Can't create Partial Dependence Plot

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James McBrearty
James McBrearty 2022-5-13
回答： Hitesh 2025-4-4
Hi,
I am currently working in have 2022a, and I have an App that creates Regression/Classification Models. I am trying to show how the target depends on some generated features, so I want to plot some Partial Dependence graphs, however, I am unable to do this. The Model I have is a RegressionLinear model and looks like this:
If I try and use the command line to run a Partial Dependence Plot, it doesn't obtain any features:
If I try and call this the way that the documentation describes (plotPartialDependence(Mdl,1)), I get this:
Is there anything that I'm doing wrong, it does say that RegressionLinear is allowed for PartialDependence plots, so I'm confused.
Thanks,
James
  1 个评论
nick
nick 2023-11-7
Hi James,
I tried using the 'plotPartialDependence' function at my end on Linear Regression model and it works fine. Kindly share the code files to ensure reproducibility of the error at my end.

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回答（1 个）

Hitesh
Hitesh 2025-4-4
Hi James,
'plotPartialDependence' function works as intended in MATLAB R2022a. Kindly refer to the following piece of code as an use case of 'plotPartialDependence' function.
% Load or define your dataset
% X is the matrix of features, and y is the target variable
% For example purposes, let's create some sample data
X = rand(100, 3); % 100 samples, 3 features
y = 2 * X(:,1) + 3 * X(:,2) + 4 * X(:,3) + randn(100, 1);
% Train a linear regression model
Mdl = fitlm(X, y); % Mdl is your trained RegressionLinear model
% Specify the feature index for which you want to plot the Partial Dependence
featureIndex = 1; % Change this to the desired feature index
% Create the Partial Dependence Plot
figure;
plotPartialDependence(Mdl, featureIndex, X);
% Add labels and title for clarity
xlabel('Feature 1');
ylabel('Partial Dependence');
title('Partial Dependence Plot for Feature 1');
Kindly refer to the following MATLAB documentation for better understanding of 'plotPartialDependence' function:
https://www.mathworks.com/help/stats/regressiontree.plotpartialdependence.html

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