I want to get the amplitude, phase and frequency at a point (yellow cross) on the FFT of the \mathbf\pi number drawing below:

I know now that there is a frequency of 3.63 \text{ pixels / cycle}, running across a diagonal line at 53.94^\circ, and the combined magnitude is probably part of the output on the menu bar: \vert X[k]\vert=\sqrt{X_\text{Re}^2+X_\text{Im}^2}= 119 (?).

To get the phase I need to get the complex plot, and calculate the \arctan\left(\frac{X_\text{Im}}{X_\text{Re}}\right).

So here we go… I get this additional Re/Im plot:

But now I have no idea where to place the yellow cross to make it correspond to the initial yellow cross above. Further, I don’t know if I have to get the x and y here, or on the real or imaginary plots: