Help calculating wind turbine power, with a timeseries and a varying capacity factor

Essentially - I want to calculate the following equation for a timeseries of wind data. A wind turbine power equation

P=0.5*C*D*A*V^3

V is a variable, D and A are values. C is a variable, but only has 55 values, which vary with V, in 0.5 increments of V (0 to 27.5). The actual V-timeseries, each value has more decimals and is generally not a multiple of 0.5.

So how would I apply this varying C value to the equation, although the V-values are not multiples of 0.5. Thanks