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.)

Filter by
Sorted by
Tagged with
1
vote
0answers
680 views
26
votes
3answers
12k views

Visualizing Likert Item Response Data

What are good ways to visualize set of Likert responses? For example, a set of items inquiring about the importance of X to one's decisions about A, B, C, D, E, F & G? Is there something better ...
16
votes
3answers
87k views

How to put values over bars in barplot in R [closed]

This question is related to my previous question. I would like to put values over bars in barplot. I am beginner in plotting in R.
9
votes
3answers
88k views

How to create a barplot diagram where bars are side-by-side in R

I want to create a bardiagram for these data in R (read from a CVS file): Experiment_Name MetricA MetricB Just_X 2 10 Just_X_and_Y 3 20 to have the following ...
9
votes
10answers
9k views

How do you draw structural equation/MPLUS models?

I am looking for a software tool (preferably open source) to draw structural equation/mixture models efficiently and prettily. After looking into xfig and graphviz I now stick to the general vector ...
15
votes
2answers
23k views

Show average instead of median in boxplot [closed]

When plotting a boxplot with python matplotblib, the lines halfway the plot is the median of the distribution. Is there a possibility to instead have the line at the average. Or to plot it next to it ...
7
votes
1answer
351 views

Recommendations for visualization type when data has an extremely wide variance

I'm working on a web app, and I'm creating some data viz tools for it. For one particular series, I've got an extremely wide variance in data values (0 to millions). We're using a column chart to view ...
3
votes
1answer
1k views

R package ltm: How to manipulate title on item response category characteristic curve plot

I have conducted an IRT analysis using package ltm in R 2.10. fit1 <- grm(data) When producing plots of item response characteristic curves (ICCs), ...
4
votes
1answer
120 views

Rating how closely one graph models another

I'm using a genetic algorithm to generate a string that produces certain results I map into a line/bar graph. I'm trying to rate how closely the results produced by the genetic string compares to a ...
8
votes
4answers
968 views

Visualization of connections between groups

I have around ten groups (of companies). Each group is connected with each other group. The data I have is representing the strength of the connection. Imagine it's the number of times someone from ...
4
votes
2answers
158 views

How to create a vector with equivalent spacing between its consecutive elements in R?

I was wondering how to create a vector with equivalent spacing between its consecutive elements in R? In Matlab, I can do [start:step:end]. Also if I want to plot a function with analytical form, do ...
7
votes
2answers
222 views

Visualizing activity frequency

Hello data analyst community. I have the following problem: Given a set of n units and a timeline in days. A unit may be active at a certain day to a certain degree (in range from 0.0 to 1.0). A ...
15
votes
5answers
3k views

A good way to show lots of data graphically

I'm working on a project that involves 14 variables and 345,000 observations for housing data (things like year built, square footage, price sold, county of residence, etc). I'm concerned with trying ...
2
votes
2answers
3k views

How can I display empirical pdf of my 100x1 vector data in Matlab? [closed]

I have a data which is 100x1 vector. How can I display its empirical pdf in Matlab? Also, if I want to compare the pdf of three vectors on the same graph, then how to do that? Right now I am using ...
5
votes
2answers
463 views

Where can I find a good resources for making publication quality line plots

I have to incorporate a number of line plots in a Latex document and I want to get a very high quality. Are there any website that show some templates or default plots styles that I can use. Myself I ...
3
votes
2answers
5k views

How to calculate cex.axis automatically so to fit to the maximal width possible (in R)? [closed]

Let's say we created a plot, with labels: plot(1, xlab = "text", ylab = "text times three") # text too small In this plot there is still a lot of free region to ...
19
votes
5answers
10k views

What is this type of circular-link visualization called?

Does this type of chart have a name? More importantly, is there any visualization library I can use to produce it? http://www.nytimes.com/interactive/2007/12/15/us/politics/DEBATE.html
10
votes
4answers
4k views

How to look for valleys in a graph?

I'm examining some genomic coverage data which is basically a long list (a few million values) of integers, each saying how well (or "deep") this position in the genome is covered. I would like to ...
5
votes
1answer
2k views

Normalizing or detrending groups of samples

How do I detrend or normalize multiple series of data so that I can inter-compare between the series? Specifics below may not be appropriate for this forum. Please let me know and I can remove or re-...
45
votes
8answers
24k views

How to do community detection in a weighted social network/graph?

I'm wondering if someone could suggest what are good starting points when it comes to performing community detection/graph partitioning/clustering on a graph that has weighted, undirected edges. The ...
3
votes
1answer
2k views

Is Lorenz curve the same as QQ-plot?

Are Lorenz curves and QQ-plots the same? If not, where are the differences? I read about both of them and they appear to be two terms for the same type of plot / statistical technique to compare ...
1
vote
1answer
186 views

Best value to store ratio data and compare it to time period average

I'm looking for a simple way to store ratios. For a time component, I must store the average ratio between two behavior. For example the number of people that turn left compared to the number of ...
13
votes
3answers
9k views

An easy explanation for the parallel coordinates plot

I have read and seen a lot of Parallel coordinates plots. Can someone answer the following set of questions: What are parallel coordinates plots (PCP) in simple words, so that a layman can understand?...
5
votes
1answer
172 views

R plots to a connection?

Is there a way to have R plot to an in-memory object or connection, rather than a named file? I would like to have a plotting server create many graphs without ever going to a file. The Cairo ...
2
votes
2answers
216 views

Graphing low-end prices of goods in a market over time

I have a large sample of market data - that is the prices and amount of goods being sold by vendors at specific, but inconsistent, points in time. Assuming I am a buyer and the quality of the goods ...
14
votes
1answer
18k views

How to make age pyramid like plot in R?

