cohort-analysis

Cohort Analysis

Analyze retention and behavior patterns by grouping users into cohorts - understand how different customer groups behave over time.

When to Use This Skill

• Retention tracking - Measure how users stick around over time
• Acquisition analysis - Compare cohorts from different channels
• Product changes - Measure impact on user behavior
• Churn prediction - Identify at-risk cohorts
• LTV estimation - Project customer lifetime value

What Claude Does vs What You Decide

| Claude Does | You Decide | |-------------|------------| | Structures analysis frameworks | Metric definitions | | Identifies patterns in data | Business interpretation | | Creates visualization templates | Dashboard design | | Suggests optimization areas | Action priorities | | Calculates statistical measures | Decision thresholds |

Dependencies

pip install pandas plotly click

Commands

Retention Analysis

python scripts/main.py retention data.csv --date-col signup --event-col purchase
python scripts/main.py retention data.csv --date-col signup --periods week

Visualize Cohorts

python scripts/main.py visualize cohorts.csv --output retention_chart.html

Export Report

python scripts/main.py report data.csv --date-col signup --event-col active --output report.html

Examples

Example 1: Analyze User Retention

python scripts/main.py retention users.csv --date-col signup_date --event-col last_active

# Output:
# Cohort Retention Analysis
# ──────────────────────────────────
# Cohort     Users    M1     M2     M3     M4
# Jan 2024   1,234    65%    48%    42%    38%
# Feb 2024   1,456    62%    45%    41%    --
# Mar 2024   1,321    68%    52%    --     --
# Apr 2024   1,567    64%    --     --     --
#
# Avg Retention: 65% → 48% → 42% → 38%
# Best Cohort: Mar 2024 (68% M1)

Example 2: Generate Visual Report

python scripts/main.py report transactions.csv \
  --date-col signup \
  --event-col purchase_date \
  --output retention_report.html

# Generates interactive HTML with:
# - Retention heatmap
# - Cohort size chart
# - Trend analysis

Cohort Table Format

| Cohort | Size | Period 0 | Period 1 | Period 2 | Period 3 | |--------|------|----------|----------|----------|----------| | 2024-01 | 1234 | 100% | 65% | 48% | 42% | | 2024-02 | 1456 | 100% | 62% | 45% | - | | 2024-03 | 1321 | 100% | 68% | - | - |

Skill Boundaries

What This Skill Does Well

• Structuring data analysis
• Identifying patterns and trends
• Creating visualization frameworks
• Calculating statistical measures

What This Skill Cannot Do

• Access your actual data
• Replace statistical expertise
• Make business decisions
• Guarantee prediction accuracy

Related Skills

• [ab-test-stats](../ab-test-stats/) - Test retention experiments
• [funnel-analyzer](../funnel-analyzer/) - Analyze conversion funnels

Skill Metadata

• Mode: centaur

category: analytics
subcategory: retention
dependencies: [pandas, plotly]
difficulty: intermediate
time_saved: 4+ hours/week