score:1
Accepted answer
the data does not correspond to the category by its name, but by its array index.
so, with your categories array, the x value for "rnv-a" would be 0. "rnv-b" would be 1, "rnv-c" would be 2, and so on.
score:1
1) categories - you can use label formatter and check if it is number, http://api.highcharts.com/highstock#xaxis.labels.formatter
2) x value cannot be a string, it needs to be number. in case when you would like to have datetime type of chart, you can use pointstart / pointinterval, and then set tickinterval on xaxis (time in miliseconds)
Source: stackoverflow.com
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