News Analytics

FastAPI-backed source, lens, workflow, and event diagnostics

The news surface reads from the backend contract and exposes exploratory comparisons, data quality checks, workflow health, and same-event analysis.

Index

Pages

All routes below stay inside the same shared analytics surface.

Live FastAPI data

What this page does

View latent lens components that explain the largest variance in the dataset.

Snapshot mode requires a valid date (`YYYY-MM-DD`). Falling back to current data until provided.

Overview

Coverage and fit diagnostics for the PCA, MDS, and source-separation views.

Articles729

Lenses12

Components6

Coverage Modecomplete_rows

MDS Stress0.229

Source Separation0.630

Silhouette-Like Mean-0.119

Separation Basiseuclidean_distance_on_zscore_lens_percentages

Charts

Variance allocation plus article-level geometry in both PCA and distance-preserving MDS space.

Reference Table

Eigenvalue contribution and cumulative variance captured by each component.

Component	Eigenvalue	Explained	Cumulative
PC1	6.3443	52.8%	52.8%
PC2	1.5457	12.9%	65.7%
PC3	0.8296	6.9%	72.6%
PC4	0.6956	5.8%	78.4%
PC5	0.5106	4.2%	82.6%
PC6	0.4511	3.8%	86.4%

Loadings

The lenses contributing most strongly to the first two principal components.

Lens	Weighted Contribution	PC1	PC2
Omission and Silence Lens	0.0821	0.0194	0.6030
Linguistic Quality Lens	0.0783	0.2687	-0.2393
Hegemonic Common-Sense Lens	0.0776	0.2674	0.0367
Objectivity vs Opinion Lens	0.0730	0.2309	-0.4374
Causal Attribution Lens	0.0728	0.2860	0.2843
Entity-Level Sentiment Lens	0.0725	0.3471	-0.1873
Sentiment Clarity Lens	0.0712	0.3333	-0.1265
Emotional Intensity Lens	0.0711	0.2135	0.4760
Credibility Lens	0.0695	0.3592	0.0464
Agency and Voice Lens	0.0679	0.2998	0.1366
Authority and Source Positioning Lens	0.0641	0.3437	-0.0406
Epistemic Modality and Certainty Lens	0.0634	0.3265	0.0745

Source Geometry

Average source positions inside the leading component space.

Source	Count	PC1	PC2
BBC News	76	0.784	-0.386
Al Jazeera	72	-0.047	0.423
Fox News	72	0.159	0.861
PBS NewsHour	72	0.425	-0.427
CBS News	71	-3.376	0.382
NPR	71	0.445	-0.371
ABC News (Australia)	70	0.386	-0.132
NBC News	70	-0.957	-0.409
DW	67	1.216	-0.063
ABC News	44	0.461	-0.264
The Guardian	44	1.092	0.466

Diagnostics

Silhouette-like source separation measures for the latent representation.