What is this part of a graph on the axis called?

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SUMMARY

The zigzag mark on the Y-axis of a graph, which indicates a discontinuity where the value jumps from 0 to 130, is commonly referred to as an "axis break" or "graph break." Some sources also use the term "caesura," derived from Latin, to describe this symbol. The discussion highlights that while there is no universally accepted formal name, variations such as the "Tresman mark" have emerged in informal contexts. For visual representation, symbols like squiggles or slanted parallel lines are often employed.

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TL;DR
What is the zigzag mark on the axis of a graph called?
On this graph on the Y-axis just above the origin is a "zigzag" mark (highlighted with the red circle) which represents a discontinuity as the value of Y jumps from 0 to 130. Does this mark have a formal name?
graph symbol.jpg
 
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No.
 
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An axis break can be indicated using a variety of symbols, a squiggle, a Z, slanted parallel lines, etc. If you Google "graph axis break symbology", you can see a variety of symbols used.
1200px-Y-axis_break.svg.png
 
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iantresman said:
Summary:: What is the zigzag mark on the axis of a graph called?

Does this mark have a formal name?
I believe it is now called the "Tresman mark". :wink:
 
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berkeman said:
I believe it is now called the "Tresman mark". :wink:
Nope. It's direct current resistance.
 
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fresh_42 said:
No.
Oh. This was less funny than I thought it was.

I thought you were saying "It's called the nope".
 
FactChecker said:
Google "graph axis break symbology"
This was a fruitful search.

It yielded axis break and scale break. Also caesura.
 
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