Tag: aggregation

13 How to aggregate by minute data for a week into hourly means? 2011-02-15T21:00:59.150

12 Fast ways in R to get the first row of a data frame grouped by an identifier 2011-03-04T17:17:28.997

11 How to find summary statistics for all unique combinations of factors in a data.frame in R? 2010-08-16T13:23:52.747

11 Should I run separate regressions for every community, or can community simply be a controlling variable in an aggregated model? 2011-10-17T12:46:54.120

11 What statistics are preserved under aggregation? 2013-10-02T07:55:30.847

9 How do you choose a unit of analysis (level of aggregation) in a time series? 2011-02-16T14:47:53.653

8 Quantiles from the combination of normal distributions 2011-08-18T18:30:08.960

7 Intraclass correlation and aggregation 2010-08-13T12:44:23.913

7 Random Forest Probabilistic Prediction vs majority vote 2014-12-08T01:12:20.427

7 What techniques are there available for averaging misaligned multivariate time series? 2017-01-26T08:36:29.033

6 Measuring homogeneity across different spatial aggregations of data 2011-05-09T15:00:34.937

6 What is the terminology for data aggregated via summed totals versus data aggregated via means? 2015-05-28T15:37:38.360

6 Aggregation of Correlations Coefficients (Spearman) 2016-07-05T12:30:14.613

5 How to make a combination (aggregation) of quantile forecast? 2011-02-15T16:09:10.773

5 Clustering data into bins of variable sizes 2014-12-12T16:04:04.300

5 Is it possible to calculate Q1, Median, Q3, StDev from already aggregated data? 2015-05-12T13:05:59.170

5 Regression on large samples: can aggregation of the dependent variable by covariate pattern increase speed of estimation? 2015-08-07T23:15:34.767

5 How can I find the optimal weighting scheme to aggregate these estimates? 2015-11-12T12:50:33.033

5 How to combine regression models? 2016-01-14T13:58:29.223

4 Should percentages have decimal places? 2011-02-12T15:39:25.123

4 Is there a software package to fit grouped (aggregated) logistic panel regression models? 2012-07-02T20:33:11.247

4 Options for aggregating dispersion data 2013-01-31T21:54:37.910

4 Accuracy of aggregate vs. disaggregate forecasting 2014-05-20T17:29:34.427

4 Differences in correlation for individual and aggregated data 2015-05-05T16:38:32.267

4 Poisson regression on aggregated data with an interaction term 2016-03-09T12:40:24.800

4 What's aggregation bias, and how does it relate to the ecological fallacy? 2016-05-03T06:03:00.053

3 Getting aggregated share in R 2010-11-24T17:33:01.623

3 How to estimate measurement error on spatially autocorrelated gridded data when aggregating grid cells 2011-10-11T19:52:49.177

3 Forecast total for a year given monthly time series 2013-05-15T04:43:56.860

3 Can ecological inference problems be solved by fixed effects? 2013-09-29T09:26:18.313

3 Significance test across multiple simulated experiments 2013-11-07T02:40:18.163

3 Grouping sequential values in R 2014-07-10T20:21:50.467

3 Regression using aggregate (averaged) data 2014-11-19T20:26:04.090

3 Correlated time series at different aggregation levels 2015-03-28T09:17:40.793

3 Can Bootstrap aggregation be used with knn classifier? 2015-09-09T16:45:01.273

3 Why do regression models differ when aggregated data is taken into consideration? 2016-10-23T17:37:03.067

3 How to aggregate evaluation metrics from many evaluations? 2016-11-04T12:39:48.407

3 Is it legitimate to use AIC to compare models on the same data at different levels of aggregation? 2016-12-28T15:26:04.187

3 Best way to analyze if pairs of relocated endangered animals stick together after release? 2017-03-20T17:46:15.707

3 Privacy through moving averages? 2018-01-21T03:03:20.710

3 Regularized GLM with aggregated data 2018-02-19T09:36:52.420

3 Is it dangerous to take the mean of ratio measurements? 2018-03-01T11:25:53.147

2 Aggregation-Level in AB-Tests 2010-11-24T16:23:43.947

2 Calculating hourly volatility and peak-to-average ratio in R 2011-02-20T16:48:57.387

2 Aggregate opinions to a single measure 2012-01-23T21:47:08.457

2 Non-negative coefficient restriction in stacked regression 2012-03-04T02:56:51.013

2 When is it appropriate to pool data? 2012-06-22T16:32:38.293

2 Independence test with some aggregation 2012-07-23T16:49:06.763

2 When subject-based analysis is better than answer-based (and vice versa)? 2012-09-23T18:22:05.263

2 How to model the distribution over payouts from aggregate (sum) data? 2013-07-12T19:53:08.443

2 Standard errors in weighted least squares on aggregated data 2014-01-24T10:54:19.783

2 Power of t-test for aggregate data 2014-01-31T21:17:17.377

2 Variable Transformation using Cumulative Distribution Function (CDF) 2014-02-05T14:54:53.540

2 income elasticity + regression + household survey data 2014-06-13T15:15:07.337

2 rank data in subsets 2014-09-04T11:56:35.663

2 "Better fit" using aggregated data in comparison to disaggregated data: explanation? 2014-10-16T16:40:03.813

