Questions tagged [data-visualization]
Constructing and interpreting meaningful and useful graphical representations of data. (If your question is only about how to get particular software to produce a specific effect, then it is likely not on topic here.)
3,102
questions
1
vote
0
answers
22
views
Bishop Gaussian Basis
In Pattern Recognition and Machine Learning by Christopher Bishop he says in Section 3.3.2 titled Predictive distribution
If we used localised basis functions such as Gaussians, then in regions away
...
- 11
0
votes
0
answers
16
views
How to preview plots in R Notebook? [closed]
I'm trying to plot a correlogram and periodogram for my dataset in R Notebook, as if I understand correctly, R Notebook offers the feature to preview plots without having to knit unlike R Markdown. ...
- 43
12
votes
3
answers
674
views
Visual assessment of scatterplots acceptable?
I have a fairly basic question about analyzing a dataset of measurements taken on a number of fish, which I’m doing as part of a student project. So I have measurements of four species of fish of ...
- 123
14
votes
5
answers
2k
views
In what instances are 3-D charts appropriate?
All the data analysis-related texts I have read over the years recommend against using three-dimensional charts in almost all cases. To quote one of them, "Never use a 3-D chart when a two-...
- 241
0
votes
1
answer
34
views
How to derive points for each variable in nomogram by hand?
I'm dealing with nomograms at this time, but I don't really understand how to derive the exact points for each variable by hand (or in a mathematically way).
To be concrete, I brought a simple example:...
unicorn
1
vote
1
answer
17
views
How to visualise the value of one predictor in a multiple linear regression
I'm looking for confirmation on whether the approach I have is statistically correct / straightforward, and if there might be any references supporting this line of thinking on how to visualise ...
- 31
5
votes
2
answers
68
views
Interpreting random effect in GAM output: gaussian quantiles
Model runs are fine. Interpreting effects is easier for factors. What is not straight forward are the outputs/plots for variables with factor levels assigned a random effect. The plots I am trying to ...
- 109
1
vote
0
answers
14
views
Discrepancy in MSE Cell Frequencies and Entropy Estimation for Various Estimators
I've been trying to replicate the results from the paper "Entropy Inference and the James-Stein Estimator, With Application to Nonlinear Gene Association Networks" in R. The goal is to ...
2
votes
0
answers
61
views
Is It Okay to Scale up Principal Component Analysis Loadings to Fill the Plotting Region When Plotting Principal Component Analysis Scores [duplicate]
I have the following plot, where I've plotted principal component analysis scores.
I overlaid the loadings in the plotting region, but they're all very short and you can't see the loadings nor their ...
- 277
1
vote
0
answers
30
views
How to tell if an interaction term should be included based on residual plot?
Applied Linear Regression Models says:
Also, residuals
should be plotted against interaction terms for potential interaction effects not included in
the regression model, such as against $X_1X_2$ , $...
- 11
1
vote
1
answer
40
views
How to plot posterior marginal means for categorical variables?
I ran this model. Each categorical variable has three levels. How can I plot the results such as posterior marginal means for each six levels by country?
...
- 365
0
votes
0
answers
10
views
Best Approach to Smooth ETA Transitions in Delivery Prediction Models
I'm working on displaying the ETA (Estimated Time of Arrival) for an item delivery using a predictive model that evolves over time. The issue I'm facing involves smoothing the transition between ...
- 23
2
votes
1
answer
42
views
Plotting/modelling a histogram with large bins of small values
I'm wondering some best practices or approaches for data where, for example, as in the below image the low value bins are most common, but you are interested in the whole distribution.
Here is a ...
- 121
1
vote
2
answers
59
views
Relative vs. absolute error bars in log-scaled plots
There's conflicting info from seemingly knowledgeable sources about the correct way to show error bars on a log-scaled plot.
$log_{10}(x \pm \Delta x)$ shows the absolute error. On the one hand, it's ...
- 165
4
votes
3
answers
431
views
Any tips to differentiate zero and non-zero values on a map with a continuous color scale?
This is more a theoretical/best practices question than a practical one, but imagine I have to make a map with points representing cities, and some variable is tied to the points color. The value ...
- 51
7
votes
3
answers
465
views
I think standard deviation of y is related to size of x. How do I create a model for this / test this?
I have a sample of data $(x_i, y_i)$. I hypothesize that $y_i$ is not dependent on $x_i$, but the standard deviation of $y_i$ depends on $x_i$
More concretely, say I assume $\textrm{Var}(y_i | x_i) = ...
