# Questions tagged [partitioning]

A partition is an assignment of every element of a set into 1 & only 1 subset w/ no empty subsets. A common instance of partitioning in statistics is the partitioning of sums of squares for F-tests.

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### Seeking Lower Bound for Partition Probability in Random Variable Analysis

I am reaching out to seek assistance with a probability problem involving random variables. For each $p$ in $[1,\infty)$, consider positive random variables $X_{1,p}, X_{2,p}, \ldots, X_{n,p}$ such ...
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### a continuous analog for adjusted mutual information

I'm interested in comparing a set of electoral redistricting plans to, which can be conceived as partitions of an area. A measure like mutual information looks attractive. Let $U_i$ be a district from ...
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### Variance partitioning with crossed and nested factors: A simulation study

I'm working on a variance partitioning study, where I've simulated a dataset with crossed and nested factors. I have three predictor variables and one response variable. The first predictor is crossed ...
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### R glmertree: right variables for components? limit patitioning layers? adjust plot? result interpretion?

As a very beginner user, I have the following questions during my testing: 1. What are the suitable variables in the dataset for each of the components on the right side of the below tree formula? <...
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### MBRP(model based recursive partitioning) with R "glmertree" got error "subscript out of bounds, not all 'rhs' available" [closed]

Originally I ran multilevel regression on to exam how social network properties (SNPs) (e.g. degree, centralities, group size, group centralizations ...) affect individual's productivity outcome. Now ...
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1 vote
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### Pair confusion matrix for more than two cluster algorithms

How would one code the following issue: The columns represent the k groupings from the k cluster algorithms. The rows are the N(N-1)/2 pairs of data points. If an algorithm groups a pair together (i,j)...
1 vote
109 views

### Find p-values from varpart table in vegan package

I have conducted a variance partitioning in R with the vegan package to test how weather variables partition in the variance of the green-up day. ...
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### default plot for mob object (glm tree) not returned; using party package [closed]

I'm trying to plot a glm tree using the package party. Per the reference guide, the default plot of the terminal node should be a spinogram as in this image but I ...
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### Optimization program to allocate time series in 2 groups

I am trying to dispatch $m$ time series into 2 groups. Then I want to sum the value for each time steps, to obtain a sum per group. My goal is to minimize the standard deviation of the difference ...
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### Statistical test of fairness of partitioning

I have a question about a statistical test, but I lack the proper terminology so I'll try to explain in my own words. Say I have a collection of $N$ objects. The collection is partitioned into $p$ ...
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1 vote
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### Variation partition analysis: morphology-climate correlation, controlling for geography

I'm working with three datasets with informations about individuals: morphological data, climatic data of the individual sampling site and geographical data. My objective is to assess whether ...
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1 vote
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### Cluster/partition by time

I have a dataset of different events in time. I want to group/cluster/partition the data by datetime. A small example of the time of the data might be: [19-09-2018 12:00, 19-09-2018 12:01, 19-09-2018 ...
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### Estimation of partitioning error in next-generation sequencing experiments

[Edited: explanation of the partitioning error] I would like to estimate how the initial number of molecules (or the level of gene expression) affects reproducibility between technical replicates of ...
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### Adjusted Rand Index with different size inputs

Forgive me if my terminology is off, this concept is somewhat new to me. I'm trying to run an ARI calculation between two partitions which contain a different number of clusters, where each cluster ...
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### Appropriate partition region in a decision tree?

I have the following partition region for a decision tree, but I do not think it is a valid region: $R=(\vec{X}=(X_1, X_2, ..., X_p)^T\in \mathbb{R}^p: X_1X_2 \geq 3)$ I feel that this is not a ...
520 views

### Predictors in random Forest

I am building a random forest to predict a binary variable y. I have several predictors named x1..n. One predictor, lets say x1, is a very strong predictor of y but only in some cases (see below) ...
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### Estimates for k-d tree partition cells and for Voronoi partition cells

Let us have a $k$-d tree in a unit cube in ${\mathbb R}^k$. Let the points of the tree in the cube be i.i.d. with some density bounded away from 0. How can I estimate the volumes of partition ...
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### How to partition set of items into subsets with similar mean, variance and number of elements - looking for some help

Short version: Given I have a list of 120 traits (happy, sad, etc.) evaluated on a number of scales ranging from -5 (for example highly negative) to +5 (for example highly positive), how can I group ...
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### Possible explanations for Imputation before train-test split?

I'm working on a real world data set containing missing information. I understand imputing missing values before data partitioning can lead to leakage of information. I'm using this R package MissMech ...
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### Clustering restaurant dishes

I have data about restaurants, their dishes and customer's orders. Then I want to cluster dishes in restaurant's menu by customer order. So clusters will be dishes in order and criteria of similarity ...
1 vote
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### Cluster non-vector data based on similarity rating

I have a list $S$ of $N$ non-vector elements (in this case words or concepts), and I'd like to partition them into k subsets of similar words. For each pair $(a,b)$ with $a,b \in S$, I have a number ...
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### What statistical methods should i use to identify segments in a population according to a response variable?

Assuming I have $p$ uncorrelated explanatory variables $(X_i)_{i=1...p}$ and one binary response variable $Y$, such that : \log\left(\dfrac{P(Y=0|X)}{1-P(Y=0|X)}\right)=1_{\{X_1>0\}}\sum_{i=2}^p\...
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### How is graph clustering performed? [closed]

When we do graph partitioning or graph clustering how does one give the graph as input? Is it by means of an adjacency matrix? What if the graph is very large?
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### Is it compulsory to partition data in training and testing for time series modelling?

Is it compulsory to partition data in training and testing for time series modelling ? The reason for asking this question: Lets say training data= first 80% observation of actual time series data(...
1 vote
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### Smart sampling to learn a space partitioning

Given a compact feature space, I want to partition the space according to some classification. The first method that comes to mind is to use SVMs. For the classification I have in mind, the space ...
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### Valid to supply unique features to each fold of k-fold Cross Validation?

I have a dataset of n = 55 samples with 300,000 - 600,000 features for each sample. I am trying to train a model (ksvm classification) to predict the class of each sample. N = 26 of the samples are ...
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### Partitioning with cross validation?

I am new to data analytics having only started exploring the field this week. I have downloaded KNIME and am working with a single dataset to try out different classification algorithms. I am ...
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