NCL_table_2.py

This script illustrates the following concepts:

• Drawing a table with headers

• Filling table cells with a given color

• Specifying the position of individual tables

See following URLs to see the reproduced NCL plot & script:

• Original NCL script: https://www.ncl.ucar.edu/Applications/Scripts/table_2.ncl

• Original NCL plot: https://www.ncl.ucar.edu/Applications/Images/table_2_lg.png

Import packages:

import matplotlib.pyplot as plt

Generate data:

# Set row headers (first column)
row_text = [
    "", "", "SLP_ERA40", "Tsfc_ERA40", "Prc_GPCP", "Prc 30S-30N_GPCP", "LW_ERS",
    "SW_ERS", "U300_ERA40", "Guess_BOGUS", "RH_NCEP", "LHFLX_ERA40",
    "TWP_ERA40", "CLDTOT_NCEP", "O3_NASA", "Q_JMA", "PBLH_JMA", "Omega_CAS"
]

# Set colors of row headers (first column)
rowcolors = [
    'skyblue', 'skyblue', 'lightgray', 'lightgray', 'lightgray', 'lightgray',
    'lightgray', 'lightgray', 'lightgray', 'lightgray', 'lightgray',
    'lightgray', 'lightgray', 'lightgray', 'lightgray', 'lightgray',
    'lightgray', 'lightgray'
]

# Set cell values (second and third column)
cell_text = [["Case A", "Case B"], ["ANN", "ANN"], ["1.230", "1.129"],
             ["0.988", "0.996"], ["1.092", "1.016"], ["1.172", "1.134"],
             ["1.064", "1.023"], ["0.966", "0.962"], ["1.079", "1.048"],
             ["0.781", "0.852"], ["1.122", "0.911"], ["1.000", "0.835"],
             ["0.998", "0.712"], ["1.321", "1.122"], ["0.842", "0.956"],
             ["0.978", "0.832"], ["0.998", "0.900"], ["0.811", "1.311"]]

# Set colors of cells (second and third columns)
colors = [['lightgray', 'lightgray'], ['lightgray', 'lightgray'],
          ["White", "palegreen"], ["White", "hotpink"], ["White", "palegreen"],
          ["White", "palegreen"], ["White",
                                   "palegreen"], ["White", "palegreen"],
          ["White", "palegreen"], ["White", "hotpink"], ["White", "palegreen"],
          ["White", "palegreen"], ["White", "palegreen"],
          ["White", "palegreen"], ["White", "hotpink"], ["White", "palegreen"],
          ["White", "palegreen"], ["White", "hotpink"]]

Plot:

# Create figure and axis
fig, ax = plt.subplots()

# Set axis aspect ratio
ax.set_aspect(2)

# Make axis spines invisible
fig.patch.set_visible(False)
ax.axis('off')

# Plot first table
table = ax.table(rowLabels=row_text,
                 rowColours=rowcolors,
                 rowLoc='center',
                 cellText=cell_text,
                 cellColours=colors,
                 cellLoc='center',
                 loc='center')

# Plot single-cell table in upper left of first table
plt.table(cellText=[['CAM METRICS']],
          cellColours=[['skyblue']],
          cellLoc='center',
          bbox=[-.694, .815, 0.694, 0.091])

# Give plot a tight layout
fig.tight_layout()

plt.show()