# \#pca

**URL:** https://discourse.slicer.org/tag/pca/484.md

[Latest](https://discourse.slicer.org/latest.md) · [Categories](https://discourse.slicer.org/categories.md) · [Tags](https://discourse.slicer.org/tags.md)

---

## [Scalar-Weighted PCA](https://discourse.slicer.org/t/scalar-weighted-pca/40608)

<div class="topic-metadata">

**Author:** [@francois](https://discourse.slicer.org/u/francois)\
**Replies:** 0\
**Last updated:** [December 10, 2024, 3:45pm UTC](https://discourse.slicer.org/t/scalar-weighted-pca/40608 "2024-12-10T15:45:43Z")

</div>

Hello, I am looking at Foot CT scans. I have segmented each bone. I would like to compute the PCA axes of each bone, WEIGHTED with the scalar value of the voxels contained/overlapping each bone model. So the value for e…

---

## [Keep lung from different subjects has the same number of nodes/ landmarks](https://discourse.slicer.org/t/keep-lung-from-different-subjects-has-the-same-number-of-nodes-landmarks/32814)

<div class="topic-metadata">

**Author:** [@Chuan](https://discourse.slicer.org/u/Chuan)\
**Replies:** 0\
**Last updated:** [November 14, 2023, 5:29pm UTC](https://discourse.slicer.org/t/keep-lung-from-different-subjects-has-the-same-number-of-nodes-landmarks/32814 "2023-11-14T17:29:18Z")

</div>

Hi, I need to do the segmentation for lung in different subjects. And then I need to conduct principal component analysis (PCA). Because usually PCA needs the landmarks information, and every subject must have the same…