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/ Estimate models with groups of variables.R
Last active
June 23, 2018 21:15
Estimate models with groups of variables
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| # Create sample data | |
| set.seed(1) | |
| data <- data.frame(y = rnorm(10), | |
| a = rnorm(10), | |
| b = rnorm(10), | |
| c = rnorm(10), | |
| d = rnorm(10)) | |
| # Function takes a string |
bgall
/ sample_selection_bias
Created
February 14, 2018 19:42
Conditioning on the dependent variable changes the L in LATE
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| # Load packages | |
| library(dplyr) | |
| # Create data | |
| set.seed(1) | |
| x <- rnorm(1000000, mean = 0, sd = 1) | |
| y <- x*x | |
| full <- data.frame(x, y) |
bgall
/ r_na_examples
Last active
July 6, 2017 18:32
Demonstrates the idiosyncratic behavior of NA values in R
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| # The below demonstrates the madness of R's treatment of NA values. | |
| # Some examples taken from https://stackoverflow.com/questions/25100974/na-matches-na-but-is-not-equal-to-na-why/25101796 | |
| # Logical examples | |
| NA %in% NA | |
| # [1] TRUE | |
| NA == NA |
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