Created
March 11, 2017 18:51
-
-
Save dgrtwo/061f70cc65e55abba98df81c9c3f60f6 to your computer and use it in GitHub Desktop.
Code from this tweet: https://twitter.com/drob/status/840636042470400000
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
library(tidyverse) | |
library(broom) | |
library(scales) | |
theme_set(theme_minimal()) | |
crossing(n = round(10 ^ seq(1, 7, .1)), | |
delta = 10 ^ seq(-1, -3, -1), | |
sig.level = .05, | |
sd = .3) %>% | |
invoke(power.t.test, ., type = "one.sample") %>% | |
tidy() %>% | |
ggplot(aes(n, power, color = percent(delta))) + | |
geom_line() + | |
geom_hline(lty = 2, yintercept = .9) + | |
scale_x_log10(labels = comma_format()) + | |
scale_y_continuous(labels = percent_format()) + | |
labs(x = "Number of observations (log scale)", | |
y = "Power of one-sample t-test", | |
color = "Effect size", | |
title = "Power of one-sample t-test depending on sample size", | |
subtitle = "Standard deviation = .3; dashed line shows power = 90%") |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment