I plotted 3 histograms using facet view and added vlines for mean and median. I would like to add a legend to indicate which vline refers to which statistic. ggplot(x, aes(x=earnw)) + geom_his...

Here is my code: import matplotlib.pyplot as plt import matplotlib.dates as mdates import datetime import numpy as np fig, ax = plt.subplots(1,1) sample_dates = np.array([datetime.datetime(2000,1,...

I need to play multiple video for test a video server. I'm using lubuntu 14.04 and have installed V4l2loopback to make the device file ( /dev/videoN ) I am using mplayer to play video from this de...