Perguntas com a marcação «cluster-sample»

15
A precisão da máquina de aumento de gradiente diminui à medida que o número de iterações aumenta

Estou experimentando o algoritmo da máquina de aumento de gradiente através do caretpacote em R. Usando um pequeno conjunto de dados de admissões de faculdade, executei o seguinte código: library(caret) ### Load admissions dataset. ### mydata <-

machine-learning caret boosting gbm hypothesis-testing t-test panel-data psychometrics intraclass-correlation generalized-linear-model categorical-data binomial model intercept causality cross-correlation distributions ranks p-value z-test sign-test time-series references terminology cross-correlation definition probability distributions beta-distribution inverse-gamma missing-data paired-comparisons paired-data clustered-standard-errors cluster-sample time-series arima logistic binary-data odds-ratio medicine hypothesis-testing wilcoxon-mann-whitney unsupervised-learning hierarchical-clustering neural-networks train clustering k-means regression ordinal-data change-scores machine-learning experiment-design roc precision-recall auc stata multilevel-analysis regression fitting nonlinear jmp r data-visualization gam gamm4 r lme4-nlme many-categories regression causality instrumental-variables endogeneity controlling-for-a-variable
8
Encontre distribuição e transforme em distribuição normal

Eu tenho dados que descrevem com que frequência um evento ocorre durante uma hora ("número por hora", nph) e quanto tempo os eventos duram ("duração em segundos por hora", dph). Estes são os dados originais: nph <- c(2.50000000003638, 3.78947368414551, 1.51456310682008, 5.84686774940732,...

normal-distribution data-transformation logistic generalized-linear-model ridge-regression t-test wilcoxon-signed-rank paired-data naive-bayes distributions logistic goodness-of-fit time-series eviews ecm panel-data reliability psychometrics validity cronbachs-alpha self-study random-variable expected-value median regression self-study multiple-regression linear-model forecasting prediction-interval normal-distribution excel bayesian multivariate-analysis modeling predictive-models canonical-correlation rbm time-series machine-learning neural-networks fishers-exact factorisation-theorem svm prediction linear reinforcement-learning cdf probability-inequalities ecdf time-series kalman-filter state-space-models dynamic-regression index-decomposition sampling stratification cluster-sample survey-sampling distributions maximum-likelihood gamma-distribution