linear_trend {NCC}

Generation of a linear trend that starts in a given period

Description

This function generates a time trend for given time points in the trial according to a linear function.

Usage

linear_trend(j, lambda, sample_size)

Arguments

j

Time points for which the trend should be generated.

lambda

Strength of time trend.

sample_size

Vector of dimension 2, indicating sample size in the trial period until the time trend starts and the remaining sample size.

Details

The time trend is generated according to the function f(j) = \lambda \cdot \frac{j-1}{N-1}, where N is the total sample size.

Value

Time trend for time points j.

Author(s)

Marta Bofill Roig, Pavla Krotka