while executing this code in MATLAB iam getting an error like visualizeBoundary requiers more input arguments?

Question

Deepika Dwarapureddi 2021-10-5

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https://ww2.mathworks.cn/matlabcentral/answers/1466956-while-executing-this-code-in-matlab-iam-getting-an-error-like-visualizeboundary-requiers-more-input

回答： Yongjian Feng 2021-11-21

function visualizeBoundary(X, y, model, varargin)
plotData(X, y)
x1plot = linspace(min(X(:,1)), max(X(:,1)), 100)';
x2plot = linspace(min(X(:,2)), max(X(:,2)), 100)';
[X1, X2] = meshgrid(x1plot, x2plot);
vals = zeros(size(X1));
for i = 1:size(X1, 2)
   this_X = [X1(:, i), X2(:, i)];
   vals(:, i) = svmPredict(model, this_X);
end
hold on
contour(X1, X2, vals, [0 1], 'Color', 'b');
hold off;
end

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Answer 1

Yongjian Feng 2021-11-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1466956-while-executing-this-code-in-matlab-iam-getting-an-error-like-visualizeboundary-requiers-more-input#answer_837024

How did you call this function?

It looks like this function needs:

X: a nx2 matrix
y: not sure how it is used in plotData. Most likely a nx2 matrix as well, one value for each point of X?
model: a ML model?
varargin: other optional input arguments. Doesn't seem to be used at all in the function

So you need at least the first three input arguments, right?