2023. 2023;.
doi:10.1109/IcETRAN59631.2023.10192143 .

Malović, Miodrag, Vukanić, Vera, Jevremović, Darko, Brajović, Ljiljana, "Mixed Spearman’s Correlation Suitability for Sine-Shaped Independent Variables in Natural Sciences" in Proccedings of  10th International Conference on Electrical, Electronic and Computing Engineering (IcETRAN), 05-08 June, East Sarajevo, Bosnia and Herzegovina 2023 (2023),
https://doi.org/10.1109/IcETRAN59631.2023.10192143 . .