Sreenivasulu

@SUSREE64·9 public vizzes

Random Number

Two charts display monthly data for a single year. A bar chart and a line chart share the same twelve month labels on the x-axis, with each dataset containing a distinct set of numeric values. The page sets its title via JavaScript and uses the Chart.js library, loaded from a CDN, to render both canvases. The bar chart is drawn with a red background and border, while the line chart uses a red fill with a different blue border color. Both canvases are styled with a dark blue CSS border.

Feb 15, 2022

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calculator

This interactive simple interest calculator uses a standard web form to compute interest based on principal amount, time in years, and interest rate. Users enter three numeric values into separate input fields and trigger the calculation via an HTML button that calls the `calculate()` function. The JavaScript code retrieves the input values using `document.getElementById()`, applies the formula `(principal*time*rate)/100`, and displays the output in a designated heading element. A reset button reloads the page to clear all values. The interface is styled with custom CSS, using absolute positioning and border styling for a clean, basic layout.

Feb 6, 2022

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Manipulating SVG elements

This example demonstrates how to manipulate SVG elements interactively using D3.js within a React framework. A single yellow rectangle changes color, size, and stroke properties when users click buttons labeled "Change Color!", "Grow big!", and "Go back!". The code uses d3.select to target the rectangle by ID and modifies attributes such as fill, width, height, and stroke-width. The heading text also turns red through d3.style. The example uses d3.v5 and renders SVG directly in the browser, with styles defined in an external CSS file.

Feb 6, 2022

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EarthQuakes Bubblegraph

This visualization displays recent significant earthquakes as a bubble graph, plotting each seismic event as a circle positioned by its magnitude. The interactive map, rendered as an SVG canvas, uses mouseover events to highlight individual quakes and display their location and magnitude in a text element. Built with React and D3.v5, the code fetches live data from the USGS Earthquake API, styling each bubble with radius scaled to magnitude and colored by alert level, set against a stylized blue background.

Sep 27, 2020

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Barplot

This example shows two bar charts side by side, both visualizing the same array of numbers. The first chart renders the bars using a standard JavaScript for loop, while the second uses D3’s data join with `selectAll`, `data`, and `enter` to create the rectangles. Both charts are drawn as SVG elements, with static positioning for x and y coordinates and bar heights proportional to the data values. The code relies on D3 v5 APIs such as `d3.select`, `append`, and attribute setters, and includes background coloring, axis lines, and titles for each chart.

Sep 26, 2020

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SVG Injection

This example demonstrates injecting HTML and SVG elements into a webpage using D3.js version 6. The code uses `d3.select` to target a div, appends a styled header, and creates an SVG canvas with a series of colorful circles. Each circle’s position, radius, and fill color are sequentially modified within a loop to produce a gradient-like visual effect. The example relies on D3’s `append` and `attr` methods, along with inline CSS styling, to render the final composition.

Sep 20, 2020

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Random Digit Dice

This example visualizes random digit generation as a dice-rolling game. A grid of 20 circles represents possible outcomes, and clicking the Play button randomly selects a digit (0-9), coloring the corresponding circles orange. The code uses D3.js v5 selection methods like `d3.select` and `attr` to update circle fills. A Reset button restores all circles to black. The visualization renders as an SVG with IDs for each circle, and the random number logic is implemented in plain JavaScript using `Math.random()`.

Sep 13, 2020

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DOM Manipulation

This example demonstrates how D3.js can be used to manipulate HTML DOM elements directly, changing their styles and content in response to user interaction. It shows a static page with breakfast and non-vegetarian food lists, where text colors and font sizes are altered using `d3.select` and `d3.selectAll`. Clicking the "Change Colors!" button triggers a JavaScript function that updates the non-vegetarian list’s background and chicken item’s styles via D3’s chained style methods. The code uses d3.v5, React as the framework, and plain HTML/CSS for structure.

Sep 13, 2020

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Manipulating DOM

This example demonstrates how D3.js can dynamically manipulate HTML elements in the DOM. Using d3.select, the code changes text colors, background colors, and list attributes when the "Change!" button is clicked, and resets them with the "Reset!" button. The page includes a heading, paragraphs, and ordered/unordered lists styled via CSS, showing D3's ability to modify existing web content beyond SVG visualization.

Sep 13, 2020