Age pyramid looks like this: I would like to make something similar, namely a 2 barplots (not histograms) with same categories, rotated vertically and extending to both sides as in pyramid. Is it a ...
2
votes
2answers
334 views

Date/Time data on the y-axis

I have some data values of type date/time (the last date that a resource was accessed) and I wish to chart this data on the y-axis against the different categories of resource on the x-axis. What ...
6
votes
3answers
336 views

Data visualisation- summarise 190 means and response rates

I have a very large data set which I would like to summarise in as small a space as possible, preferably one side of A4. The data are from a customer satisfaction survey and are Likert-type scales, 5 ...
6
votes
3answers
669 views

Visualization of a multivariate function

This is somewhat vague, but suppose you have a black box function $f(x_1,x_2,\ldots,x_k)$, for which you have code, and you are interested in the behaviour of $f$ when the $x_i$ are i.i.d. standard ...
8
votes
4answers
2k views

Kaplan-Meier, survival analysis and plots in R

What is the best package to to do some survival analysis and plots in R? I have tried some tutorials but I couldn't find a definite answer. TIA
19
votes
10answers
2k views

Resources for learning to create data visualizations?

I'm interested in learning how to create the type of visualizations you see at http://flowingdata.com and informationisbeautiful. EDIT: Meaning, visualizations that are interesting in of themselves -- ...
7
votes
5answers
5k views

Free treemapping software

Is there any free desktop software for treemapping? Every one I've found appears to have a commercial license. Many Eyes is free and has treemapping features but what I'm really looking for is ...
11
votes
2answers
9k views

Quickly evaluate (visually) correlations between ordered categorical data in R?

I'm looking for correlations between the answers to different questions in a survey ("umm, let's see if answers to question 11 correlate with those of question 78"). All answers are categorical (most ...
14
votes
4answers
5k views

Follow up: In a mixed within-between ANOVA plot estimated SEs or actual SEs?

I am currently finishing a paper and stumbled upon this question from yesterday which led me to pose the same question to myself. Is it better to provide my graph with the actual standard error from ...
32
votes
2answers
83k views

Interpretation of biplots in principal components analysis

I came across this nice tutorial: A Handbook of Statistical Analyses Using R. Chapter 13. Principal Component Analysis: The Olympic Heptathlon on how to do PCA in R language. I don't understand the ...
9
votes
2answers
19k views

How do I vertically stack two graphs with the same x scale, but a different y scale in R?

Greetings, Currently I'm doing the following in R: ...
28
votes
6answers
9k views

What are alternatives to broken axes?

Users are often tempted to break axis values to present data of different orders of magnitude on the same graph (see here). While this may be convenient it's not always the preferred way of displaying ...
2
votes
2answers
3k views

Visualizing standard deviation on a Cartesian plot

I came across an example where standard deviation was being plotted on a Cartesian plot (standard 2D with X and Y axes.) This seems like a valid thing to do but in this case the example only had a ...
5
votes
4answers
2k views

How to draw a probable outcome from a distribution?

I have collected positional data. To visualize the data, I'd like to draw a 'typical' outcome of an experiment. The data comes from a few hundred experiments, where I identify a variable number of ...
13
votes
5answers
395 views

Cognitive processing/interpretation of data visualizations techniques

Does anyone know of research which investigates the effectiveness (understandability?) of different visualization techniques? For example, how quickly do people understand one form of visualization ...
14
votes
9answers
11k views

Visualization software for clustering

I want to cluster ~22000 points. Many clustering algorithms work better with higher quality initial guesses. What tools exist that can give me a good idea of the rough shape of the data? I do want to ...
5
votes
3answers
1k views

Libraries for forest and funnel plots

Can anyone recommend me an open source graphic library to create forest and funnel plots? I was aiming at using it on a Java desktop application.
7
votes
3answers
2k views

Visualizing two scalar variables over time

What would be the best way to display changes in two scalar variables (x,y) over time (z), in one visualization? One idea that I had was to plot x and y both on the vertical axis, with z as the ...
9
votes
2answers
3k views

Visualizing multiple “histograms” (bar-charts)

I am having difficulties to select the right way to visualize data. Let's say we have bookstores that sells books, and every book has at least one category. For a bookstore, if we count all the ...
9
votes
5answers
842 views

How to interpret a control chart containing a majority of zero values?

I am using a control chart to try to work on some infection data, and will raise an alert if the infection is considered "out of control". Problems arrive when I come to a set of data where most of ...
2
votes
2answers
178 views

Analysis of sells (what to buy)

I have a list of sold items by size. Shoes in this case ...
15
votes
8answers
3k views

Alternative graphics to “handle bar” plots

In my area of research, a popular way of displaying data is to use a combination of a bar chart with "handle-bars". For example, The "handle-bars" alternate between standard errors and standard ...
4
votes
1answer
1k views

Equation to calculate a smooth line given an irregular time series?

I'm trying to visualize a set of data that represents human body mass over time, taken from (usually) daily weighings. Because body mass tends to fluctuate +/- 3 pounds based on hydration I would ...
12
votes
6answers
32k views

How do I reduce the number of data points in a series?

I haven't studied statistics for over 10 years (and then just a basic course), so maybe my question is a bit hard to understand. Anyway, what I want to do is reduce the number of data points in a ...
14
votes
4answers
1k views

What graphical techniques are used in Structural Equation Modeling?

I'm curious if there are graphical techniques particular, or more applicable, to structural equation modeling. I guess this could fall into categories for exploratory tools for covariance analysis or ...