How to use the floris.tools.cut_plane.HorPlane function in floris

layout_y = []
for i in range(N_row):
	for k in range(N_row):
		layout_x.append(i*spc*D)
		layout_y.append(k*spc*D)
N_turb = len(layout_x)

fi.reinitialize_flow_field(layout_array=(layout_x, layout_y),wind_direction=[270.0],wind_speed=[8.0])
fi.calculate_wake()

# ================================================================================
print('Plotting the FLORIS flowfield...')
# ================================================================================

# Initialize the horizontal cut
hor_plane = wfct.cut_plane.HorPlane(
    fi.get_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)

# Plot and show
fig, ax = plt.subplots()
wfct.visualization.visualize_cut_plane(hor_plane, ax=ax)
ax.set_title('Baseline flow for U = 8 m/s, Wind Direction = 270$^\circ$')

# ================================================================================
print('Importing wind rose data...')
# ================================================================================

# Create wind rose object and import wind rose dataframe using WIND Toolkit HSDS API.
# Alternatively, load existing file with wind rose information.
calculate_new_wind_rose = False

finish = time.time()
print('Time to calculate flow field', finish - start)

# Get a horizontal cut from default flow field
start = time.time()
hor_plane_1 = wfct.cut_plane.HorPlane(
    fi.get_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)
fi.calculate_wake()
finish = time.time()
print('Time to extract default flow field', finish - start)

# Get a horizontal cut from horizontal methods
start = time.time()
hor_plane_2 = wfct.cut_plane.HorPlane(
    fi.get_hub_height_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)
fi.calculate_wake()
finish = time.time()
print('Time to extract horizontal flow field', finish - start)

# Plot and show they are the same
fig, axarr = plt.subplots(1, 2)
wfct.visualization.visualize_cut_plane(
    hor_plane_1, ax=axarr[0], minSpeed=minSpeed, maxSpeed=maxSpeed)
wfct.visualization.visualize_cut_plane(
    hor_plane_2, ax=axarr[1], minSpeed=minSpeed, maxSpeed=maxSpeed)
plt.show()

spc = 5
layout_x = [0, 0]
layout_y = [0, 5*D]
N_turb = len(layout_x)

fi.reinitialize_flow_field(layout_array=(layout_x, layout_y),wind_direction=[270.0],wind_speed=[8.0])
fi.calculate_wake()

unc_options={'std_wd': 4.95, 'std_yaw': 0.0,'pmf_res': 1.0, 'pdf_cutoff': 0.95}

# ================================================================================
print('Plotting the FLORIS flowfield...')
# ================================================================================

# Initialize the horizontal cut
hor_plane = wfct.cut_plane.HorPlane(
    fi.get_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)

# Plot and show
fig, ax = plt.subplots()
wfct.visualization.visualize_cut_plane(hor_plane, ax=ax)
ax.set_title('Baseline flow for U = 8 m/s, Wind Direction = 270$^\circ$')

# ================================================================================
print('Importing wind rose data...')
# ================================================================================

# Create wind rose object and import wind rose dataframe using WIND Toolkit HSDS API.
# Alternatively, load existing file with wind rose information.
calculate_new_wind_rose = False

layout_y.append(k*spc*D)
    N_turb = len(layout_x)

    fi.reinitialize_flow_field(layout_array=(layout_x, layout_y),wind_direction=[270.0],wind_speed=[8.0])
    fi.calculate_wake()

    # option to include uncertainty
    include_unc = False
    unc_options={'std_wd': 4.95, 'std_yaw': 0.0,'pmf_res': 1.0, 'pdf_cutoff': 0.95}

    # ================================================================================
    print('Plotting the FLORIS flowfield...')
    # ================================================================================

    # Initialize the horizontal cut
    hor_plane = wfct.cut_plane.HorPlane(
        fi.get_flow_data(),
        fi.floris.farm.turbines[0].hub_height
    )

