Understanding MATLAB Code to Remove Data Labels from a Pie Chart

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In this technical guide, we will delve into MATLAB code that deals with creating a pie chart and removing data labels from it. The example code demonstrates how to filter data, extract labels and percentages, and modify the pie chart for a cleaner presentation (MATLAB Remove Labels).

Explaining the MATLAB Code

The provided MATLAB code performs the following steps:

  1. Initialize a matrix containing data points.
  2. Filter the matrix to include only rows with percentage values less than 7.
  3. Extract labels and corresponding percentages for the pie chart.
  4. Create the pie chart with labels.
  5. Remove data labels by setting the ‘TextType’ property to ‘none.’
% Your original matrix
matrix = [78, 5; 79, 6; 80, 7; 81, 11; 82, 13; 83, 15; 84, 18; 85, 16; 86, 7; 87, 1; 88, 1];

% Filter the matrix to include only rows with percentage values < 7
matrix_new = matrix(matrix(:, 2) < 7, :);

% Extract labels and corresponding percentages for the pie chart
labels = matrix_new(:, 1);
percentages = matrix_new(:, 2);

% Create the pie chart with labels
h = pie(percentages, labels);

% Set 'TextType' property to 'none' to remove percentage labels
hText = findobj(h, 'Type', 'text');
percentValues = get(hText, 'String');
combinedText = strcat(percentValues, ' %');
for i = 1:numel(hText)
    set(hText(i), 'String', '');
end

title('Pie Chart for Percentage Values < 7');
% Display the matrix_new values in the pie chart
label_str = arrayfun(@(x, y) sprintf('%d (%d%%)', x, y), matrix_new(:, 1), matrix_new(:, 2), 'UniformOutput', false);
% Title for the pie chart
title('Pie Chart for Percentage Values < 7');
% Add labels to the pie chart
legend(label_str, 'Location', 'EastOutside');
Understanding MATLAB Code to Remove Data Labels from a Pie Chart
Understanding MATLAB Code to Remove Data Labels from a Pie Chart

Understanding the Use Cases

Removing data labels from a pie chart is useful when you want to present the chart in a cleaner and more visually appealing way. By doing so, you can focus on the chart’s visual representation without the distraction of data labels.

Link to Original Question

If you’re curious about the origin of this MATLAB code or have additional questions, you can find the original question on Reddit: Reddit Original Question.

External Links (Reference Sites)

For further information on MATLAB, coding, and data visualization, you can explore these reference sites:

Internal Links (128mots.com) – MATLAB Remove Labels

For additional technical content and coding insights, you can explore the following articles on 128mots.com:

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