How to show principal component axis next to the original axis in IRIS data?

Hello I want to show principal component axis next to original axis (before rotation) in iris dataset for first 2 dimension but I don't know how. I attached an example photo. also my question is "What determines the magnitude of the principal component axis?"

Answer 1

[Image Analyst]

See attached demos

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[farshad jahangiri]

Thanks a lot it was very helpful for me.

[farshad jahangiri]

Hi again.I changed this code to 2 dimensionam Because in the 3D mode, I suspected that the axes of the PCs are not perpendicular to each other, and when I drew in the 2D mode, I observed that they are not perpendicular to each other. As you know, the axes of the PCs must be perpendicular to each other. can you help me ? @Image Analyst