Feature Analysis View
Feature Analysis View draws the feature-by-feature matrix that Feature Analysis Controls computed: one colored cell per pair of numeric columns. It is a display surface with exactly one interaction, and every setting that shapes it lives in the Controls panel.
Where to find it
View → Quantitative → Feature Analysis View. It needs Feature Analysis Controls open beside it; the Quantitative Analysis and Coding layout presets open the pair together.
What it shows
The panel is empty until a matrix exists:
- “Heatmap appears here…” before any analysis has run.
- “Please select at least two features to compare” when fewer than two features are toggled on in the Controls panel.
- “Loading matrix data…” while the request is in flight.
Once a matrix is loaded, the plot title names the matrix type: Correlation Matrix, Spearman Matrix, or Covariance Matrix. Rows and columns follow the order of the active features in the Controls panel, so dragging features there reorders the heatmap.
The color scale is RdBu. For Correlation and Spearman it is pinned to the -1 to 1 range, so colors mean the same thing across runs. For Covariance it auto-scales to the data, so the same color can mean very different magnitudes between two spaces. Cells that could not be computed read N/A.
Interactions
- Hover a cell. The strip under the plot reads “Comparing features: A and B” with the matrix value to three decimals.
- Click a cell. The cell is shaded grey and the pair is pushed into Plot Controls (Simple) as the X and Y dimensions, so the scatter plot of those two columns appears in Plots View. Click the same cell again to clear the shading.
Only one cell is marked at a time; clicking a second cell moves the marker.
Limits
- The panel has no controls of its own. Matrix type, scaling, and the feature list are all in Feature Analysis Controls.
- Only feature toggling and reordering redraw instantly. Changing the matrix type or the scaling needs a fresh Run Analysis 🚀 in the Controls panel.
- Color, size, and shape encodings are a Plot Controls concern, not a heatmap concern.
- There is no agent button in this panel.