Editing Logarithmic scale (section)

=== Extensions ===
A modified log transform can be defined for negative input (''y'' < 0) to avoid the singularity for zero input (''y'' = 0), and so produce symmetric log plots:<ref name="Webber2012">{{cite journal | last=Webber | first=J Beau W | title=A bi-symmetric log transformation for wide-range data | journal=Measurement Science and Technology | publisher=IOP Publishing | volume=24 | issue=2 | date=2012-12-21 | issn=0957-0233 | doi=10.1088/0957-0233/24/2/027001 | page=027001| s2cid=12007380 | url=https://kar.kent.ac.uk/32810/2/2012_Bi-symmetric-log-transformation_v5.pdf }}</ref><ref name="Matplotlib 3.4.2 documentation 2021">{{cite web | title=Symlog Demo | website=Matplotlib 3.4.2 documentation | date=2021-05-08 | url=https://matplotlib.org/stable/gallery/scales/symlog_demo.html | access-date=2021-06-22}}</ref>
:<math>Y=\sgn(y)\cdot\log_{10}(1+|y/C|)</math>
for a constant ''C''=1/ln(10).