package timedata import ( "math" "sort" "time" "github.com/cointop-sh/cointop/pkg/humanize" ) // ResampleTimeSeriesData resamples the given [timestamp,value] data to numsteps between start-end (returns numSteps+1 points). // If the data does not extend past start/end then there will likely be NaN in the output data. func ResampleTimeSeriesData(data [][]float64, start float64, end float64, numSteps int) [][]float64 { var newData [][]float64 l := len(data) step := (end - start) / float64(numSteps) for pos := start; pos <= end; pos += step { idx := sort.Search(l, func(i int) bool { return data[i][0] >= pos }) var val float64 if idx == 0 { if data[0][0] == pos { val = data[0][1] // exactly left } else { val = math.NaN() // off the left } } else if idx == l { val = math.NaN() // off the right } else { // between two points - linear interpolation left := data[idx-1] right := data[idx] dvdt := (right[1] - left[1]) / (right[0] - left[0]) val = left[1] + (pos-left[0])*dvdt } newData = append(newData, []float64{pos, val}) } return newData } // CalculateTimeQuantum determines the given [timestamp,value] data func CalculateTimeQuantum(data [][]float64) time.Duration { if len(data) > 1 { minTime := time.UnixMilli(int64(data[0][0])) maxTime := time.UnixMilli(int64(data[len(data)-1][0])) return time.Duration(int64(maxTime.Sub(minTime)) / int64(len(data)-1)) } return 0 } // BuildTimeSeriesLabels returns a list of short labels representing time values from the given [timestamp,value] data func BuildTimeSeriesLabels(data [][]float64) []string { minTime := time.UnixMilli(int64(data[0][0])) maxTime := time.UnixMilli(int64(data[len(data)-1][0])) timeRange := maxTime.Sub(minTime) var timeFormat string if timeRange.Hours() < 24 { timeFormat = "15:04" } else if timeRange.Hours() < 24*7 { timeFormat = "Mon 15:04" } else if timeRange.Hours() < 24*365 { timeFormat = "02-Jan" } else { timeFormat = "Jan 2006" } var labels []string for i := range data { labelTime := time.UnixMilli(int64(data[i][0])) labels = append(labels, humanize.FormatTime(labelTime, timeFormat)) } return labels }