{
"$schema": "https://vega.github.io/schema/vega-lite/v5.json",
"description": "Poisson Distribution PMF for different lambda values",
"data": {
"sequence": {
"start": 0,
"stop": 20,
"step": 1,
"as": "k"
}
},
"transform": [
{
"calculate": "exp(-2) * pow(2, datum.k) / factorial(datum.k)",
"as": "y1"
},
{
"calculate": "exp(-5) * pow(5, datum.k) / factorial(datum.k)",
"as": "y2"
},
{
"calculate": "exp(-10) * pow(10, datum.k) / factorial(datum.k)",
"as": "y3"
}
],
"hconcat": [
{
"width": 250,
"height": 200,
"title": "λ = 2",
"mark": "bar",
"encoding": {
"x": {
"field": "k",
"type": "ordinal",
"title": "Number of Events"
},
"y": {
"field": "y1",
"type": "quantitative",
"title": "Probability"
},
"color": {
"value": "#004976"
}
}
},
{
"width": 250,
"height": 200,
"title": "λ = 5",
"mark": "bar",
"encoding": {
"x": {
"field": "k",
"type": "ordinal",
"title": "Number of Events"
},
"y": {
"field": "y2",
"type": "quantitative",
"title": "Probability"
},
"color": {
"value": "#7A0045"
}
}
},
{
"width": 250,
"height": 200,
"title": "λ = 10",
"mark": "bar",
"encoding": {
"x": {
"field": "k",
"type": "ordinal",
"title": "Number of Events"
},
"y": {
"field": "y3",
"type": "quantitative",
"title": "Probability"
},
"color": {
"value": "#486300"
}
}
}
]
}