Questions tagged [scatterplot]

Pairs of (x,y) values plotted as points in Cartesian coordinates. Widely used as an exploratory and diagnostic tool.

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3
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0answers
535 views

Making sense of PCA and t-SNE representations

I am wondering what (qualitative) sense one can make from PCA and t-SNE plots of weights in a neural network. I'm training a neural network that regresses five different control values, including a ...
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1answer
41 views

Scatterplot dovetailing?

I have modeled counts of health factors at the census tract level geography. When I plot these counts against each other (example: smoking vs. heavy drinking) I get a weird scatterplot output. The ...
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0answers
50 views

Fitting an interpolating spline to show mean of interaction on cloud plot

I am surprised to not be able to find a straight forward answer to my scenario. I have created a series of mixed effects models using lme4. I am trying to plot the data in ...
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1answer
3k views

How do I know what side is skewed? [duplicate]

If I look at a quantile plot comparing normal distribution and other data, and some of the points lie below or above the line, how do I know what that represents? What I am asking is - how do I know ...
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1answer
356 views

What is the difference between a Lag plot and a Poincare plot?

So I recently came across Poincaré plots (Wiki) which plots x(t) against x(t+1). Thereafter I found out about lag plots (Description)which seem to do the same thing just the other way around, i.e. x(t)...
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1answer
569 views

Researching non-linear correlations through scatter matrix

I am trying to understand the correlations among three explanatory variables of commercials and response variable sales through the scatter plot matrix. It seems like there are non linear ...
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2answers
419 views

How to Draw an Ellipse around a Specific Portion of a Probability Density Function

I currently have a 2D probability density function and need to draw a 2D ellipse that circumscribes 50% of the probability "mass" (if that is the right terminology). I see lots of articles on how to ...
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1answer
3k views

What are the axes of a t-SNE scatterplot? [duplicate]

What do the values in the x axis and y axis of this scatterplot correspond to? It is related to t-SNE but I don't know how. The plot is from: Lingren T, Chen P, Bochenek J, Doshi-Velez F, ...
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1answer
4k views

Why jitter continuous value in a scatterplot?

I'm using Orange Canvas and I generated a scatter plot. I have the possibility to jitter continuous variables but I really don't know why would I do that. What's the idea behind jittering?
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2answers
799 views

Solution to force a polynomial curve to end at a specific location

I require a solution (Python if possible) to force a polynomial to end at a specific point. I have read the solutions offered here to a similar question but have been unable to get any of these ...
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2answers
779 views

How to interpret linear regression in scatter plot

I am trying to understand the relationship between $2$ variables in $4$ different subgroups. I would like to decide if the variables are correlated in a different way depending on the subgroup. For ...
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2answers
257 views

Can we select features by examining scatterplots?

Suppose, I have a data set with eight features in my hand. I want to find features to predict the diamonds, hearts, clubs, spades. ...
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2answers
154 views

Fit a regression model to the data

A scatter plot is drawn to represent the relationship between response variable y and the predictor variables ‘x’, which is continuous and the indicator variable z which encodes the membership of ...
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2answers
798 views

Interpreting a scatter plot of ranks with a particular structure

I am conducting correlation analysis on variables that I cannot assume to be normally distributed, so I am using Spearman's rank correlation instead of Pearson's. The two variables do not seem to be ...
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1answer
128 views

annotate a bubble chart

Is there a proper or ideal way to annotate a bubble chart outside of what is required for a standard 2-variale scatterplot? The bubble area is supposed to be associated with the 3rd variable, but ...
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1answer
750 views

Generating scatter plot before doing the Spearman's rho

Do I have to generate a scatter plot to check for the monotonic relationship between two ordinal variables before carrying out the Spearman's rho? And how can I interpret this scatter plot? I ...
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1answer
749 views

Plotting a frequency distribution with count and score (precision) for the frequenct

I have a dataset of a million documents. I took the frequency distribution of the documents based on the number of words in it. I also have the precision results for each document. Now I want to show ...
2
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1answer
55 views

Black and white 3D scatterplot?

