get the value of a point by interpolation in R : <p>I need to get the value of temperature in a point (latitude, longitude) using the value of temperature of others points (latitude, longitude) by interpolation... I have the temperature of some stations (for exemple, 10, 40.01, 03.00 ....) in a csv file. 
I want to use only the values inside a radio from my point. How can I do that in R?</p>