    # Plot and show
    fig, ax = plt.subplots()
    wfct.visualization.visualize_cut_plane(hor_plane, ax=ax)
    ax.set_title('Baseline flow for U = 8 m/s, Wind Direction = 270$^\circ$')

    # ================================================================================
    print('Importing wind rose data...')
    # ================================================================================

    # Create wind rose object and import wind rose dataframe using WIND Toolkit HSDS API.
    # Alternatively, load existing .csv file with wind rose information.
    calculate_new_wind_rose = True

# Define speed limits
minSpeed = 4.
maxSpeed = 8.

# Initialize FLORIS model
fi = wfct.floris_utilities.FlorisInterface("example_input.json")

# Calculate the time to run wake
start = time.time()
fi.calculate_wake()
finish = time.time()
print('Time to calculate flow field', finish - start)

# Get a horizontal cut from default flow field
start = time.time()
hor_plane_1 = wfct.cut_plane.HorPlane(
    fi.get_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)
fi.calculate_wake()
finish = time.time()
print('Time to extract default flow field', finish - start)

# Get a horizontal cut from horizontal methods
start = time.time()
hor_plane_2 = wfct.cut_plane.HorPlane(
    fi.get_hub_height_flow_data(),
    fi.floris.farm.turbines[0].hub_height
)
fi.calculate_wake()
finish = time.time()
print('Time to extract horizontal flow field', finish - start)

# set turbine locations to 3 turbines in a row
D = fi.floris.farm.turbines[0].rotor_diameter
layout_x = [0, 7 * D, 14 * D]
layout_y = [0, 0, 0]
fi.reinitialize_flow_field(layout_array=(layout_x, layout_y))
fi.calculate_wake()

# initial power output
power_initial = np.sum(fi.get_turbine_power())

# ================================================================================
print('Plotting the FLORIS flowfield...')
# ================================================================================

# Initialize the horizontal cut
hor_plane = wfct.cut_plane.HorPlane(fi.get_hub_height_flow_data(),
                                    fi.floris.farm.turbines[0].hub_height)

# Plot and show
fig, ax = plt.subplots()
wfct.visualization.visualize_cut_plane(hor_plane, ax=ax)

# ================================================================================
print('Finding optimal yaw angles in FLORIS...')
# ================================================================================
# set bounds for allowable wake steering
min_yaw = 0.0
max_yaw = 25.0
yaw_angles = optimize_yaw(fi, min_yaw, max_yaw)

print('yaw angles = ')
for i in range(len(yaw_angles)):

print('==========================================')
print('Total Power Gain without Uncertainty = %.1f%%' %
      (100.*(power_opt - power_initial)/power_initial))
print('Total Power Gain with Uncertainty using Original Yaw Angles = %.1f%%' %
      (100.*(power_opt_unc - power_initial_unc)/power_initial_unc))
print('Total Power Gain with Uncertainty using Robust Yaw Angles = %.1f%%' %
      (100.*(power_opt_unc_robust - power_initial_unc)/power_initial_unc))
print('==========================================')
# =============================================================================
print('Plotting the FLORIS flowfield with yaw...')
# =============================================================================

# Initialize the horizontal cut without uncertainty
fi.calculate_wake(yaw_angles=yaw_angles)
hor_plane = wfct.cut_plane.HorPlane(
    fi.get_hub_height_flow_data(x_resolution=400,
                                 y_resolution=100),
    fi.floris.farm.turbines[0].hub_height
)

# Plot and show
fig, ax = plt.subplots(figsize=(7.0, 5.0))
wfct.visualization.visualize_cut_plane(hor_plane, ax=ax)
ax.set_title('Optimal Wake Steering without Uncertainty for U = 8 m/s, Wind Direction = 273$^\circ$')

# Initialize the horizontal cut for robust wake steering with uncertainty
fi.calculate_wake(yaw_angles=yaw_angles_unc)
hor_plane = wfct.cut_plane.HorPlane(
    fi.get_hub_height_flow_data(x_resolution=400,
                                 y_resolution=100),
    fi.floris.farm.turbines[0].hub_height