I have used the map function in the arduino code. ```
float val = (float)(map(samplse,0,1023,-3500,3500)/100.0);
`0 -35 2.61 0 5 35 ` Here I have taken calibration values from the sensor and plotted a graph. First when I use the power graph, I got **NAN x^NAN**. But when I use the calibration values with linear graph, I got **13.9909711599448x - 35.4904301757266**. My question is why in power graph, I am getting NAN. Then If I want to add the calibration values of linear graph in the arduino, how will I implement?