For any $i \in \{1,2,\ldots, 9801\}$, we have 3 dimensional vectors $\mathbf{a}_i$ and $\mathbf{b}_i$ that take values in $\mathbb{R}^3$, where $\mathbf{a}_i = (a_{i,1}, a_{i,2}, a_{i,3})$ and $\...
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2answers
3k views

Using Linear Regression on text data

I am trying to create a model that predicts an author's age. I'm using (Nguyen et al, 2011) as my basis. Using a Bag of Words Model I count the occurrences of words per Document (which are Posts from ...
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1answer
1k views

How do I sketch (on paper) the scatter plot with given covariance matrix and expectation vector?

I have found some information concerning my problem, but I am too unfamiliar with statistics to fully grasp the concepts explained. Also, much of the explanations are written for python/Matlab/R code, ...
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1answer
87 views

Do I have a correlation here or not?

I am writing my thesis at the moment and I am pretty new with statistics. I tired to google around but I don’t know what to do anymore, since I don’t really find an answer in this case. I hope you can ...
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3answers
1k views

Pattern detection in scatter plot

Below is a scatter plot (capped at $10k) representing the average donation a project receives vs the word count of the funding request essay for all projects represented in the open Donors Choose Data....
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0answers
164 views

Which version of the Tukey mean-difference plot is more convenient?

I have a single parameter measured by two methods: A and B. I need to see how these two methods compare against each other, so ...
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1answer
178 views

Fit circle of fixed diameter over most dense area of scatterplot [closed]

I am looking for a function that would help make a circle (of fixed diameter) over the most data points (highest density) on a two-dimensional scatter plot. I was hoping someone would at least point ...
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1answer
711 views

Does this residual plot indicate heteroscedasticity?

These are two versions of the same residual plot, just with a different scales, (I'm not sure which is easier to interpret so I included both). I don't need to know major details (for the assignment ...
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1answer
877 views

Using a zero slope coefficient predictor variable in multiple regression

I ran multiple regression with three predictor variables, which according to the theory I am using, should all predict the dependent variable. However, one of the variable's partial plot shows what ...
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2answers
552 views

Given a scatterplot, is it possible to determine the probability that a new data point will land in a certain region of the graph?

I was asked to determine the probability of a new data point landing in a certain rectangular region on the graph given other data points that make up the scatterplot. If that is not possible, is it ...
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1answer
3k views

What is the point of lag plots and autocorrelation plots?

Most people seem to argue that lag plots and autocorrelation plots are useful for determining whether some univariate time series data is random or not. I feel like I could accomplish this task by ...
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1answer
1k views

Is there a name for a scatter plot which compares predicted vs observed values?

I have a scatter plot which compares predicted vs observed values. What is the appropriate name for this type of plot? To elaborate, I have a set of measurements for a specific engineering quantity ...
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0answers
1k views

Stata: plotting the random+fixed effects of slopes after multilevel models are fit with `xtmixed`

I am fitting a linear multilevel model of the following form: Y = b0 * X0 + b1 * X1 + b2 * X2 + b3 * X3 + u b0 = e0 b3 = e3 The units in the first level are ...
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1answer
29 views

How to get real value from log adjustement value

I am looking for some data for my research, and found reliable graph which showed the correlation of fetal weight and gestational age which is what I want. However, the weight in that scatter plot ...
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1answer
2k views

Scatter plot with two factor variables for black and white print

How can I best represent a scatter plot with two different factor variables. Consider the example problem, ...
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1answer
359 views

Is my scatter chart random

I used =RAND()*500 in Excel and added to a scatter chart: How can I know if it is indeed Random?
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0answers
141 views

