关于违反统计假设对化学"奥米克"数据的尺寸缩小的影响的见解,其中包含多个解释变量
Amber O Brown1,2, Peter J Green3,4, Greta J Frankham1,2
1Australian Museum Research Institute, Australian Museum, Sydney 2001, NSW, Australia.
ACS omega
|June 26, 2023
概括
生物挥发体分析是复杂的. 这项研究发现,包括多个变量并避免日志转换为挥发性数据提供了最保守的维度缩减. 这提高了识别重要化合物的准确性.
科学领域:
- 代谢学 代谢学 代谢学
- 化学信息学 化学信息学
- 生态生态学 生态生态学
背景情况:
- 生物挥发性分析由于高维度和复合峰值区域的广泛变化而带来了挑战.
- 当前的维度缩小方法通常假定数据的正常性和线性,这在生物数据集中经常被侵犯.
- 日志转换可以解决正常度偏差,但需要仔细考虑变量效应 (加法与乘法).
研究的目的:
- 评估统计模型 (单变量与多变量) 和日志转换对挥发性的维度减少的影响.
- 评估这些因素如何影响下游监督和无监督分类分析.
- 确定最可靠的方法来减少挥发性的维度,特别是复杂的生物样本.
主要方法:
- 来自带状背 (Tiliqua rugosa) 的挥发性数据在自然息地和囚禁中收集.
- 分析涉及单个和多变量统计模型,有和没有日志转换.
- 蒙特卡洛测试用于对转换和未转换数据进行维度缩小.
主要成果:
- 排除多个解释变量导致了对息地 (生物区域) 影响的高估和化合物识别的不准确.
- 日志转换和正常性假设增加了发现的重要化合物的数量.
- 通过多变量蒙特卡洛测试分析未经转换的数据,得到了最保守的维度缩小.
结论:
- 准确的挥发量分析需要考虑多个解释变量,并仔细考虑数据转换.
- 选择的尺寸缩小方法对生物相关化合物的识别有重大影响.
- 对未经转换的数据的多变量分析为复杂的生物挥发体提供了更可靠的方法.
相关概念视频
Biostatistics: Overview
285
Biostatistics plays a crucial role in understanding and analyzing data in healthcare and biology. Biostatisticians conduct experiments, gather evidence, and draw meaningful conclusions using statistical methods and techniques. Different variables form the foundation of biostatistical analysis, allowing researchers to understand and interpret data effectively. These variables are classified into different types, each serving a specific purpose in statistical analysis.
Discrete variables are...
Discrete variables are...
285
Correlation of Experimental Data
256
Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity,...
256
One-Way ANOVA
8.0K
One-way ANOVA analyzes more than three samples categorized by one factor. For example, it can compare the average mileage of sports bikes. Here, the data is categorized by one factor - the company. However, one-way ANOVA cannot be used to simultaneously compare the sample mean of three or more samples categorized by two factors. An example of two factors would be sports bikes from different companies driven in different terrains, such as a desert or snowy landscape. Here, two-way ANOVA is used...
8.0K
Mechanistic Models: Compartment Models in Individual and Population Analysis
65
Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least...
65
Statistical Methods to Analyze Parametric Data: ANOVA
444
Analysis of Variance, or ANOVA, is a powerful statistical technique used to analyze parametric data, primarily in research and experimental studies. It's designed to compare the means of two or more groups, assisting researchers in identifying any significant differences between these group means. There are two main types of ANOVA based on the complexity of the analysis: one-way and two-way.
One-way ANOVA is applied when a single independent variable or factor is scrutinized. It compares...
One-way ANOVA is applied when a single independent variable or factor is scrutinized. It compares...
444
Dimensional Analysis
923
Dimensional analysis is a powerful tool that is used in physics and engineering to understand and predict the behavior of physical systems. The basic idea behind dimensional analysis is to express physical quantities in terms of fundamental dimensions such as the mass, length, and time. Derived dimensions like the velocity, acceleration, and force are derived from the combinations of these fundamental dimensions.
Dimensional analysis allows us to analyze and compare physical quantities on a...
Dimensional analysis allows us to analyze and compare physical quantities on a...
923


