ACTUAL VS PREDICTED DIAGNOSTIC

Residual Plot Generator

Paste observed values and the predictions that go with them. This tool plots each residual (observed − predicted) against its supplied predicted value and shows an accessible row table. It does not generate predictions itself.

Supplied predictions onlyResidual vs fittedBrowser-based

YOUR DATA

Enter observed and predicted values

Paste or upload two numeric columns: observed values and the predictions supplied by a model or another calculator. Use a period as the decimal mark. Up to 5 MB and 5,000 observations are accepted.

Upload a CSV or TSV file

The file is read locally in your browser.

Or paste data

One pair per row; both values must be finite numbers.

Observed values

Predicted values

First row contains column namesTurn this off when the first line is data.

YOUR RESULTS

Residual plot

RMSE—Typical residual size in observed-value units

MAE—Average absolute residual

Residuals versus supplied predicted values

The horizontal dashed line marks zero residual. Points are the pairs you supplied.

Residual Zero

Residuals by observation

Residual = observed − predicted.

Row	Observed	Predicted	Residual	Absolute residual

How to use this plot

Paste paired observed and predicted values, or load the example.
Choose which column is observed and which is predicted.
Inspect the residual plot for systematic patterns such as curvature, fan-shaped spread or outliers.
Download the residual table as JSON or CSV for further analysis.

What the plot shows

For each pair the residual is observed − predicted. The horizontal axis shows the supplied predicted value; the vertical axis shows the residual. A random cloud around the zero line is consistent with no obvious pattern in these residuals, while a trend or changing spread suggests the model may be missing structure or variance heterogeneity.

RMSE and MAE are shown to summarise residual magnitude. They are computed from the pairs you supplied; this page does not fit a model or generate predictions.

Limitations

Predictions are supplied by you, not generated by this tool. The plot can only reveal patterns in the values you upload.
Observed and predicted values must be aligned row by row and use the same units.
A pattern in the residuals is a diagnostic clue, not proof that a particular assumption is violated.
The current input limit is 5,000 observations and 5 MB per file.