2 Aggregate variance for ordinary least squares? 2014-11-10T20:50:01.360

2 Aggregating forcast to higher spatial level 2014-11-21T14:51:49.743

2 Standard error for aggregated proportions 2014-12-22T14:35:55.687

2 Multinomial logit with aggregate data 2015-03-16T20:11:45.373

2 MAUP: correlation increases with aggregation, would error decrease? 2015-03-23T16:57:33.950

2 Correlating aggregated values between groups 2015-04-03T15:55:28.863

2 Machine learning tutorials / examples on data sets larger than a terabyte 2015-06-01T22:02:02.433

2 Is there any reason not to model group medians with a plain regression model? 2015-09-08T19:05:09.330

2 Combine confidence intervals for daily predictions from Poisson/Neg. Binomial GLMs 2015-09-14T07:05:27.770

2 Is there a model for machine learning on non-aggregated data, where we have a target variable, but also a grouping variable 2015-11-24T12:05:36.487

2 How to calculate pseudo R2 when using logistic regression on aggregated data files? 2015-11-26T10:12:15.363

2 Clustering, reducing number of levels of categorical variable 2016-04-25T15:39:34.480

2 when is measurement aggregation justified? 2016-10-12T23:53:13.713

2 ANOVA - Do I use raw or aggregate mean data to compare groups 2017-01-27T14:57:15.750

2 Aggregation of distributions: Independent vs. perfectly rank correlated 2017-02-17T19:37:05.167

2 Put Together Results from GLM Gamma Models 2017-06-19T21:48:27.320

2 Is County-Level Aggregation Sufficient To Anonymize? 2017-06-26T22:49:27.480

2 How do I meta-analyse means? 2017-08-17T08:12:03.660

2 Linear regression on aggregate and missing data 2017-12-05T06:30:55.923

1 R getting share of users with multiple of an element 2010-11-26T10:34:05.437

1 Subset data by month in R 2011-07-13T11:12:12.447

1 Using an If condition inside SPSS syntax 2011-08-24T13:11:01.323

1 Influences of scored/weighted ratings 2011-12-06T17:29:45.120

1 Measuring temporal aggregation 2011-12-17T09:36:28.640

1 Question about aggregated data and the effect on specific contributors 2012-01-23T03:00:35.407

1 Justification of aggregation in multi-level model - ICC in SPSS 2012-04-18T09:06:14.360

1 How to report Cronbach's alpha for referent-shift scale (before or after aggregation?) 2012-09-14T08:10:25.133

1 Using an aggregated outcome variable as contextual in multilevel analysis 2012-11-20T16:09:49.837

1 Compare means of 2 variables (no individual data available) 2012-11-24T22:36:11.387

1 What's the optimal way of measuring the error of quantitative estimates, across question sets? 2012-12-13T14:59:28.967

1 Data sufficiency -- determining from aggregate 2013-02-05T17:14:32.807

1 Emulate correlation in loss data during aggregation 2013-05-27T13:35:42.960

1 variance of summation/compound variable? 2013-10-10T20:48:01.520

1 Aggregating two categorical variables 2013-12-16T13:43:33.680

1 Ok to use different levels of aggregation for different prediction periods? 2014-05-05T19:48:56.060

1 Bagging for sparse survey data regression? 2015-01-06T09:54:28.803

1 Correlation with aggregated data 2015-01-14T18:12:35.173

1 How to reconstruct moments from aggregated data? 2015-07-02T20:30:29.080

1 Taming large datasets. How to keep historical data with aggregation techniques? 2015-07-15T19:04:25.653

1 Aggregating standard deviation to a summary point 2015-11-26T13:28:10.783

1 When would you want to reduce variance? 2016-01-12T03:27:03.983

1 simple statistics of aggregated posterior data after ensemble data assimilation 2016-01-28T11:07:50.970

1 Pearson correlation after aggregation 2016-03-24T09:58:32.940