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嘗試在我的數據集中的重要日期繪製垂直光線以突出顯示該日期之前/之後的趨勢。我知道如何繪製X軸不在日期時間內的光線,但是我一直在努力使x在datetime中的工作。下面是我的嘗試:當x軸處於日期時間時用散景繪製光線
from bokeh.plotting import figure, output_file, show
from datetime import datetime as dt
from math import pi
p = figure(title = 'stuff',
x_axis = 'date',
y_axis = datapoints,
x_axis_type = "datetime",
tools='pan, wheel_zoom, box_zoom, reset, resize, previewsave',
plot_width=1000)
#dates and data are lists containing datetime objects and y values
p.line(dates, data, line_width=1)
p.xaxis.major_label_orientation = pi/4
p.ray(x = dt(year, month, day), y = 0, length = 0, angle_units = "deg",
angle = 90, color = 'black')
output_file('data.html')
show(p)
這就產生了一個很長的堆棧跟蹤,並出現以下錯誤:
ValueError: expected an element of either String, Dict(String, Either(String, Instance(Transform), Instance(ColorMapper), Float)) or Float, got datetime.datetime(2014, 9, 18, 0, 0)
是當X軸爲日期時間這根本不支持,或者有我錯過了在文檔中的東西嗎?