| DC 欄位 |
值 |
語言 |
| DC.contributor | 統計研究所 | zh_TW |
| DC.creator | 傅維康 | zh_TW |
| DC.creator | Connor Wei Fu | en_US |
| dc.date.accessioned | 2023-7-26T07:39:07Z | |
| dc.date.available | 2023-7-26T07:39:07Z | |
| dc.date.issued | 2023 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=110225004 | |
| dc.contributor.department | 統計研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 在眾多視覺化方法中，t-隨機鄰近嵌入法 (t-SNE) 是相當有效且被廣泛使用的
技術之一。視覺上，t-SNE 有能力在 2 維或 3 維空間中呈現高維度資料集的結
構，然而，對資料進一步的解釋能力較弱。相對地，主成分分析 (PCA) 具有足
夠的解釋性，但視覺化效果較差。在本文中，我們提出一套新的方法。過程將
t-SNE 與 PCA 的概念做結合，旨在保留良好視覺化結果的同時，也提升資料的
解釋力。透過尋找與 t-SNE 分群相關的特徵，我們能夠得到用來解釋 t-SNE 映
射的主成分 (principal component)。這種方法除了提高 t-SNE 的解釋性以及應用
價值，也為資料視覺化研究提供了新的思路。在數值研究中，我們透過提出的
方法以及 PCA 方法獲得主成分進行資料降維，再重新執行 t-SNE 演算法進行視
覺化。視覺化的重建結果顯示，PCA 所找到的主成分無法有效還原 t-SNE 的映
射，而我們的方法不僅能夠重新還原，甚至能提供更優秀的視覺化效果。 | zh_TW |
| dc.description.abstract | t-distributed stochastic neighbor embedding (t-SNE) is one of highly effective and
widely used visualization methods. It is capable to visualize the structure of highdimensional data by giving each datapoint a location in a 2D or 3D map. However,
it lacks further interpretability of data. On the other hand, principal component analysis
(PCA) provides sufficient interpretability but yields inferior visualization. In this paper,
we propose a novel approach that combines the concepts of t-SNE and PCA to preserve
good visualizing results while keeping the interpretability of data. By searching for features that are correlated with the clustering performed by t-SNE, we can obtain dedicated
principal components for t-SNE. This method not only improves the interpretability and
applicability of t-SNE but also provides new insights for data visualization research. In
our numerical study, we use the principal components from our method and PCA method
to reapply the t-SNE algorithm for visualization. The reconstructed results demonstrate
that the principal components identified by PCA fail to effectively reproduce the mappings of t-SNE, while our method not only achieves successful reconstruction but also
offers superior visualization outcomes | en_US |
| DC.subject | 高維度資料 | zh_TW |
| DC.subject | 解釋性 | zh_TW |
| DC.subject | 主成分分析 | zh_TW |
| DC.subject | t-隨機鄰近嵌入法 | zh_TW |
| DC.subject | 視覺化 | zh_TW |
| DC.title | Principal Components on t-SNE | en_US |
| dc.language.iso | en_US | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |