Matrix too large — what now?

Short Answer

Picasi caps Matrix views at a manageable size so they load quickly and stay readable. When the limit is hit, tighten the time range, granularity, or filters — the error message names the exact limit and current value.

Details

The error message looks roughly like this:

The matrix would exceed the limit for cells (12500 > 5000). Please narrow the filters.

It tells you two things: which dimension is too large (rows, subgroup rows, columns, or cells) and how large it would currently be.

Too many cells — usually a coarser granularity solves it. Switch from day to week or from week to month. That halves the column count without losing trend information.

Too many rows — happens with views that show sources individually. Two ways out:

Set a filter — for example restrict to a specific Source tag.
Switch to an aggregated view — for example Source tags over time instead of Sources over time.

Too many subgroup rows (child_rows) — happens with hierarchical views. Pick a flat view or narrow the categories with the Source tags filter.

Too many columns — usually the time axis. Shorter range or coarser granularity.

When that does not help

If you still hit the limit with a tight range and few sources, chances are you have configured a lot of tags. Check the Filters popover to see whether a smaller selection under Source tags or Update tags helps.

For very broad analyses the Matrix is not the right tool — that is what the AI reports from the Inbox are for. They aggregate instead of listing.