How can i get intermediate value from a loglog graph

I had a log log curve with set of points . After plotting how can i get a Y output for given X which is an intermediate value of input.

X 10 200 400 1000 2000

Y 0.003 0.003 0.01 0.01 0.0025

Can i get Y output for 1780?

Answer 1

[Adam]

doc interp1