Group axis expression

[#1]

Hi,

I have a chart with a x-axis numbered from 1 - 200. Most every instance has a number of post related to it building different bars. Now I want to group the values in sets of 5. That is; I want the values 1-5 to be grouped, 6-10, 11-15, 16-20 and so on. This is only to relate to the x-axis. Ideas?

Cheers,

[#2]

i have been trying some like:

=class(1400 >> (today()-received_date) >> 1200, vBand)

but to no success...