CSV Graph Preview

A VS Code extension that provides a quick visual preview of CSV column data on hover. Instantly understand your dataset without running a script.

Features

Instant Visualization: Hover over any value in a CSV file to see a graph of that column's data.
Smart Type Detection: Automatically detects if a column is Numerical or Categorical.
- Numeric Columns: Displays a Histogram (distribution) or Line Chart (trend).
- Categorical Columns: Displays a Frequency Bar Chart (counts of unique values).
Performance Optimized: Handles large datasets gracefully with smart downsampling for line charts.
Customizable: Adjust graph types and histogram bins to suit your needs.
Statistics: View key stats like Min, Max, Count, or Unique Values directly in the tooltip.

This extension provides the following settings:

csvPreview.graphType: Select the type of graph to display for numeric columns.
- histogram (default): Shows a frequency distribution bar chart.
- line: Shows a simple line chart of the values.
csvPreview.histogramBins: Number of bins to use for the numeric histogram (default: 10).

Open a .csv file in VS Code.
Hover your mouse cursor over any value in a column.
A tooltip will appear:
- Numbers: Shows a blue histogram or line chart.
- Text: Shows a gold frequency bar chart.

New Feature: Added support for Categorical Data (Frequency Bar Charts).
New Feature: Added Line Chart downsampling for better performance on large files.
Improvement: Enhanced smart type detection for columns.
Visuals: Updated extension icon.