- 716
1
vote
0
answers
48
views
seeking suggestions for visualizing relationships between extracted topics and ratings in R
I have a set of product online reviews data. The dataset contains review text and 1-5 star ratings.
I've extracted 5 prevalence topics using R stm package. They are price, design, packaging, promotion ...
- 63
0
votes
1
answer
42
views
Plot Hazard ratio, 95% CI with a continous variable
Can R generate some figure like this?
x-axis=age(continous), y-axis = hazard ratio for each count?
Our dataset: mydata, event=death, time to event=years, var=age, group=treatment(1) vs control(0)
0
votes
3
answers
81
views
False Negative vs False Positive for Multiclass classification
Suppose I have three classes 1,2,3.
And there's evaluation like below, where second element is false prediction where model predict class 3 while ground truth is 2.
...
0
votes
0
answers
58
views
How can i make a simple visualization of my result from a two way fixed effects regression model?
I am trying to understand the effect of the variable x1 on the dependent variable y1, and for that i have panel data. I decided to use a two way fixed effects model to estimate the effect of variable ...
2
votes
1
answer
36
views
Representing growth in learning outcomes
The average score of my class of students at the beginning of the year was 50/100 and at the end of the year, it was 80/100.
The percentage growth is 60%.
Can I write there is 1.6x growth in average ...
- 191
2
votes
3
answers
111
views
How to work out the expected rate of success when there is a guaranteed success on the nth attempt?
I'm looking to work out how to find the expected success rate when given the rate of success but, also after n-1 failed attempts, there the success rate is 100% for the nth attempt.
Intuitively I ...
- 21
0
votes
0
answers
63
views
How to express the uncertainty in the OR of a right-tailed Fisher's exact test?
Many OR (odds ratio) visualizations show 95% confidence intervals expressing uncertainty like on the left panel in figure below.
However, in genomic overrepresentation analysis right tailed Fisher ...
- 888
1
vote
1
answer
205
views
Best solution was not repeated - no reliable result for metaMDS?
I have abundance data of spiders that I captured in different forest stands and I want to perform an NMDS. It generally works, although the stress value is relatively high. However, I get the message ...
- 59
0
votes
1
answer
23
views
Parallel Mediation Model Diagram
I am building a parallel mediation model diagram but am not sure what one of the numbers signifies despite 30 minutes of Goolging.
The number in question is what's in the parenthesis for the c' path —...
- 11
0
votes
0
answers
19
views
I want to plot the decision boundaries of an SVM model with more than 2 variables
I understand that that is impossible to visualize, so I went in and PCA-transformed the variables. The problem is that I still need more than 2 principal components to get "good" ...
3
votes
2
answers
89
views
Intro to Stats- professor's mistake in an exercise on types of diagrams?
The Question
Parking at a university has become a problem. University administrators are interested in determining the average time it takes students to find a parking spot. An administrator ...
- 133
2
votes
1
answer
41
views
In general, does $P(R|N)>P(R)$ implies $P(N|R)>P(N)$ ? Seems to be confirmed by Venn diagrams example but contradiction with Bayes' theorem
Let $R$ and $N$ be two dependent events, such that $P(R|N)>P(R)$. Does this implies that $P(N|R)>P(N)$? The odds are this is true (and equivalently $P(R|N)<P(R)$ implies $P(N|R)<P(N)$). I ...
- 189
0
votes
0
answers
71
views
What do people call such a chart with a strip of activity types per time?
What do people call a chart like that below which has days on Y axis and time of the day on X axis while color represents a kind of activity (data gathering, processing, etc.)?
It is very close to ...
- 193
9
votes
3
answers
778
views
What do people call a chart with a strip of peak values in time intervals?
What do people call a chart like one below which has days on Y axis and time of the day on X axis while color represents the level of some value (for example, loading, usage count, etc.)?
The chart ...
- 193
0
votes
0
answers
23
views
RDA analysis in R
I'm working with foraminifera diversity in the Arctic on my master thesis. I want to look at how environmental variables are affecting the species variation, so I'm using RDA. This is my code:
...
1
vote
1
answer
64
views
Visualizing restricted cubic splines in glm.nb
I am trying to visualize the relationship between a continuous variable ("marker") and a count variable ("count") using a negative binomial regression with a restricted cubic ...
- 51
1
vote
0
answers
31
views
Plotting model-adjusted baseline values of change scores
I know using change scores to evaluate a treatment effect on an outcome in an RCT is frowned upon by some. But I'm interested in knowing what people normally do when it comes to plotting the model-...
