Function to graphically display chi2 test results to ID confounders. Requires a data frame with outcome and exposures such as the one provided by the chi.2.eksp function. Returns a list of network objects in pdf
| 1 2 | chi.confounder.net(df, outcome = "outcome", exposure = "exposure",
  outdir = "graphs/", stoor = TRUE, remPiq = FALSE)
 | 
| df | Data frame containing outcomes and exposures | 
| outcome | Character vector referring to the name of the outcome column | 
| exposure | Character vector referring to the name of the exposure column | 
| outdir | Character vector containing to output directory | 
| stoor | Logical that stores the file as pdf when TRUE | 
| Logical | that removes "Piqola_" from outcomes and exposures when TRUE | 
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