javascript - start value in y-axis in HighChart -

javascript - start value in y-axis in HighChart -

i add together highchart project , want create chart it.i wrote code create chart temprature in monthes in cities:

function createchart() { chart = new highcharts.chart({ chart: { renderto: 'container', ype: 'line', //type: 'column', shadow: true, zoomtype: 'x', style: { fontfamily: 'tahoma' } }, title: { text: 'nima report', x: -20 //center }, labels: { items: { style: { fontfamily: 'tahoma' } }, style: { fontfamily: 'tahoma' } }, subtitle: { text: 'source: --', x: -20 }, xaxis: { categories: ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'], labels: { rotation: -45, align: 'right', formatter: function () { homecoming '<span style="font-size: 18px;">' + this.value + '</span>'; } } }, yaxis: { title: { text: 'temp' }, plotlines: [{ value: 0, width: 1, color: '#808080' }], labels: { align: 'right', formatter: function () { homecoming '<span style="font-size: 18px;font-weight: bold">' + this.value + '</span>'; } } }, tooltip: { crosshairs: [true, true], enabled: true, style: { fontfamily: "tahoma", textalign: "right" }, formatter: function () { homecoming '<b>' + this.series.name + '</b><br/>' + this.x + ': ' + this.y + '°c'; } }, legend: { layout: 'vertical', align: 'right', verticalalign: 'top', x: -10, y: 100, borderwidth: 0, labelformatter: function () { homecoming '<span style="font-family: tahoma">' + this.name + '</span>'; } }, series: [{ name: 'tokyo', data: [7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6] }, { name: 'new york', data: [0.2, 0.8, 5.7, 11.3, 17.0, 22.0, 24.8, 24.1, 20.1, 14.1, 8.6, 2.5] }, { name: 'berlin', data: [0.9, 0.6, 3.5, 8.4, 13.5, 17.0, 18.6, 17.9, 14.3, 9.0, 3.9, 1.0] }, { name: 'london', data: [3.9, 4.2, 5.7, 8.5, 11.9, 15.2, 17.0, 16.6, 14.2, 10.3, 6.6, 4.8] }] }); }

the problem when chart created y-axis start value -25 despite have not negative value.i want start zero how can set it? thanks

add min y-axis:

yaxis: { title: { text: 'temp' }, plotlines: [{ value: 0, width: 1, color: '#808080' }], labels: { align: 'right', formatter: function () { homecoming '<span style="font-size: 18px;font-weight: bold">' + this.value + '</span>'; } }, min:0, },

demo

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