7.16.3.1. statsmodels.graphics.correlation.plot_corr¶

statsmodels.graphics.correlation.plot_corr(dcorr, xnames=None, ynames=None, title=None, normcolor=False, ax=None, cmap='RdYlBu_r')[source]¶

Plot correlation of many variables in a tight color grid.

Parameters:

dcorr : ndarray

Correlation matrix, square 2-D array.

xnames : list of str, optional

Labels for the horizontal axis. If not given (None), then the matplotlib defaults (integers) are used. If it is an empty list, [], then no ticks and labels are added.

ynames : list of str, optional

Labels for the vertical axis. Works the same way as xnames. If not given, the same names as for xnames are re-used.

title : str, optional

The figure title. If None, the default (‘Correlation Matrix’) is used. If title='', then no title is added.

normcolor : bool or tuple of scalars, optional

If False (default), then the color coding range corresponds to the range of dcorr. If True, then the color range is normalized to (-1, 1). If this is a tuple of two numbers, then they define the range for the color bar.

ax : Matplotlib AxesSubplot instance, optional

If ax is None, then a figure is created. If an axis instance is given, then only the main plot but not the colorbar is created.

cmap : str or Matplotlib Colormap instance, optional

The colormap for the plot. Can be any valid Matplotlib Colormap instance or name.

Returns:

fig : Matplotlib figure instance

If ax is None, the created figure. Otherwise the figure to which ax is connected.

Examples

>>> import numpy as np
>>> import matplotlib.pyplot as plt
>>> import statsmodels.api as sm

>>> hie_data = sm.datasets.randhie.load_pandas()
>>> corr_matrix = np.corrcoef(hie_data.data.T)
>>> sm.graphics.plot_corr(corr_matrix, xnames=hie_data.names)
>>> plt.show()