Compare against a baseline¶

The Results table can show each value's change, or delta, from a baseline. By default each Attitude is compared with its own Run's baseline. You can also pick a temporary baseline for the whole table.

Before you start

Load a table View on the Results page.
Deltas are only shown for columns with Inline Delta turned on (see how deltas are shown). New columns start with it set to Hide.

Two kinds of baseline¶

	The Run's own baseline	A table delta baseline
Set	When the Run is created, with Baseline Run	On the Results page, with Set Delta Baseline
Applies to	That Run's Attitudes	Every row in the table
Lasts	Saved with the Run, for everyone	Until you clear it or change Project. It isn't saved with the View

A table delta baseline overrides the Runs' own baselines while it's set. Clear it to go back to them.

The Run's own baseline¶

When you create a Run with a Baseline Run, each Attitude is compared with the Attitude on the Baseline Run that has the same Map item name. For a Run without a Map, it's compared with the Baseline Run's Attitude that has no Map item. Attitudes with no match show no delta.

The Run's own baseline is also what the Row & Baseline selection mode selects, and what Base_ variables use in custom calculations.

Set a table delta baseline¶

On the Table View card, click Set Delta Baseline. The Choose Deltas dialog opens.
Choose a Delta Mode: Attitude, Run or Map Relative (see below).
Choose the baseline:
- Attitude or Map Relative: pick a Run under Select Run, then an Attitude under Select Baseline Attitude. If the Run has only one Attitude, it's picked for you.
- Run: pick a Run under Select Baseline Run.
Click Set Baseline.

The lists only include Runs that are loaded in the table. The results reload with the new deltas, and the Set Delta Baseline button is highlighted.

Shortcut: right-click a row and choose Set as Delta Baseline (Attitude mode), Set Run as Delta Baseline (Run mode) or Set Attitude as Map Relative Delta Baseline (Map Relative mode).

To clear it, click the red X next to Set Delta Baseline, or clear the choices in Choose Deltas and click Clear Baseline.

The table delta baseline is temporary. It isn't saved with the View, and it's cleared when you change Project. Set it again each time you need it.

Delta modes¶

Mode	Each row is compared with
Attitude	The one Attitude you chose
Run	The Attitude on the chosen Run with the same Map item name. Rows with no match, and the chosen Run's own rows, show no delta
Map Relative	The Attitude in its own Run with the same Map item name as the Attitude you chose. Runs without one show no delta

Run mode suits comparing Runs that use the same Map. Map Relative mode shows how the Attitudes develop within each Run, for example every point compared with its Run's first point. It only lists Attitudes that have a Map item, and shows "This case has no linked map" if you right-click one that doesn't.

For example, with Run 1 and Run 2 both using a Map with Attitudes A, B and C:

Row	Attitude (Run 1 - A)	Run (Run 1)	Map Relative (A)
Run 1 - A	Baseline	-	Baseline
Run 1 - B	vs Run 1 - A	-	vs Run 1 - A
Run 2 - A	vs Run 1 - A	vs Run 1 - A	Baseline
Run 2 - B	vs Run 1 - A	vs Run 1 - B	vs Run 2 - A
Run 2 - C	vs Run 1 - A	vs Run 1 - C	vs Run 2 - A

Expand the extra information in Choose Deltas to see a similar example for each mode.

In Map Relative mode, the matching Attitude of each Run must be among the loaded rows. If a Run shows no deltas, load more results.

How deltas are shown¶

Deltas appear in brackets after the value, for example 0.312 (-0.004). Set how each column shows them in Column Options (see format columns):

Option	Setting	Shows
Inline Delta	Hide	No delta (the default for new columns)
	Show	The delta, uncoloured
	Positive Green \| Negative Red	Increases in green, decreases in red
	Positive Red \| Negative Green	Increases in red, decreases in green
Percentage Delta	Ticked	The delta as a percentage of the baseline value

A delta of zero is never coloured. Deltas use the column's rounding, Scaling Factor and Inverse Value. For columns with Percentage Value on, the delta is in percentage points.

To override every column for a quick look, click an icon under Delta Units on the Table View card:

%: shows every delta as a percentage.
#: shows every delta as a number.

The override also shows deltas in columns set to Hide. Click the icon again to turn it off. It isn't saved with the View.

Other things to know:

The baseline row is highlighted in yellow (orange in dark mode) and shows no delta. In Map Relative mode, each Run's baseline row is highlighted.
Deltas are shown for forces, moments, balances, other monitors and custom calculations. Parameters have no deltas.
If either value is missing, there's no delta.

For deltas between postpro images, see generate image deltas.