Analysis Data

Chartgen skill providing three core functions: data analysis, data interpretation, and data visualization. **Use Cases**: (1) Data Analysis - Statistics, fil...

ChartGen AI Chart Generator

AI-powered chart generator that creates professional visualizations through natural language. Built on ChartGen AI engine.

Overview

Transform your data into stunning, interactive charts with simple natural language commands. No coding required - just describe the chart you want, and ChartGen AI generates it instantly.

This skill supports Text-to-Chart, Text-to-SQL, and Text-to-Data analysis. Simply provide Excel/CSV files or JSON data, describe your visualization needs in plain language, and get interactive ECharts visualizations, structured analysis reports, and AI-driven insights.

Powered by ChartGen AI engine, supporting multiple chart types including bar, line, pie, scatter, area, and more. Optimized for business analytics and data storytelling.

API Service: This skill uses the ChartGen API service hosted at chartgen.ai. All data is sent to https://chartgen.ai/api/platform_api/ for processing.

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Quick Start

1. Apply for an API Key

You can easily create and manage your API Key at chartgen.ai. To begin with, you need to register for an account.

Steps:

1. Visit chartgen.ai and sign up for an account
2. Access the API management dashboard
3. Create a new API and set the credit consumption limit
4. Copy the API Key for use

2. Configure Environment Variable

export CHARTGEN_API_KEY="your-api-key-here"

3. Run Scripts

# Generate Chart (Text-to-Chart)
python scripts/data_visualization.py --query "Draw a bar chart of sales by region" --file sales.xlsx

# Data Analysis
python scripts/data_analysis.py --query "Calculate total sales by region" --file sales.xlsx

# Data Interpretation
python scripts/data_interpretation.py --query "Analyze sales trends" --file sales.xlsx

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Credit Rules

• Calling a single tool consumes 20 credits
• You get 200 free credits per month for free accounts
• When credits run out, you can purchase more or upgrade your account on the chartgen.ai Billing page

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Scripts Reference

Script	Function	Use Case
data_visualization.py	Chart Generation	Text-to-Chart, create bar/line/pie/scatter charts
data_analysis.py	Data Analysis	Statistics, filtering, aggregation, calculation
data_interpretation.py	Insight Generation	Trend analysis, pattern discovery, report generation

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Parameters

Common Parameters

Parameter	Required	Description
--query	Yes	Natural language query statement
--file	No	Local file path (.xlsx/.xls/.csv), mutually exclusive with --json
--json	No	JSON data (string or file path), mutually exclusive with --file

Visualization Specific Parameters

Parameter	Description
--output, -o	Output HTML file path (defaults to /tmp/openclaw/charts/)

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Data Format

File Format

Supports .xlsx, .xls, .csv Excel and CSV files.

Note: Only one of --file or --json is needed. If both are provided, --file takes precedence. File types support both row-metric-column data files and column-metric-row data files.

JSON Format

JSON data should be an array format, where each element is a row of data:

[
  {"name": "Product A", "sales": 1000, "region": "East"},
  {"name": "Product B", "sales": 1500, "region": "North"},
  {"name": "Product C", "sales": 800, "region": "South"}
]

Or pass via file:

python scripts/data_visualization.py --query "Draw a chart" --json data.json

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Usage Examples

Chart Generation (Text-to-Chart)

# Bar chart
python scripts/data_visualization.py --query "Draw a bar chart of sales by product" --file sales.xlsx

# Line chart
python scripts/data_visualization.py --query "Draw a line chart of sales trends" --file trends.xlsx

# Pie chart
python scripts/data_visualization.py --query "Draw a pie chart of sales by region" --file sales.xlsx

# Scatter plot
python scripts/data_visualization.py --query "Draw a scatter plot of price vs quantity" --file data.xlsx

# Save to specific path
python scripts/data_visualization.py --query "Draw a bar chart" --file data.xlsx -o /path/to/chart.html

Data Analysis

# Statistical calculation
python scripts/data_analysis.py --query "Calculate total and average sales by region" --file sales.xlsx

# Data filtering
python scripts/data_analysis.py --query "Filter products with sales greater than 1000" --file sales.xlsx

# Sorting
python scripts/data_analysis.py --query "Sort by sales in descending order" --file sales.xlsx

Insight Generation

# Trend analysis
python scripts/data_interpretation.py --query "Analyze monthly sales trends" --file monthly_sales.xlsx

# Anomaly detection
python scripts/data_interpretation.py --query "Find and explain anomalies in the data" --file data.xlsx

# Comprehensive interpretation
python scripts/data_interpretation.py --query "Provide a comprehensive analysis with key insights" --file report.xlsx

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Supported Chart Types

• Bar Chart / Stacked Bar Chart
• Line Chart / Area Chart
• Pie Chart / Donut Chart
• Scatter Plot
• And more...

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Output Description

Chart Generation

1. Console Output: ECharts configuration JSON
2. HTML File: Interactive chart that can be opened in any browser

Data Analysis & Insight Generation

Returns Markdown format text results, including analysis conclusions, data tables, and insights.

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Error Handling

Common errors and solutions:

Error Message	Cause	Solution
CHARTGEN_API_KEY not set	Environment variable not set	export CHARTGEN_API_KEY="your-key"
API request timeout	Request timeout	Check network connection and retry
File not found	File does not exist	Check if file path is correct
credits are insufficient	Insufficient credits	Recharge or contact administrator

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Technical Details

• API Base URL: https://chartgen.ai/api/platform_api/
• Authentication: Header Authorization: <api-key>
• Request Format: JSON
• Timeout: 60 seconds
• Required Environment Variable: CHARTGEN_API_KEY

See scripts/chartgen_api.py for implementation details.

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Privacy Notice

Data sent to remote API: This skill reads your provided data files (CSV/XLSX/JSON), base64-encodes them, and sends them to the ChartGen API at https://chartgen.ai/api/platform_api/ for analysis and chart generation. Your data will leave your machine.

Recommendations:

• Do not upload sensitive or regulated data
• Use a dedicated API key with limited scope/credits
• Review the privacy practices at chartgen.ai before use