grainproduct: Dataset of grain production in chapter12

Description Usage Format

Description

A dataset containing year,Y,L,M,K 5 variables of 27 objects

Usage

1

Format

a dataframe with 27 rows and 5 variables

year

time

Y

output

L

labor population

M

area

K

chemical fertilizer


zhaoxue-xmu/RDA documentation built on May 4, 2019, 10:17 p.m.