Extract x-axis data point from a y-axis data point in a 2D plot, which is not in my input array.

Hi, I am plotting the performance curve of a motor, with time and speed on X and Y-axis respectively. I am able to plot the graph but I need to extract an x-value for a certain y-value (which is not in my input array) from the plot. Interpolate function is able to overlay another graph but I am not able to reach up to the exact x-axis value for a pre-evaluated y-axis value.

I have my X from 0.1 to 1.0, Y from 0.0 to 15.6 rpm. I need to evaluate (x) exactly for 14.04 value of y. Is there a specific way?

Answer 1

[KSSV]

yi = 14.04 ;
xi = interp1(y,x,yi) ;