Questions tagged [data-visualization]

Constructing 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.)

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Why would quartile plotted against percentile not be a straight line?

In the famous Dunning-Kruger paper perceived and actual scores are plotted, with quartile on the x axis and percentile on the y axis. The message is the perceived scores, and the actual scores are ...
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Practical correlation metric for a large number of vectors

I am dealing with a timeseries consisting of input flow sampled every 5 minutes over 441 days. My aim is to find any possible correlation from data coming from: The same day of the week The same ...
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Appropriate visualizations for exploring count data

I am preparing to do a regression model (probably Poisson) where the goal variable is count data (number of times a patient received a blood transfusion). I will have to do variable selection out of ...
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What graph should I use in SPSS [closed]

I have been measuring CH4 concentration in different depths for 3 lakes and I now want to present it in a graph, lake for lake. The reason why I want to present it in a graph is to be able to ...
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What is the best way to visualise a panel regression?

Simple scatter plots or a correlation matrix can be misleading since they aggregate all years together. What would be te best way to visualise relationships between variables taking time into account? ...
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I have a graph which appears to be random but there seems to be a pattern hidden in it. How do I analyze it?

The below graph seems to be random but I think the peaks seem to repeat after a certain period. Are there any statistical tools I can use to analyze this? Edit: I am adding the plot of its ...
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Error while sending the email in marketo [closed]

Hope you are doing well! In Marketo, I change my setting a month before, and after that, I am getting these errors while sending emails like 550 5.4.1 Recipient address rejected: Access denied ,550 5....
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Statistical analysis (comparison) of time course experiments

I have data sets that represent multiple measurements over time. The data sets come from biological experiments in which we measure something in N individual cells, with around 250 measurements over a ...
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How to find difference in means at particular points in a by-factor GAMM?

This is a bit long but I wanted to give enough photos and code to explain what I'm doing and the issues I'm having. The main question is in the last paragraph. I'm examining differences in male and ...
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What is the best way to represent Spearman’s correlation graphically?

For my thesis research I have to do Spearman’s correlation tests on a set of ordinal variables. I would like to represent the correlations graphically to include them in the report and give a clearer ...
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plotting single plot to figure with gratia package for model visualisation [closed]

I am using Gavin Simpson's gratia package to plot my models (GAMs) as follows: draw(mod, scales = 'free', rug = NULL) The different plots get written to a single ...
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Describing / fitting a highly skewed distribution

I've got a data set of 84,529 entries, each entry referring to the number of times a particular entry is cited in a database. This set is extremely skewed, ranging from entries with 0 citations to one ...
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Any reason for choosing t-SNE over UMAP when visualizing?

According to the UMAP paper: Our algorithm is competitive with t-SNE for visualization quality and arguably preserves more of the global structure with superior run time performance. paper It seems ...
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Copula Application

Among other things, I am working on dependency structures for the reliability analysis of river embankments and use Copulas for this purpose. I have 3 questions about this: Strucure I am not yet ...
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How do I make a user analytics model using logged data

I have a productivity app that I'm currently working on which requires a user analytics panel that logs how much time they've studied, including how much time spent on app navigation, how much time ...
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Histogram vs Bar Graph [closed]

I have data for number of patients used to collect the data in a hospital for each day. I want to display them as a graphical representation of number of patients used to collect the data for each ...
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Data analytics basics for a organization

I have no knowledge on data analytics, just trying to start. I also have no idea which tools to use, so here is my question, If I have to build a data analytics for an organization which shows trends ...
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R Find the intersection of two lines for each group

Given the following data.frame: ...
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What is the meaning of this residuals vs fitted plot? (multiple linear regression)

I am running a multiple linear regression model in RStudio at the moment and wanted to check my assumptions. As seen by the plot, my red line does not appear to be flat and instead curved in places. I ...
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Finding line equation that fits decision boundary

Given: A train and testing dataset with two features $x_1$ and $x_2$ Two binary classes for classification ($0$ or $1$) Training and prediction with the Naive Bayes algorithm for Gaussian ...
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Is the variance of the distribution of $A/B$ directly related to the correlation of $A$ and $B$

I have a large data set in which I am trying to produce an effective plot to show the correlation between fields $A$ and $B$ for multiple different groupings, where $A, B \gt 0$. A correlation matrix/...
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Interpreting the results of an interaction plot

I have data on 3 species of fish that we fed 2 different types of food and we measure the eggs they lay (number of eggs are a coefficient, but that's not important for this question). The fish species ...
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homoscedasticity violated or not?

I was wondering if the homoscedasticity in these two figures has been violated or not? Best regards, Elise
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Probability curve and significance in ordinal models

I ran a generalized ordinal model with 4 classes: (150:302='1'; 65:150 = '2'; 30:65 ='3';0:30 = '4'"). ...
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tSNE on OCTMNIST dataset (part of MedMNIST) not working

I have been trying to generate the tSNE plot for the OCTMNIST dataset which is a part of MedMNIST v2(https://medmnist.com/). The code that I have been using is- ...
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1 vote
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When is it favorable to not visualize univariate data using empirical CDFs?

A straightforward question: when is it "favorable" to interpret visualizations using, say, boxplots, histograms/density estimates, versus empirical cumulative density functions (ECDFs)? I've ...
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How can a three-way interaction between three categorical DVs and a categorical IV be visualised?

I have a dataset which contains a two-level categorical dependent variable and three two-level categorical independent variables. A logistic regression showed a significant three-way interaction ...
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What do ggplot's stat_summary errorbars mean?

Say we have the following data: ...
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Graph/Network Clustering Models that Use Covariate Information

I have been reading about Clustering Models on Graph/Network data. For example, there seems to be a popular Clustering Model for Graph/Network data called Louvain Clustering (https://en.wikipedia.org/...
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Change y-axis value in R GAM plot from smoothed to actual response variable

I know similar questions have been asked before, but I've looked through them all and I'm still confused, in part because the other examples seem to be more complicated, so thought I'd throw mine up. ...
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Interpreting validation loss and accuracy for various learning rates

I am having a hard time comparing the effect of different learning rates on validation loss and accuracy. Would I be right in assuming that a Learning rate of 0.0001 was the most successful as the ...
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Visualization for positive/negative contributions to sum over time

Looking for a type of visualization well-suited to a specific type of data. I have a quantity that is a sum of components. Those components can be positive or negative, and the end sum can be positive ...
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Urban Site observation data analysis suggestion

I have conducted site observation at four different locations for a period of 20 mins. (Total of 30 observations for each site). During the site observation, the pedestrian counts, age group and ...
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1 answer
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How do you present results of a proprtional hazards model when the outcome is a good thing?

We have run several Cox proportional hazards models. One of the outcomes is a beneficial thing (discharge from hospital), while the others are all negative outcomes (these are not competing outcomes ...
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Which statistical tests can I conduct to analyse the trend of series data?

I have a dataset that measures students' time spent working on a set of mathematics questions. My dataframe looks a little something like this: Participant ID Question 1 Question 2 Question 3 1107 ...
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How to visualize common pattern of state changes over time?

I have a process which checks workers in a service once a day. When it checks them, they will have one of a few states: Unknown - Either brand new or the worker is offline Inprogress - When checked, ...
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What is the name for this time series rank plot?

from:https://2020.stateofjs.com/en-US/technologies/front-end-frameworks/ What is the name of this type of chart? How can I create the same chart in python ?
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create probability function of my dataset

I want to create a probability density function of my dataset. I follow the advice of a specialist to visualize my dataset...Which is distribution fits my dataset visualization? Thank you!!! Your ...
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1 answer
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How choose the number of classes of a series?

I am newbie in DS. I'm doing a choropleth map with votes of a senator in several cities. And I have two questions: 1 - How choose the correct number of classes to part the data? At the time im using ...
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Dealing with class imbalance and data complexity issues

I am doing a classification task for a 5-class imbalanced dataset. Class distribution shows 2-majority & 2-minority clasess, as far: ...
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Graphic representation of averages

I have a series of averages. One of these however turns out to take too high a value due to a N. low equal to 1. Let me explain better by means of an example: I have to calculate the averages of the ...
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Mathematical rule for choosing X & Y for scatterplot maximising spread of points [closed]

Is there any method for choosing a combination of X and Y dimensions for a scatterplot, from a larger dataset that has been standardized to be centered at zero and have unit variance, that will ...
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Best way to plot a heavy tailed distribution?

Log-log seems more conventional to plot a probability distribution to look for evidence of a heavy tail. Why is this the case? For data with a heavier tail than an exponential distribution, wouldn't ...
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1 vote
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How to adjust for the baseline difference between groups for a histogram

I have data from an experiment that tested responses to stimuli in females and males. I measured baseline for both groups prior to presenting the stimuli. The baseline for males is higher than for ...
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Representing MAE and standard deviation for multiple models over multiple bins in python?

I have 21 regression models. I am plotting MAE and Standard deviation of models using a errorbar plot in python. However, if I bin the data (say 10 bins), and for each bin now I can calculate MAE, ...
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Plot the effect of one continuous variable on the change of another continuous variable through time

I have the change of empathy (continuous variable) from time 0 to time 1 and I want to see how another continuous variable (immersion) is affecting the change of empathy. I am using R and ggplot.
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1 vote
1 answer
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Class separability and Overlap

I have a dataset for five different classes with 40 features. This dataset is somehow imbalanced with 2 majority & 2 monirity classes, the other somehow average. This is a classification task and ...
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Best interpolation for strictly decreasing data

So I was using an interpolation for this curve and made the mistake of using Lagrange's polynomial interpolation: I wanted an interpolation that acts a that can vary depending on the data points, and ...
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Visualizing multivariate multiple regression of continuous data in R

I have created a multivariate multiple regression model with 3 dependent and 3 independent variables in R, and would like to generate meaningful visualizations. All variables are continuous. When ...
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An appropriate alternative for box plots of grouped data with a median of 1

Having visualised my data using a box plot, it's apparent that I should find a better visual representation of my data, but I'm left wondering what it should be. I am trying to visualise the number of ...
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