Figure 5-20. Candlestick chart for financial data
In the preceding code, plt.setp(plt.gca().get_xticklabels(), rotation=30) grabs
the x-axis labels and rotates them by 30 degrees. To this end, the function plt.gca is used,
which returns the current figure object. The method call of get_xticklabels then
provides the tick labels for the x-axis of the figure.
Table 5-6 provides a description of the different parameters the mpf.candlestick function
takes.
Table 5-6. Parameters for mpf.candlestick
Parameter Description
ax
An Axes instance to plot to
quotes
Financial data to plot (sequence of time, open, close, high, low sequences)
width
Fraction of a day for the rectangle width
colorup
The color of the rectangle where close >= open
colordown
The color of the rectangle where close < open
alpha
The rectangle alpha level
A rather similar plot type is provided by the plot_day_summary function, which is used in
the same fashion as the candlestick function and with similar parameters. Here, opening
and closing values are not illustrated by a colored rectangle but rather by two small
horizontal lines, as Figure 5-21 shows:
In [ 29 ]: fig, ax = plt.subplots(figsize=( 8 , 5 ))
mpf.plot_day_summary(ax, quotes, colorup=‘b’, colordown=‘r’)
