How can I increase space below axis for long date strings?

Question

Please look at the picture and let me know if there is an option to increase the margin/border of this image to accommodate for the long date/time string.

Answer 1

you can set grid option can achieve this goal:

grid.containLabel = true

if you like, can also set:

grid.bottom = 0

for example:

    option = {
    xAxis: {
        type: 'category',
        axisLabel: {
            interval: 1,
            rotate: 45
        },
        data: ['2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04', '2018-06-07 14:27:04']
    },
    yAxis: {
        type: 'value'
    },
    grid: {
        bottom: 0,
        containLabel: true
    },
    series: [{
        data: [820, 932, 901, 934, 1290, 1330, 1320, 820, 932, 901, 934, 1290, 1330, 1320, 820, 932, 901, 934, 1290, 1330, 1320, 820, 932, 901, 934, 1290, 1330, 1320,820, 932, 901, 934, 1290, 1330, 1320],
        type: 'line',
        smooth: true
    }]
};

result: