Home/ Questions/Q 9279913
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-18T17:44:42+00:00

In the reproducible code below (last line), the ‘update’ function doesn’t work if I

  • 0

In the reproducible code below (last line), the ‘update’ function doesn’t work if I replace ‘Income’ with ‘fieldToRemove’. How can I make this function work? I need to run that line in loop. 

state.x77                          
tmpData = as.data.frame(state.x77) 
colnames(tmpData)[4] = "Life.Exp"  
colnames(tmpData)[6] = "HS.Grad"
cnames = colnames(tmpData)
cnames
lenCnames = length(cnames)

rhsOfFormula = paste(cnames[1:(length(cnames)-1)],collapse= "+")
lhsOfFormula = cnames[length(cnames)]
(fmla <- as.formula(paste(lhsOfFormula , " ~ ", rhsOfFormula )) )
modelTmp <- glm(formula = fmla, data=tmpData)

fieldToRemove = 'Income'
newModel <- update(modelTmp, .~.-Income )
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    update expects a formula as the second argument, so you have to use the same trick you used earlier: as.formula:

    newModel <- update(modelTmp, as.formula(paste(".~.-", fieldToRemove)) )
    • 0