sb: Spatial balance

In jlisic/BalancedSampling: Balanced and Spatially Balanced Sampling

Description

Calculates spatial balance of a sample subject to inclusion probabilities and auxiliary space

Usage

sb(p,x,s)	

Arguments

p	vector of length N with inclusion probabilities
x	matrix of (standardized) auxiliary variables of N rows and q columns
s	the sample, vector of length n

Value

Number, the spatial balance

References

Grafstr<c3><b6>m, A., Lundstr<c3><b6>m, N.L.P. and Schelin, L. (2012). Spatially balanced sampling through the Pivotal method. Biometrics 68(2), 514-520.

Examples

## Not run: 
# check spatial balance
set.seed(1234567);
N = 500;
n = 70;
p = rep(n/N,N);
X = cbind(runif(N),runif(N));

# select lpm1 sample
s = lpm1(p,X);
# calculate balance
B = sb(p,X,s);


## End(Not run)

jlisic/BalancedSampling documentation built on May 19, 2019, 12:46 p.m.