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

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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?"

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Image Analyst
Image Analyst 2022 年 12 月 21 日
See attached demos
If you have any more questions, then attach your data and code to read it in with the paperclip icon after you read this:
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farshad jahangiri
farshad jahangiri 2022 年 12 月 22 日
Thanks a lot it was very helpful for me.
farshad jahangiri
farshad jahangiri 2022 年 12 月 23 日
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

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