Report¶
A report turns the table you are looking at into one HTML file you can send to somebody: per-column statistics, a chart for each column, the most common values and a correlation matrix.
The file is self-contained. Its styling is inline, its charts are inline SVG, it runs no JavaScript and it fetches nothing, so it opens from a mail attachment on a machine with no internet and can be published as a static file with no assets beside it.
Opening it¶
File → Report.... There is no default keyboard shortcut; one can be assigned under Settings → Shortcuts.
The report covers the active tab, follows whatever filter is applied to it, and includes your unsaved edits, exactly as the Summary tab does.
What goes in¶
Each section can be switched off.
| Section | What it shows |
|---|---|
| Column statistics | Type, nulls, unique values and the numeric summary for every column. |
| Distribution charts | A histogram per numeric column, a bar chart of the commonest values otherwise. |
| Most common values | The most frequent values per column, with counts and shares. |
| Correlation | How the numeric columns move together. |
Nothing here is calculated a second time. The statistics come from the same engine as the Summary tab, the top values from Value frequency, the matrix from Correlation, and the pictures from the Chart tab's own SVG export. The report cannot disagree with what Octa shows on screen.
Distributions draws at most 50 columns and then says how many it left out, since a 500-column table would otherwise produce a document nobody scrolls. Correlation needs at least two numeric columns; below that the section is left out rather than showing a column's correlation with itself.
Profiling a sample¶
Profile a sample only is off, so every row is examined. Turn it on for a faster, approximate report on a very large table. The document then states how many rows it looked at and how many there were, so nobody mistakes approximate numbers for exact ones.
Under an active filter the sample is drawn from the rows the filter leaves visible, never from the hidden ones.
When it is done¶
Building runs in the background, so Octa stays usable, and Cancel stops it. When it finishes the dialog shows where the file went and offers Open in browser.
Elsewhere in Octa¶
The same engine runs on the command line and over MCP:
See octa --report and the
create_report MCP tool, which the
in-app Assistant can also call.
See also¶
- Summary, the statistics section as a tab.
- Data quality report, which grades a table rather than describing it.
- Chart, for one picture rather than a whole document.