Often it may be desired that multiple axes on a graph share a common range, or be related to one another by some algebraic expression. For example, a plot with wavelength λ
ν=c/λ
E=hc/λ
x=0
T
In this example we produce a plot of the temperature of the cosmic microwave background radiation (CMBR) as a function of time
t
z
t
H_0
Ω_M
Ω_
is used to make the highly non-linear conversion between time
t
z
H_0
Ω_M
Ω_
T=2.73 K/(1+z)