Read the Two Views

The level plot keeps the original values: 4, 7, 5, 9. The change bars answer a different question. They show the size of each move after the first point: 3 from t1 to t2, 2 from t2 to t3, and 4 from t3 to t4.

A tiny EDA view: plot the same pinned time-series levels as dots, then plot absolute period-to-period changes as bars.

highlighted = computed this step

Pinned levels and changes

Start with exact levels, then compute each period-to-period change magnitude.

levels and changes\text{levels and changes}
Pinned Levels and Change Magnitudestlevel|change|t14t273t352t494

Level dots

Dot marks show the level at each time label.

level dots\text{level dots}
Levels as dot markstimelevel02468104t17t25t39t4

Change magnitude bars

Bar marks show how large each step-to-step change is.

change magnitude bars\text{change magnitude bars}
Period-to-period change magnitudes as barsending periodabsolute change0123453t22t34t4