Minimum value for y-axis in Vega lite - vega-lite

Question

I have a line chart with stock ticks based on this examples: https://vega.github.io/vega-lite/examples/interactive_multi_line_pivot_tooltip.html
I'm trying to set a min. val. for the y-axis and have tried the below:
"encoding": {
"x": {
"field": "date",
"type": "temporal"
},
"y": {
"field": "price",
"type": "quantitative",
"scale": {"domain": [150,350]},
},
},
This works with negative values like -150 but not positive. Also my tooltip disappears when setting the y variables..

Answer 1

Setting the scale domain appears to work with the example you linked to (editor):
{
"$schema": "https://vega.github.io/schema/vega-lite/v4.json",
"data": {"url": "data/stocks.csv"},
"width": 400,
"height": 300,
"encoding": {"x": {"field": "date", "type": "temporal"}},
"layer": [
{
"encoding": {
"color": {"field": "symbol", "type": "nominal"},
"y": {
"field": "price",
"type": "quantitative",
"scale": {"domain": [100, 500]}
}
},
"layer": [
{"mark": {"type": "line", "clip": true}},
{
"transform": [{"filter": {"selection": "hover"}}],
"mark": {"type": "point", "clip": true}
}
]
},
{
"transform": [{"pivot": "symbol", "value": "price", "groupby": ["date"]}],
"mark": "rule",
"encoding": {
"opacity": {
"condition": {"value": 0.3, "selection": "hover"},
"value": 0
},
"tooltip": [
{"field": "AAPL", "type": "quantitative"},
{"field": "AMZN", "type": "quantitative"},
{"field": "GOOG", "type": "quantitative"},
{"field": "IBM", "type": "quantitative"},
{"field": "MSFT", "type": "quantitative"}
]
},
"selection": {
"hover": {
"type": "single",
"fields": ["date"],
"nearest": true,
"on": "mouseover",
"empty": "none",
"clear": "mouseout"
}
}
}
]
}
Note that I also set the clip mark property to hide marks outside the axis boundaries.