Pertanyaan yang diberi tag linear-model

29
Cara menangani data hierarkis / bersarang dalam pembelajaran mesin

Saya akan menjelaskan masalah saya dengan sebuah contoh. Misalkan Anda ingin memprediksi penghasilan seseorang yang diberikan beberapa atribut: {Usia, Jenis Kelamin, Negara, Wilayah, Kota}. Anda memiliki dataset pelatihan seperti itu train <- data.frame(CountryID=c(1,1,1,1, 2,2,2,2, 3,3,3,3),...

regression machine-learning multilevel-analysis correlation dataset spatial paired-comparisons cross-correlation clustering aic bic dependent-variable k-means mean standard-error measurement-error errors-in-variables regression multiple-regression pca linear-model dimensionality-reduction machine-learning neural-networks deep-learning conv-neural-network computer-vision clustering spss r weighted-data wilcoxon-signed-rank bayesian hierarchical-bayesian bugs stan distributions categorical-data variance ecology r survival regression r-squared descriptive-statistics cross-section maximum-likelihood factor-analysis likert r multiple-imputation propensity-scores distributions t-test logit probit z-test confidence-interval poisson-distribution deep-learning conv-neural-network residual-networks r survey wilcoxon-mann-whitney ranking kruskal-wallis bias loss-functions frequentist decision-theory risk machine-learning distributions normal-distribution multivariate-analysis inference dataset factor-analysis survey multilevel-analysis clinical-trials
28
Menghitung pengulangan efek dari model lmer

Saya baru saja menemukan makalah ini , yang menjelaskan bagaimana menghitung pengulangan (alias reliabilitas, alias korelasi intraclass) dari pengukuran melalui pemodelan efek campuran. Kode R adalah: #fit the model fit = lmer(dv~(1|unit),data=my_data) #obtain the variance estimates vc =...

mixed-model reliability intraclass-correlation repeatability spss factor-analysis survey modeling cross-validation error curve-fitting mediation correlation clustering sampling machine-learning probability classification metric r project-management optimization svm python dataset quality-control checking clustering distributions anova factor-analysis exponential poisson-distribution generalized-linear-model deviance machine-learning k-nearest-neighbour r hypothesis-testing t-test r variance levenes-test bayesian software bayesian-network regression repeated-measures least-squares change-scores variance chi-squared variance nonlinear-regression regression-coefficients multiple-comparisons p-value r statistical-significance excel sampling sample r distributions interpretation goodness-of-fit normality-assumption probability self-study distributions references theory time-series clustering econometrics binomial hypothesis-testing variance t-test paired-comparisons statistical-significance ab-test r references hypothesis-testing t-test normality-assumption wilcoxon-mann-whitney central-limit-theorem t-test data-visualization interactive-visualization goodness-of-fit
27
Bisakah derajat kebebasan menjadi angka non-integer?

Ketika saya menggunakan GAM, itu memberi saya sisa DF adalah (baris terakhir dalam kode). Apa artinya? Melampaui contoh GAM, Secara umum, bisakah jumlah derajat kebebasan menjadi angka yang bukan bilangan bulat?26.626.626.6 > library(gam) > summary(gam(mpg~lo(wt),data=mtcars)) Call:...

r degrees-of-freedom gam machine-learning pca lasso probability self-study bootstrap expected-value regression machine-learning linear-model probability simulation random-generation machine-learning distributions svm libsvm classification pca multivariate-analysis feature-selection archaeology r regression dataset simulation r regression time-series forecasting predictive-models r mean sem lavaan machine-learning regularization regression conv-neural-network convolution classification deep-learning conv-neural-network regression categorical-data econometrics r confirmatory-factor scale-invariance self-study unbiased-estimator mse regression residuals sampling random-variable sample probability random-variable convergence r survival weibull references autocorrelation hypothesis-testing distributions correlation regression statistical-significance regression-coefficients univariate categorical-data chi-squared regression machine-learning multiple-regression categorical-data linear-model pca factor-analysis factor-rotation classification scikit-learn logistic p-value regression panel-data multilevel-analysis variance bootstrap bias probability r distributions interquartile time-series hypothesis-testing normal-distribution normality-assumption kurtosis arima panel-data stata clustered-standard-errors machine-learning optimization lasso multivariate-analysis ancova machine-learning cross-validation
24
Bayesian laso vs laso biasa

Perangkat lunak implementasi yang berbeda tersedia untuk laso . Saya tahu banyak membahas tentang pendekatan bayesian vs pendekatan frequentist di berbagai forum. Pertanyaan saya sangat spesifik untuk laso - Apa perbedaan atau kelebihan dari baysian laso vs laso biasa ? Berikut adalah dua contoh...

r machine-learning linear-model lasso