get_power_table | R Documentation |
Create a power table for a combination of parameter values
get_power_table(object, n2, ..., df = "between", alpha = 0.05,
R = 1L, cores = 1L)
object |
An object created by |
n2 |
A vector of n2 values |
... |
Optional named arguments. Up to two extra arguments can be compared. When used together with the plot method, the first argument will be grouped by color and the second by facets. |
df |
Either "between" or "satterth" for Satterthwaite's DF approximation.
Also accepts a |
alpha |
The alpha level, defaults to 0.05. |
R |
An |
cores |
An |
A data.frame
with class plcp_power_table
.
paras <- study_parameters(n1 = 11,
n2 = 10,
n3 = 6,
T_end = 10,
icc_pre_subject = 0.5,
icc_pre_cluster = 0,
var_ratio = 0.03,
icc_slope = 0.05,
cohend = -0.8)
# increase only n2
x <- get_power_table(paras, n2 = 10:15)
plot(x)
# Compare two parameters
x <- get_power_table(paras, n2 = 10:15, n3 = 6:8)
plot(x)
# Compare impact of three parameters
x <- get_power_table(paras, n2 = seq(3, 25, by = 3),
n3 = c(3,6,9),
icc_slope = c(0, 0.05, 0.1))
plot(x)
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