I'm trying to plot a function with units. The function is:

f(x)=k.2*x^2+k.4*x^4

And the units are:

k.2 in N/(m/s)^2
k.4 in N/(m/s)^4
x in m/s

So, the function evaluates to units of N.

I can plot each component of the function separately. I.e., I can plot k.2*x^2 or I can plot k.4*x^4. But, when I try to plot the entire function (k.2*x^2+k.4*x^4), no curve appears. How do I fix that?

(For anyone who's curious, this is a hypothetical drag curve for a full-displacement hull.)

Another option is define the units for x:



Regards,

Oscar