Trajectary For A Buoy Flow In The Tasman Sea With Tail

Im trying to make a plot the path of a buoy in the tasman sea. I got the buoy flowing around but I cannot find how i can give it a tail of the previous 5 steps. fig, ax = plt.subp

Solution 1:

You could slice the current location plus the five previous locations from the data, e.g. for step i you plot data[i:i+5]. You need to handle beginning and end of the data.

import numpy as np
from matplotlib import pyplot as plt
from matplotlib import animation

# First set up the figure, the axis, and the plot element we want to animate
fig = plt.figure()
ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
line, = ax.plot([], [], lw=2)

ax.set_xlim(0, 100)

x = np.arange(100)
y = np.random.rand(100)

# initialization function: plot the background of each framedefinit():
    line.set_data([], [])
    return line,

# animation function.  This is called sequentiallydefanimate(i):

    _x = x[i: i+5]
    _y = y[i: i+5]
    print(_x,_y)
    line.set_data(_x, _y)
    return line,

# call the animator.  blit=True means only re-draw the parts that have changed.
anim = animation.FuncAnimation(fig, animate, init_func=init,
                               frames=200, interval=20, blit=True)


plt.show()

Example from https://jakevdp.github.io/blog/2012/08/18/matplotlib-animation-tutorial/