iqLearn (version 1.5)

summary.qLearnS1: Q-learning: first-stage regression summary

Description

Output from the first-stage regression in Q-learning.

Usage

# S3 method for qLearnS1
summary(object, ...)

Arguments

object

object of type qLearnS1

...

additional arguments to be passed to summary()

Value

Computes and returns multiple summary statistics from the linear model in object. See summary.lm for a list of available summary statistics.

Details

Regression output and other summary statistics from the second-stage regression. See summary.lm for more details.

References

Linn, K. A., Laber, E. B., Stefanski, L. A. (2015) "iqLearn: Interactive Q-Learning in R", Journal of Statistical Software, 64(1), 1--25.

Laber, E. B., Linn, K. A., and Stefanski, L. A. (2014) "Interactive model building for Q-learning", Biometrika, 101(4), 831-847.

See Also

qLearnS1

Examples

# NOT RUN {
## load in two-stage BMI data
data (bmiData)
bmiData$A1[which (bmiData$A1=="MR")] = 1
bmiData$A1[which (bmiData$A1=="CD")] = -1
bmiData$A2[which (bmiData$A2=="MR")] = 1
bmiData$A2[which (bmiData$A2=="CD")] = -1
bmiData$A1 = as.numeric (bmiData$A1)
bmiData$A2 = as.numeric (bmiData$A2)
s1vars = bmiData[,1:4]
s2vars = bmiData[,c (1, 3, 5)]
a1 = bmiData[,7]
a2 = bmiData[,8]
## define response y to be the negative 12 month change in BMI from
## baseline 
y = -(bmiData[,6] - bmiData[,4])/bmiData[,4]
## second-stage regression
fitQ2 = qLearnS2 (y ~ gender + parent_BMI + month4_BMI +
  A2*(parent_BMI + month4_BMI), data=bmiData, "A2", c("parent_BMI",
  "month4_BMI"))                                     
## first-stage regression                                   
fitQ1 = qLearnS1 (fitQ2, s1vars, a1, c(3,4))
fitQ1 = qLearnS1 (~ gender + race + parent_BMI + baseline_BMI +
  A1*(gender + parent_BMI), data=bmiData, "A1", c ("gender",
                              "parent_BMI"), fitQ2)
summary (fitQ1)
# }