Matplotlib - plot()

https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.plot.html

PLOT

Plot y versus x as lines and/or markers.

# matplotlib.pyplot.plot(*args, scalex=True, scaley=True, data=None, **kwargs)
#
# Call signatures:
# plot([x], y, [fmt], *, data=None, **kwargs)
# plot([x], y, [fmt], [x2], y2, [fmt2], ..., **kwargs)
#
# x, y : array-like or scalar
# fmt : str, optional
# scalex, scaley : bool, default: True
# These parameters determine if the view limits are adapted to the data limits. 
# data : indexable object with labelled data
# Returns a list of Line2D objects representing the plotted data.

# Format strings:
# fmt = '[marker][line][color]'
# fmt = '[color][marker][line]'

# Basic formatting:
plt.plot(x, y, 'r-')   # red solid line and no marker
plt.plot(x, y, color="red", linestyle="solid")   # red solid line and no marker
plt.plot(x, y, 'bo')   # blue circle and no line
plt.plot(x, y, color="blue", marker="o", linestyle="None")   # blue circle and no line
plt.plot(x, y, 'g^:')   # green triangle and dotted line
plt.plot(x, y, 'cs--')   # cyan square and dashed line
plt.plot(x, y, 'kD-')   # black diamond and solid line

# The supported color abbreviations are the single letter codes.

# character   color   keyword
'b'   blue      color="blue"
'g'   green     color="green"
'r'   red       color="red"
'c'   cyan      color="cyan"
'm'   magenta   color="magenta"
'y'   yellow    color="yellow"
'k'   black     color="black"
'w'   white     color="white"

# Line styles.

# characters   description   keyword
'-'    solid line style      linestyle="solid"
'--'   dashed line style     linestyle="dashed"
'-.'   dash-dot line style   linestyle="dashdot"
':'    dotted line style     linestyle="dotted"
no line                      linestyle="None"

# Selected keywords.
# When conflicting with fmt, keyword arguments take precedence.

color='yellow'
linestyle="solid"   # ls="solid"
linewidth=2.0   # float, lw=2.0
marker='o'
markersize=12   # float
markerfacecolor='r'
markeredgewidth=2   # float
label='line 1'   # for legends

MARKERS

https://matplotlib.org/stable/api/markers_api.html

# Selected markers (keyword marker).

marker="."   # point
marker="o"   # circle
marker="v"   # triangle_down
marker="^"   # triangle_up
marker="<"   # triangle_left
marker=">"   # triangle_right
marker="s"   # square
marker="D"   # diamond
marker="d"   # thin_diamond
marker="*"   # star
marker="+"   # plus
marker="x"   # x
marker="|"   # vline
marker="_"   # hline

EXAMPLES

# ch.py
import matplotlib.pyplot as plt

s = 5
all_points = [(i, j) for i in range(s) for j in range(s)]
convex_hull = [(0, 0), (s-1, 0), (s-1, s-1), (0, s-1)] # counterclockwise
convex_hull.append(convex_hull[0])   # closing a polygon

x = [p[0] for p in all_points]
y = [p[1] for p in all_points]
plt.plot(x, y, 'bD', label="points")

hx = [p[0] for p in convex_hull]
hy = [p[1] for p in convex_hull]
plt.plot(hx, hy, 'r-', label="convex hull")

plt.title("Convex Hull")
plt.xlabel("x")
plt.ylabel("y")
plt.legend()   # using labels
plt.show()