solve_nfg_fcn() finds the pair of best responses when
payoff functions are provided as R functions.
solve_nfg_fcn(
  game,
  par_label = NULL,
  cons1 = NULL,
  cons2 = NULL,
  cons_common = NULL,
  precision = 1L,
  plot = TRUE,
  mark_NE = FALSE,
  quietly = FALSE,
  color_palette = "Set1"
)A "normal_form" class object created by normal_form().
A vector of parameter labels if the user define the game with functions as characters.
A named list of parameters contained in
game$payoff$payoffs1 that should be treated as constants, if any.
A named list of parameters contained in
game$payoff$payoffs2 that should be treated as constants, if any.
A named list of parameters contained in
game$payoff$payoffs1 and game$payoff$payoffs2 that should
be treated as constants, if any. If cons1 and cons2 are
exactly same, you can specify cons_common instead of specifying
both cons1 and cons2.
A natural number specifying the precision of numerical approximation. The value n approximately means that the approximation is correct up to the Nth decimal place. The default value is 1.
A logical value to determine whether the figure of the best
response correspondences will be displayed. Default is TRUE.
A logical value to control if the NE (if any) will be marked
in the best response plot, which will be displayed (only displayed when
plot = TRUE). Default is FALSE.
A logical value to determine if the equilibrium will be kept
in the returned list  without being printed on screen. Default is
FALSE.
A color palette to be used. Default is "Set1".
A list containing the pair of the best response correspondence (NE) and the plot of best response correspondences.