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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2
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0answers
26 views

What's wrong with this visualization of eigenvalues/vectors/PCA?

I have a dataset of 17 people, ranking 77 statements. I want to extract principal components on a rotated correlation matrix of correlations between people (as variables) across statements (as ...
1
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0answers
10 views

Make 2D color histogram with uniform distribution (Likert scale)

UPDATE: I've been told that I cannot specifically ask for help in regards to the programming (MatLab and PR Tools), but instead should seek help for general techniques. So that's what I'm doing. Long ...
0
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1answer
40 views

Comparing datasets from 2 biological replicates

I have two datasets containing experiment data based on two biological replicates. I wonder what the best statistical methods are to find out and test how similar these two datasets are, and also how ...
0
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0answers
26 views

How to plot the cumulative distribution function of std normal dist/smooth curve, step functions [on hold]

Look for “pnorm” and “pbinom” in help. Use these commands to plot the cumulative distribution function of the standard normal distribution (of parameters 0,1) and of binomial distributions of ...
0
votes
0answers
12 views

Plot specific function in informative way [on hold]

I have been stuck for hours on the problem of how to present the behaviour of the following function. $$ f(x)=\frac{2}{x^2~\alpha_-}\left[ x-\sqrt{(x-1)(x-\frac{\alpha_+}{\alpha_-})} \right], $$ where ...
3
votes
1answer
38 views

Predict user behaviour with constantly changing input variables

How to work on building an engine for a website wherein we want to score/recommend stuff based on her different activities, like the music she rated or the article she read, or whether email ...
1
vote
0answers
24 views

What is the best way to present rank survey data?

I have a survey data where I've asked a local community to rank 6 different issues they face on a scale of 1 to 6. For example, ...
0
votes
0answers
51 views

ROC curve cut off and weights

I have a dependent variable distinguishing between patients that should go to treatment A or treatment B. I want to develop a questionnaire containing binary variables that should decide if the ...
1
vote
0answers
41 views

Plotting Survival Rates For Different Cohorts

I am using Stata 13 to analyze a panel with firm level data. I am estimating a dynamic probit model via the means of xtprobit. During my research I came across Peters (2009) and a very cool graph (see ...
4
votes
1answer
44 views

What is the best way to visualize difference-in-differences (multi-period) regression?

What's the best way to visualize difference-in-differences for both binary and continuous treatment? Do I regress the outcome variable on the set of controls but exclude the treatment variable and ...
0
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0answers
20 views

What is the best way to group countries for graphing world crime statistics?

I am currently working on a project where I have chosen to analyse the frequency of terrorist attacks and their impacts using the global terrorism database (dataset available here: ...
3
votes
2answers
38 views

Appropriate visualization for the Wilcoxon signed rank test

I have question regarding the Wilcoxon test and if the results can be represented visually. I had 10 participants in my experiment where by I asked participants to read sentences and then they ...
0
votes
0answers
19 views

What's the best (Google chart) visualisation for displaying sparse timeline data across thousands of “columns”

I am trying to visualise a sparse dataset but am finding it hard to fit it into the standard categories of charts. I'm a developer building with Google Charts and I really want to stick with that ...
0
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0answers
20 views

Visualization Question [duplicate]

Simple question, has anybody ever seen a similar visualization to the one below? If so what is the name of such a graph and what software could be used to create it?
1
vote
0answers
17 views

Plotting a 3D gaussian

I was wondering what is a good way to visualize a 3D Gaussian distributions. Suppose I have a mu(1x3) rowvector and a covar(3x3) matrix. I know I can use the basic visual formula and get the density ...
0
votes
0answers
14 views

How to plot multiple variables of a data.table in R? [migrated]

I have a time series that has a DateTime variable and 4 more variables, which are measured over time. I'm trying to create a function in R which gets the data set (as a data.table) and creates 4 ...
0
votes
1answer
33 views

What measures the y-axis in stat_smooth, ggplot2 in R? [closed]

I am fairly new with logistic regression. I have a binary response. And did this plot. The binary response is: Y = 0: The student fails Y = 1: The student succeed ...
0
votes
0answers
17 views

Visualizing and analyzing a time series of grid points

I have a dataset which contains numeric info about a series of grid points in a room for the entire year. The dataset looks something like this The first three digits are month,day,hour. The others ...
4
votes
2answers
311 views

How can the “anti-correlation” between these two curves be shown?

I'm looking at data defined on a given feature with respect to two measures. Whilst both measures are defined on the same domain, both measures are defined on different ranges, so, with a view to ...
0
votes
0answers
26 views

Which is the correct graph visualization for multi-choice questions?

I'm working on a questionnaire with some multi choice questions. E.g. Which continents are you planning to visit? Africa Asia etc. The next will be to refactor the current analytics that are a ...
1
vote
1answer
32 views

R: visualizing kmodes clusters

I am working on cluster analysis of a completely categorical data set using package klaR and function kmodes. Sample of the ...
1
vote
2answers
46 views

F-distribution of data in Matlab

I have F = 1x44100 vector in Matlab. Based on how this was calculated, we have predicted that this fits the F-distribution with 16 degrees of freedom for both numerator and denominator. I am really ...
3
votes
1answer
61 views

How to interpret notched box plots

While doing some EDA I decided to use a box plot to illustrate the difference between two levels of a factor. The way ggplot rendered the box plot was satisfactory, but slightly simplistic (first ...
1
vote
1answer
38 views

Difference between PCA and spectral clustering for a small sample set of Boolean features

I have a dataset of 50 samples. Each sample is composed of 11 (possibly correlated) Boolean features. I would like to some how visualize these samples on a 2D plot and examine if there are ...
4
votes
1answer
31 views

