آموزش r برای دانشجویان روانشناسی
ایجاد اعداد تصادفی در R
Set seed in R
set.seed() function in R Language is used to create random numbers which can be reproduced. It helps in creating same random numbers each time a random function is called. This helps in creating repeatable data sets for a analysis.
Example 1:
# R program to create repeatable data sets
# Setting seeds
set.seed(10)
# Creating data set of random values
x <- rnorm(15)
x
# Setting seed again for another data set
set.seed(10)
# Creating another data set
y <- rnorm(15)
y
# Checking if both are equal
identical(x, y)
#output
[1] 0.01874617 -0.18425254 -1.37133055 -0.59916772 0.29454513 0.38979430
[7] -1.20807618 -0.36367602 -1.62667268 -0.25647839 1.10177950 0.75578151
[13] -0.23823356 0.98744470 0.74139013
[1] 0.01874617 -0.18425254 -1.37133055 -0.59916772 0.29454513 0.38979430
[7] -1.20807618 -0.36367602 -1.62667268 -0.25647839 1.10177950 0.75578151
[13] -0.23823356 0.98744470 0.74139013
[1] TRUE
Example 2:
# R program to create repeatable data sets
# Setting seeds
set.seed(10)
# Creating data set of random values
x <- rexp(15)
x
# Setting seed again for another data set
set.seed(10)
# Creating another data set
y <- rexp(15)
y
# Checking if both are equal
identical(x, y)
#output
[1] 0.01495641 0.92022120 0.75215894 1.57504185 0.23165862 1.08667300
[7] 2.32762287 0.72912382 1.28831010 0.67226829 0.42652979 1.11542195
[13] 1.31654707 0.41329383 0.67657533
[1] 0.01495641 0.92022120 0.75215894 1.57504185 0.23165862 1.08667300
[7] 2.32762287 0.72912382 1.28831010 0.67226829 0.42652979 1.11542195
[13] 1.31654707 0.41329383 0.67657533
[1] TRUE
[1] 5.6
منبع
https://www.geeksforgeeks.org/generate-data-sets-of-same-random-values-in-r-programming-set-seed-function/
دوره های آموزشی ما برای کنکور ارشد و دکتری رشته های روانشناسی، مشاوره، علوم تربیتی، پرستاری, مدیریت آموزشی و علوم شناختی کاربرد دارد.