Someone gave me a chart, which I have to implement in to the application. When I started to analyse it I noticed, that it has got different spacing between values. For example spacing between 0 to 5 value is 8mm, but from 5 to 10 only 5mm, then from value 10 to 40 spacing is 3mm (the interval is 5) and from 40 to 160 it's 3mm. Does anybody know the mathematic name of this case? I was googling for 'non-linear chart scale' but it gave me nothing.