76. D3 Data Join Key

D3: Removing values from a chart

A bar chart displays 20 numeric values, each labeled with its value. Clicking the text prompt removes the first data point and smoothly slides the remaining bars and labels left into their new positions. The example uses D3 v4’s `scaleBand` and `scaleLinear` for axes, and relies on selection `enter`, `merge`, and `exit` transitions to animate rectangles and text over 500 milliseconds. It binds data with a custom key function and renders entirely as SVG.

深深度碎片

81% match

74. D3 Adding Values

Clicking the text at the top adds a new random value to a dataset, causing a bar chart to update with a smooth transition. The example demonstrates the D3 data join pattern, using selections and `merge` to handle entering and updating rectangles. It employs `d3.scaleBand` for the x-axis, `d3.scaleLinear` for the y-axis, and SVG transitions over 500 milliseconds to animate the bars and their labels.

80% match

75. D3 Removing Values

Clicking the text above the chart removes the first value from a 20-point dataset, shifting the remaining bars left and shortening the tallest bar as the y-axis rescales. Built with D3.js version 4.5.0, the visualization uses SVG rectangles and labels, with `d3.scaleBand` and `d3.scaleLinear` mapping data to positions. The update pattern demonstrates the enter, update, and exit selections, merging new and existing elements with `selection.merge`, then animating transitions over 500 milliseconds via `transition.attr` and `.remove()`.

77. D3 Adding Removing

This example demonstrates how to add and remove data values from a bar chart in real time. Clicking the "Add a new data value" button pushes a randomly generated number onto a dataset, while clicking "Remove a data value" shifts the first element off the array. The SVG bars and text labels update with smooth transitions using D3’s `transition` and `duration` methods, with the x-scale domain recalculated via `d3.scaleBand` and `d3.range` to reflect the changing data length.

78. D3 Dynamic Labels

This example demonstrates a bar chart with dynamic labels that update as data values are added or removed. Clicking the "Add" or "Remove" text elements triggers transitions that shift bars and their corresponding numeric labels using D3.js version 4.5.0 with SVG rendering. The chart uses `d3.scaleBand` for the x-axis and `d3.scaleLinear` for the y-axis, with data bound via a key function. Entering bars slide in from the right, exiting bars slide out to the left, and labels move in sync with each 500-millisecond transition.

D3: Removing values from a chart

Clicking the text removes the first value from a static D3 bar chart, shifting the remaining bars left and recalculating their heights. The example demonstrates the enter, update, and exit pattern with `dataset.shift()`, re-binding data to SVG `rect` and `text` elements, and updating ordinal `xScale` and linear `yScale` domains. Transitions animate the bars sliding to new positions or exiting off the right edge.

MMathReynaud

D3: Removing values from a chart

MMathReynaud