Published
Edited
Apr 23, 2021
dataPayoffs = {
const dp = 0.05
const data = []
const listProbHawkPlayer2 = [0.1, pHawk, ratio, 0.9]
for (let pH1 = 0; pH1 <= 1; pH1 += dp) {
for (let pH2 of listProbHawkPlayer2) {
data.push({
pH1,
label: `${pH2.toPrecision(2)}${pH2 == ratio ? ' = G/C' : ''}`,
payoff: getMixedPayoff(pH1, pH2)
})
}
}
return data
}
data2d = {
const dp = 0.05
const data = []
for (let pH1 = 0; pH1 <= 1; pH1 += dp) {
for (let pH2 = 0; pH2 <= 1; pH2 += dp) {
data.push({
pH1,
pH2,
payoff: getMixedPayoff(pH1, pH2)
})
}
}
return data
}
dataFitness = {
const data = []
for (let pHawks = 0; pHawks <= 1; pHawks += 0.01) {
[H, D].forEach(X => {
data.push({
pHawks,
fitness: getFitness(X, pHawks),
type: X === H ? "Hawk" : "Dove"
});
});
}
return data
}
function getFitness(X, pHawks) {
if (X == H) {
return pHawks * a + (1 - pHawks) * b
}
return pHawks * c + (1 - pHawks) * d
}
function getMixedFitness(probPlayHawk, pHawks) {
return probPlayHawk * getFitness(H, pHawks) + (1 - probPlayHawk) * getFitness(D, pHawks)
}
function getMixedPayoff(p, q) {
// p prob of player 1 playing hawk
// q prob of player 2 playing hawk
const hawk_hawk = p * q * a
const hawk_dove = p * (1 - q) * b
const dove_hawk = (1 - p) * q * c
const dove_dove = (1 - p) * (1 - q) * d
return hawk_hawk + hawk_dove + dove_hawk + dove_dove
}
function getPayoff(p1, p2) {
if (p1 == H) {
return p2 == H ? a : b
} else {
return p2 == H ? c : d
}
}
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