I am trying to visualize the tree using xgb's built-in function "plot_tree" on a Macbook:
import numpy as np
from xgboost import XGBRegressor, plot_tree
X = np.random.randint(0, 100, 100).reshape(100, 1)
y = np.random.randint(0, 500, 100).reshape(100, 1)
model = XGBRegressor(n_estimators = 1)
model.fit(X, y)
plot_tree(model)
However, I get the following error:
ExecutableNotFound: failed to execute ['dot', '-Tpng'], make sure the Graphviz executables are on your systems' PATH
I tried with: 1. brew install graphviz 2. Set before at the beginning of the script
os.environ["PATH"] += os.pathsep + "/Users/alessandro/opt/anaconda3/bin/"
However, the do not seem to be working, reporting the same error.
How can I visualize the single tree I've trained using Graphviz or alternative solutions?
It seems that your dot command is located in the folder /usr/local/bin/.
You can either add that folder to your PATH globally with the following terminal commands:
sudo nano /etc/paths
*type passsword*
Then add the line /usr/local/bin to the file, or if it's already there, move it to the top of the list.
To only add that folder to your PATH in this script I think you're command is very close, but needs slight adjustment:
os.environ["PATH"] += os.pathsep + "/usr/local/bin/"
Not the omission of dot as you're trying to add the folder, not the executable to the PATH.