How to change font size and font type in mplfinance title

Question

I have the following code:

from pandas_datareader import data as web
df = web.DataReader('goog','yahoo', start="2021-07-3", end="2021-09-12")
mpf.plot(df, style='charles', type = 'candle', volume=True, figratio=(12,8), title = "new title \n another title")

Could you please advise how can I change the font and size of newline another title?

Also, if I want to suppress the plot from being plotted in spyder/jupyter and just be saved how can I do that. Reason is RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory.

Answer 1

• As per How to edit the fig with the new mplfinance package, use returnfig=True to extract the fig and a list of axes objects.
• Then use standard matplotlib methods to add an axes title and a figure suptitle, because title in mpf.plot is actually the figure suptitle, not the axes title.
• As per this question, use fig.clf() to manage the RuntimeWarning if too many figures are created in a loop.
• References:
  • matplotlib.axes.Axes.set_title
  • matplotlib.pyplot.suptitle
  • matplotlib.text.Text for text properties like style

df = web.DataReader('goog','yahoo', start="2021-07-3", end="2021-09-12")
fig, axlist = mpf.plot(df, style='charles', type = 'candle', volume=True, figratio=(12,8), returnfig=True)

# add a new suptitle
fig.suptitle('Figure Title', y=1.05, fontsize=30, x=0.59)

# add a title the the correct axes
axlist[0].set_title('Axis Title', fontsize=25, style='italic', fontfamily='fantasy', loc='center')

# save the figure
fig.savefig('test.jpg', bbox_inches='tight')