What ⧮ means
A measured value plotted with its uncertainty range. On a chart of experimental results, each point is drawn as a small marker, and a line through it runs from the lowest to the highest plausible value; the short caps at the ends are the error bars. The longer the bars, the less precise the measurement.
Hollow and filled squares, diamonds and circles tell different data series apart, so the set has six members. In text, ⧮ lets a caption say which marker belongs to which series without an image. The set reached Unicode through a 2000 proposal from the STIX project, a joint effort of scientific publishers to build fonts covering mathematical and technical notation.
Part of collections
Related characters
3
Questions people ask
1Is ⧮ a sign for an error or warning?
No. Here 'error' means measurement uncertainty, as in statistics, not a computer error. The symbol shows a data point and its range of uncertainty.
More like this
9
How to type or find ⧮
- Also called
- error-bar square · hollow square with error bars
- Search it as
- error bar symbol · square with error bars · data point with error bars · errbarsquare · U+29EE · error bar marker
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⧮\29EEunicode-math package loaded, write \errbarsquare in math mode.⧮ in the page source.29EE, then press AltX.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.