Скачать или смотреть Using Hypertext with pm3d Surface Plot in Gnuplot

Discover how to effectively implement `hypertext` alongside `pm3d` in Gnuplot surface plots for interactive representation of data.
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This video is based on the question https://stackoverflow.com/q/64378769/ asked by the user 'Gino' ( https://stackoverflow.com/u/14443219/ ) and on the answer https://stackoverflow.com/a/64381378/ provided by the user 'Ethan' ( https://stackoverflow.com/u/6797953/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Utilizing Hypertext with PM3D Surface Plots in Gnuplot

Creating stunning and informative visualizations using Gnuplot can sometimes present challenges, especially when trying to combine certain functionalities. One such challenge arises when attempting to use hypertext capabilities with pm3d surface plots. In this post, we will explore how to effectively achieve this combination to make your plots even more insightful.

Understanding the Problem

You might be familiar with the splot command in Gnuplot, which allows you to display 3D points and use hypertext to show their coordinates interactively. However, once you shift to using the pm3d command for generating surface heatmaps, you may notice that the hypertext functionality does not work as expected. The main question therefore becomes: Is it possible to use hypertext with pm3d simultaneously?

The Solution

The answer to your question is a resounding yes! You can use hypertext with pm3d to display your 3D surface alongside interactive labels showing coordinates. Below is a detailed, step-by-step guide to accomplishing this.

Step-by-Step Instructions

Define Your Function: Start by defining the mathematical function that will create the 3D surface. In our example, we'll use a simple sine-cosine function:

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Set the Range for X and Y: Determine the range of values for the X and Y axes. You can set the ranges as follows:

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Configure Sampling: Adjust the sampling parameters for better plot quality:

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Enable PM3D: Make sure to activate pm3d for surface plotting:

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Plot with Labels: Finally, you'll use the splot command with a special configuration to display hypertext labels for each plot point. Here’s the complete command:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

f($1, $2): This part of the command calculates the Z coordinate based on the defined function f.

sprintf("%.2g %.2g %.2g", $1, $2, f($1, $2)): This formats the label text to display the X, Y, and Z coordinates to two decimal places.

with labels point lc "# FF000000": This specifies that labels should be shown at the vertices of the surface plot, while lc "# FF000000" makes the points transparent to improve visibility of the surface.

Final Thoughts

By following these steps, you can successfully include hypertext in your pm3d surface plots, thus making your visual data representation much more interactive and informative. This powerful feature allows viewers to hover over points to see their coordinates in real-time, enhancing the understanding of complex data patterns.

Now you can create visually appealing and interactive 3D heatmaps that not only look great but also provide additional insights into the underlying data! Happy plotting!