By Team Hypomnema · Data
Compare simple forecasts with a chronological holdout.
Use the guide alongside the working tool.
Open Time-Series Forecast Studio →Explicit working sample
date,value
2026-01-01,20
2026-01-02,23
2026-01-03,21
2026-01-04,27
2026-01-05,26
2026-01-06,31
2026-01-07,30
2026-01-08,34
2026-01-09,33
2026-01-10,38
2026-01-11,36
2026-01-12,41Compare simple forecasts with a chronological holdout. Requires valid dates or timezone-explicit ISO timestamps and finite numeric values. Dates sort ascending. Resampling uses UTC calendar bins; other tools require unique timestamps. Rolling windows count observations. Forecasts require equal timestamp spacing, use chronological holdout MAE, and provide approximate residual intervals, not guaranteed bounds. Up to 5,000 generated bins or 60 forecast periods.
Prepare the input
Compare simple forecasts with a chronological holdout.
CSV, TSV and arrays of scalar JSON objects are supported. Identifiers stay text. Empty cells are missing by default; add special missing tokens only if their meaning is certain. Use the sample to inspect the exact workflow.
Review the method
Requires valid dates or timezone-explicit ISO timestamps and finite numeric values. Dates sort ascending. Resampling uses UTC calendar bins; other tools require unique timestamps. Rolling windows count observations. Forecasts require equal timestamp spacing, use chronological holdout MAE, and provide approximate residual intervals, not guaranteed bounds. Up to 5,000 generated bins or 60 forecast periods.
Keep the useful output
Review the summary and result records. Transformation tools retain separate change, rejected-record or diagnostics datasets where relevant. Choose the dataset before exporting; a report and a cleaned dataset serve different purposes.
CSV exports protect formula-like text. JSON keeps data portable without making an Excel workbook. Reports and editable backups may contain private source values; download only what you intend to share. No automatic account storage or server processing is used.
Ready to apply this workflow?
Try Time-Series Forecast Studio →Explore a related workflow
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Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.