
from matplotlib import pyplot as plt
import numpy as np

# with a dark mode theme
#from jupyterthemes import jtplot
#jtplot.style(theme='oceans16')


def myplot(xs=(1,2,3), ys=(4,3,7), a=1.0, b=0.0):
    """ Make a scatterplot of points xs=[x0,x1,...] and ys=[y0,y1,..]
        and a line (a*x + b) . """
    plt.figure(dpi=220, figsize=(5,3)) # dots-per-inch; size in inches
    plt.xlabel('x'); plt.ylabel('y')
    # label is for adding a legend if more than one set of data on plot
    
    plt.scatter(xs, ys, s=2, c='blue', label='scatter') # s=size, c=color
    #plt.semilogy(xs, ys, s=2, c='blue', label='scatter') # s=size, c=color
    
    #x_line = (xlo, xhi) = (min(xs), max(xs))
    #y_line = (a*xlo+b, a*xhi+b)
    #plt.plot(x_line, y_line, color='green', linewidth=1.0, label=f'y={a}x+{b}')


x = list(range(2,50))
y = [
 2.0,
 2.0,
 2.0,
 2.0,
 1.96875,
 1.9047619047619047,
 1.825,
 1.7442922374429224,
 1.6701570680628273,
 1.6050156739811912,
 1.548828125,
 1.5006305170239596,
 1.4592436974789915,
 1.4235531241002015,
 1.3925970873786409,
 1.3655773420479302,
 1.3418421612422888,
 1.320862396956246,
 1.3022083533365338,
 1.2855299539170506,
 1.2705405792945226,
 1.2570042039330755,
 1.2447252648590412,
 1.2335407086827157,
 1.2233137444083853,
 1.213928921392892,
 1.205288234367617,
 1.1973080252862673,
 1.189916505225245,
 1.1830517608076268,
 1.1766601411071484,
 1.1706949449191806,
 1.1651153464615125,
 1.1598855113945148,
 1.1549738656004664,
 1.150352487243748,
 1.1459965988527006,
 1.1418841409729286,
 1.137995412679211,
 1.1343127671526998,
 1.1308203528224636,
 1.1275038923795517,
 1.1243504934066895,
 1.1213484855104474,
 1.1184872797587266,
 1.1157572469634582,
 1.1131496119441644,
 1.1106563613916796
]


# plot those values and superimpose a line
myplot(x, y)

plt.ylim(0.75, 2.25)
plt.xlim(0.0, 52.0)

#plt.yscale("log")  # doesn't help identify the shape

# and put a few other things on the plot too
plt.title('')
plt.plot((2,50), (1,1), c='red', label='red')
#plt.legend()

# don't return a value from this cell
None

plotting some numbers¶