Two-dimensional mean/95% LOA plot

I have a data set consisting of automated versus manual segmentation of images. For a given measurement point, comparison between the automated and manual method are reported via Jaccard coefficient ...
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0answers
374 views

Plotting a quasi-poisson regression [duplicate]

I have a quasi-poisson regression model for analysing the correlation between academic prestige and bulic visibility. I have a set of independent variables - continuous and dummies in this model. I ...
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1answer
43 views

Choosing a model for a relationship between academic prestige and public visibility

I have data frame in which I would like to analyse the correlation between academic prestige (factor analysis scores) and public visibility. These scatter plots reveal different patterns in the ...
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0answers
71 views

How to demonstrate a third quantitative attribute in a scatter plot effectively

I am trying to create a scatter plot that illustrates the relationship between x and y with a third quantitative attribute, z. However, I have a couple of constraints: I do not want to use ...
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1answer
2k views

What does this scatterplot mean? Uniform distributions? [closed]

I am very new to statistics and prob theory: I am looking at a scatter plot of two random variables, both uniformly distributed on $(0,1)$. The plot is approximatively a straight line, and the book ...
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0answers
317 views

TReading Residual Plot: Omitted Variable Bias of Dummy Variable

I have a plot of the residuals versus fitted values of an OLS model such that the shape of the plot are two identical randomly scattered clouds, one above and one below the $\hat{e} = 0$ line. Can I ...
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1answer
98 views

What type of relationship is in this scatter plot

I am plotting the number of accidents happened daily vs the daily precipitation for Car collision data of New York City for the year 2013 using scatter plot. I found a strange chart which I am not ...
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1answer
45 views

Significance for difference of points on an (x,y) grid

I have a set of data consisting of (x,y) points, divided among 4 groups. What technique is most appropriate for deciding whether groups are significantly different? It's probably OK to use the ...
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2answers
60 views

Help Interpreting These Scatter Plots

I've calibrated multiple times a model with three parameters: $a$, $b$ and $c$. I graphed each pair of resulting parameters to get an idea of the correlations and got these very strange plots: Here ...
6
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1answer
7k views

Plotting the results of GLM in R

I have this data plotted as a scatter plot in Excel: I had done a regression in Excel, and the p value was 2.14E-05 while the R- value was 0.32. I was told the R value was too low compared to the ...
5
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1answer
464 views

Is a Restricted Boltzmann Machine appropriate for predicting a vector?

I have a very large set of animal migration data, consisting of many series of vectors - each series is basically a path of a single animal. The dataset I'm using consists of 244 of these series. I ...
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0answers
378 views

Problem using funnel plot to detect outliers

I am trying to detect outliers from a list of genes. Each gene has x number of SNPs, plotted on the X axis, and a score derived from the mean score of each SNP in a test, plotted on the y axis. My ...
2
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3answers
6k views

Detecting outliers along the distribution in a scatter plot

I have a distribution represented as a scatter plot (see image below). It is clear to me from looking at the plot that there is an L shaped curve that describes most of the data. I am interested in ...
2
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1answer
886 views

Scatterplot matrix in R on iris dataset not very clear

I am tryin to generate some scatterplot matrices in R using IRIS dataset. First I do this: data(iris) cor(iris[,1:4]) This gives a nice symmteric matrix: ...
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0answers
18 views

Model to quantify 'enabling' properties of variable

From a large-scale patent analysis, I have some results which can be shown in a graphic but I would like to capture them in a model somehow, to be able to quantify a fit. The scatterplot below (in ...
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0answers
632 views

Techniques for plotting PCA projections in more than three dimensions

After running PCA on my data set, I noticed that using the three first eigenvectors, a separation between two different classes is still achievable (doing PCA on data from two classes). Unfortunately, ...
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0answers
70 views

Interpreting scatterplots

I am working with an agricultural data with the aim to establishing bean-lines that are resistant to bruchid infestation. I want to find the relationship between some variables (mostly number of holes ...