I am trying to plot the decision boundary for extreme learning machine but I am getting the error "To RESHAPE the number of elements must not change"

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uma 2022-12-15

Can you please tell where i am doing the mistake in the below code.

data = load('example1.txt');

% Split the data into training and testing sets

train_data = data(1:30,1:2); % Features

train_label = data(1:30,3); % Labels

test_data = data(31:51,1:2);

test_label = data(31:51,3);

% Train ELM model

elm = elm_train([train_data train_label] , 1, 7, 'sigmoid')

% Create a grid of points covering the space of the input data

minX1 = min(data(:,1));

maxX1 = max(data(:,1));

minX2 = min(data(:,2));

maxX2 = max(data(:,2));

[x1Grid, x2Grid] = meshgrid(minX1:0.1:maxX1, minX2:0.1:maxX2);

% Predict the output for the grid of points

yGrid = elm_predict([test_data test_label]);

hold on;

scatter(test_data( test_label==0,1), test_data(test_label==0,2), 'b', 'o');

scatter(test_data(test_label==1,1), test_data(test_label==1,2), 'r', 'x');

y1=reshape(yGrid, size(x1Grid))

% Plot the decision boundary

contour(x1Grid, x2Grid, y1, [0.5, 0.5],'linewidth',1);

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