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• W2511892808 abstract "The Random Forest (RF) algorithm for supervised machine learning is an ensemble learning method widely used in science and many other fields. Its popularity has been increasing, but relatively few studies address the parameter selection process: a critical step in model fitting. Due to numerous assertions regarding the performance reliability of the default parameters, many RF models are fit using these values. However there has not yet been a thorough examination of the parameter-sensitivity of RFs in computational genomic studies. We address this gap here. We examined the effects of parameter selection on classification performance using the RF machine learning algorithm on two biological datasets with distinct p/n ratios: sequencing summary statistics (low p/n) and microarray-derived data (high p/n). Here, p, refers to the number of variables and, n, the number of samples. Our findings demonstrate that parameterization is highly correlated with prediction accuracy and variable importance measures (VIMs). Further, we demonstrate that different parameters are critical in tuning different datasets, and that parameter-optimization significantly enhances upon the default parameters. Parameter performance demonstrated wide variability on both low and high p/n data. Therefore, there is significant benefit to be gained by model tuning RFs away from their default parameter settings." @default.
• W2511892808 created "2016-09-16" @default.
• W2511892808 creator A5007657275 @default.
• W2511892808 creator A5076600645 @default.
• W2511892808 date "2016-09-01" @default.
• W2511892808 modified "2023-10-18" @default.
• W2511892808 title "The parameter sensitivity of random forests" @default.
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• W2511892808 doi "https://doi.org/10.1186/s12859-016-1228-x" @default.
• W2511892808 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5009551" @default.
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