Trend Visualization of N time series

I have about 500 time series with different trends, and each time series represents a given nb of transactions. (Volumes follow a long tail distribution). I would like to plot a summary graph on ...
0
votes
0answers
41 views

Heatmap small p-values

I'm experiencing some difficulties trying to manage too small p-values derived from a Fisher test. In particular I have p-values like: 2.220000e-121, 1.260000e-26, 1.260000e-334, and so on. The ...
0
votes
0answers
16 views

Create a 'biplot' (using factor analysis?) showing effect of each input variable on a two-output solution

I have a couple hundred datapoints, each of which has 6 input variables which run through a complex simulation to give two output variables. Because I have two output variables, I can create a nice ...
2
votes
1answer
43 views

How to properly plot paired data when you have more than two groups

I have a question which seems to be very elemental but I have found lot of disagreement about it. I have a situation where we took several measurements of the same individuals. I was suggested to ...
1
vote
1answer
35 views

Standard practice for small values in a logarithmic visualization

I'm plotting data using circles. I am assigning the radius of the circles to be the value of the data each circle represents. Since the data values get too large to successfully plot in this way I ...
2
votes
1answer
51 views

Interpreting the spread-level plot from R

I created a spreadlevel plot on my simple linear regression model in R. Here is my code, spreadLevelPlot(ols_reg) where ...
5
votes
1answer
81 views

How to add a third variable to a bar plot?

I'm trying to find the best way to show the following data: ...
0
votes
1answer
32 views

Comparing interest rate and yearly stock return

I would like to compare the interest rate with the yearly return of a stock A and plot the 2 lines into 1 graph. The interest rate, which is also a yearly return, is on any given date determined by ...
2
votes
1answer
23 views

Testing data for regular oscillations

This is a little hard to explain, but I would like to test data for periodic oscillations, but not necessarily oscillations of the same amplitude. for example (crudely!): So basically I want to ...
0
votes
0answers
8 views

Drawing a moving average-style line representing the amount of quota left (R graph drawing) [migrated]

I'm drawing a graph of the usage of my ISP's monthly download quota, categorized by the host that uses it. I've got that part working quite well. What I'm struggling to do is to include a line which ...
-1
votes
1answer
31 views

Data mining or data visualization?

My basic doubt is what is difference between Data mining and Data visualization? does they have different algorithms? I have a machine data stored in database. I have to develop an app which will ...
3
votes
0answers
23 views

Testing discrete data for periodicity

I have some data which looks roughly periodic - is there a nice way to measure this? This is an example I'm working on and I'd like a metric that I will be able to just threshold to give a decision ...
13
votes
8answers
493 views

How can you visualize the relationship between 3 categorical variables?

I have a dataset with three categorical variables and I want to visualize the relationship between all three in one graph. Any ideas? Currently I am using the following three graphs: Each graph is ...
3
votes
1answer
41 views

Many to many flow diagram or an alluvial plot?

Suppose a person can be defined with 3 variables (each in the range 0-1000) which then lead to an output label Y. I have 20-40 labels. What is a good visualization to show the flow of people to Y ...
1
vote
1answer
38 views

How to interpret height of density plot

How should I interpret the height of density plots: For example in the above plot, peak is at about 0.07 at x=18. Can I infer that about 7% of values are around 18? Can I be more specific than ...
3
votes
1answer
54 views

How to interpret the residual colors on a mosaic plot?

This is a mosaic plot of contingency table dataset HairEyeColor described here. How do I interpret the colors representing residuals? What is the difference ...
4
votes
2answers
64 views

Which is the best visualization for contingency tables?

Which is best plot, from statistical standpoint, to show a contingency table, which is typically being analyzed by chi-square test? Is it a dodged barplot, stacked barplot, heatmap, contour plot, ...
4
votes
0answers
49 views

Interpretation of biplot in PCA

Blue points all appear in the lower right-hand quadrant in the plane formed by the first two principal components. Is it a good interpretation of the biplot (right panel) to say that blue points ...
1
vote
0answers
16 views

Best plot to accompany unpaired 2-group test

If one plot is to be recommended for an article, from statistical point of view, which plot is best to convey information in cases of unpaired 2-group comparisons. Is it boxplot, violin plot, ...
2
votes
0answers
22 views

Better Visualization for Correlation Plots

I'm currently working on an analysis of correlated variables involving +20 variables. I can create correlation (triangle) plots and that is quite helpful but I am wondering what other kinds of data ...
0
votes
0answers
16 views

Growth mixture modeling with latent variables in R with lcmm

I am trying to replicate the analysis that was used to make this figure: I have measured the depression levels (a quantitative variable) in my subjects at the following time points (in months): ...
0
votes
0answers
21 views

How can we observe interaction?

Are there graphical methods to determine whether there are some sort of interaction between two variables towards the response variable? Thanks!
0
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0answers
37 views

How does one graph a 3 way interaction on excel? Also. how do you explain a 3 way interaction?

So my 3- way is between Prime x ethnicity x gender, not sure how to graph it and how to verbalize it. Any ideas are greatly appreciated. Thank you.
3
votes
2answers
84 views

How to represent kWh usage by year against average temperature

If there is a better StackExchange to post this question, feel free to direct me elsewhere. Just for fun, I want to chart my monthly household power consumption year-over-year. However, I wish to ...
1
vote
0answers
21 views

How do I plot an abline() when I don't have any data points (in R) [migrated]

I have to plot a few different simple linear models on a chart, the main point being to comment on them. I have no data for the models. I can't get R to create a plot with appropriate axes, i.e. I ...
1
vote
1answer
25 views

Smoothing Kernel Preventing Simulation of Semi-Circle Law of Random Matrices

In trying to understand the properties of random matrices in the book "Plane Answers to Complex Questions" by R.Christensen, I came across the Semi-Circle Law, and tried to reproduce it with ...