- 833
1
vote
1
answer
50
views
Intensity outliers/anomalies in 2D plot
I wonder what kind of method better to use to see outliers on z value of 2D plot. For example, I have measurements of x and y values both in range of 1 to 16 with step of 1. Next I calculate how many ...
- 11
0
votes
0
answers
18
views
What's the best visualization for an accuracy vs. enum list plot?
I have been training my DL model with different permutations of features and have been logging the results.
On on column is accuracy, just a scalar float.
On ...
- 101
1
vote
0
answers
68
views
Event study: Group periods at margins
For an event study (staggered Diff-in-Diff with different treatment periods) I would like to group the periods at the edges so that we get the coefficients for <=x / >=x , such as:
For starters,...
- 11
1
vote
1
answer
47
views
Why does the Gelman plot of a JAGS model start at 1000?
I am looking at the diagnostics of a Bayesian model using rjags in R. In particular, I am considering its Gelman-Rubin-Brooks plot. Independent of the number of ...
- 213
2
votes
1
answer
22
views
How to present the relation between two KPIs
The case is for a logistics company. We are trying to show our users their current emissions and how much emissions they can save/avoid/reduce by choosing more sustainable routing options. On our ...
- 23
3
votes
1
answer
126
views
Forest plot to show results in a observational restrospective cohort study
I have to present my study as a poster and, in order to make my results more visual, I thought it was a good idea to report them as a forest plot. However, it is ok to use a forest plot to report the ...
- 43
0
votes
0
answers
44
views
Plot linear mixed-effects model results
Background: I am looking at how clinical factors affect disease progression in a longitudinal dataset with a mixed effects linear model where A is the response variable (here, a measure of disease) ...
1
vote
1
answer
79
views
What is the best way to visualize relationship between three variables?
I have a data like this:
Company
Providers
Paths
A
1
14
B
2
15
C
4
60
D
2
13
The greater the number of providers, the greater the paths. What might be the best way(graphical plots) to present ...
- 267
2
votes
1
answer
61
views
Why does factor appear significant in 2-way ANOVA but not by inspection (mean +/- sd or error plot)?
I am puzzled about the result of a 2-way ANOVA analysis. The factors are categorical and non-random and the sum of squares used is constrained type III (the choice of categorical or SS type does not ...
- 165
0
votes
0
answers
47
views
Interpreting the Y-axis of a visreg visualizaion of a binominal logistic regression model
This is a long post, apologies for the length. In sum, I just want to know what the Y-axis represents in the below plots.
Here's the background:
I have a binomial logistic regression model in which ...
- 53
10
votes
4
answers
3k
views
What kind of chart is this and how to read it?
I came across this chart that is both weird and intriguing. It is about some literary works produced in the regions mentioned. The x axis is the time and y axis the percentage.
The preceding para has ...
- 203
0
votes
0
answers
13
views
Given variable A and B containing data of lemma sentiments, what is the correct term for the variable containing average of var A and var B?
I have a data visualization, showing the sentiment of two lemmas "гей" (var a) and "трансгендер" (var b) in a news corpus throughout the year.
Here is the dataframe sample of my ...
- 13
6
votes
1
answer
382
views
Visualization of a mixed effect logistic regression model?
Can you suggest me which graphs I should do to visualize a mixed effects logistic regression model with three fixed predictors (all categorical) and two random intercepts?
- 175
0
votes
0
answers
32
views
Representing duration on a map
I have a geographical map of a region, with a few locations of interest on it. For these locations (a dozen - edit: I just counted them, they are actually 25! Sorry for the underestimation), I want to ...
- 1
3
votes
1
answer
45
views
How should I visualise uncertainty in a histogram from survey sampling?
I have a numeric variable $\{x_i\}$, which corresponding weights $\{w_i\}$, where the weights are survey weights from a corresponding complex survey design.
I want to visualise a weighted histogram of ...
- 2,616
4
votes
0
answers
61
views
experimental evidence for differences in perception on vertical vs. horizontal scales
I am searching for experimental studies, by Cleveland or anyone else, that test differences in the accuracy of quantitative judgements (or related aspects of visual perception) based on whether data ...
- 45.2k
4
votes
1
answer
100
views
Alternatives to population pyramids
In a comment thread relative to another question, Nick Cox says:
Population pyramids are over-rated. Subtle shifts in the ratio females
to males, or its reciprocal, are important and common and ...
- 347