Presenting results in graphical form; for example, histogram, scatterplot, or boxplot.
3
votes
2answers
300 views
Visualizing high dimensional binary data
What is a good way to visualize high dimensional (say n=10) binary data? I remember reading something about that a few years ago.
Say for instance, you want to plot / cluster pizzas based on their ...
6
votes
4answers
2k views
How to determine best cutoff point and it`s confidence interval using ROC curve in R?
I have the data of a test that could be used to distinguish normal and tumor cells. According to ROC curve it looks good for this purpose (area under curve is 0.9):
My questions are:
How to ...
3
votes
2answers
185 views
When is it incorrect to draw stacked area charts?
Stacked area charts work great when charting raw values, averages, counts, and percentage of total. The sum of the values across the different groups will add up to that of the entire set.
But what ...
5
votes
1answer
381 views
How to visualize both total counts of categories and proportions of subcategories in a plot?
Suppose I have samples drawn from categories A, B, C. Within those categories, I have subcategories d,e,f which are found in all 3 categories. I want to visualize how many samples I have form ...
3
votes
1answer
238 views
How to plot the contribution of each regression coefficient in a model, with R?
I've fit a model with lm(), and I now want to analyze it to see where it's overfit, etc... I'm imagining a plot that has the index of each observation on the x-axis, and the corresponding responses ...
2
votes
3answers
191 views
How to visualise a 3D data-set for someone over the Internet?
I was just about to ask a question concerning a certain 3D data-set (each point in space has a value associated), but couldn't figure out how to visualize it for you. I can understand it myself by ...
3
votes
2answers
229 views
Panel-data exploratory data analysis
I have a dataset for around 40k firms over fiscal years 1950-2011 with about 430k firm-years. If I'm not mistaken I have panel-data. In addition, the firms are nested within 9 industries.
I created a ...
4
votes
1answer
138 views
Visualizing a spline basis
Textbooks typically have nice example plots of of the basis for uniform splines when they're explaining the topic. Something like a row of little triangles for a linear spline, or a row of little ...
1
vote
2answers
169 views
Calculating standard error for funnel plots
I'm a programmer, with a decent but not-expert knowledge of stats, and I'm working through these instructions for how to create funnel plots.
I know that there are better ready-made tools (e.g. R) ...
1
vote
0answers
80 views
Appropriate use of difference adjusted CIs in error bars for mixed ANOVA's time * group interaction
I have performed a mixed design ANOVA with time (pre-post) and group (treatment vs control) as variables. I'm wondering if it's sensible to use between subjects difference adjusted CIs (from Baguley, ...
3
votes
1answer
421 views
Plotting overlaid ROC curves
I'm trying to make overlaid ROC curves to represent successive improvements in model performance when particular predictors are added one at a time to the model. I want one ROC curve for each of about ...
2
votes
1answer
149 views
How to label a constant y-axis in a grid of plots?
I have a grid of plots (see example below) with different x axes but all the same y-axis. What is the best way to label the y-axis without being redundant? The information is in the legend, but this ...
0
votes
0answers
430 views
Computing and plotting a correlogram
I have a sample data for a spatial grid of size 20x20. I need to plot the correlogram of this grid of data to see how much they are correlated. Currently I have 400 data points for the 20x20 grid ...
1
vote
1answer
176 views
How to create a histogram smart
I need to make a histogram of employees in firms across the country.
My goal is to examine the extreme observations and there is of course a lot in the beginning and very few in the end so I can't ...
4
votes
2answers
538 views
Wondering what this bean plot analysis chart means
How does one interpret and generate bean plot charts. Here is one example taken from Walkes et al. 2010. What kind of data is it most useful for?
14
votes
4answers
893 views
What are good data visualization techniques to compare distributions?
I am writing my PhD thesis and I've realized that I rely excessively in box plots in order to compare distributions. Which other alternatives do you like for achieving this task?
I'd also like to ask ...
0
votes
1answer
330 views
Plotting Options in R: Setting Axis Limits
I am plotting a density estimate for misclassification rate of some classifier using the standard plot and lines functions. Even ...
1
vote
1answer
1k views
Plotting a gaussian mixture with pdf values >> 1 in MATLAB
From a given dataset X, I learn a 7-component gaussian mixture model using matlab's gmdistribution.fit:
...
1
vote
1answer
152 views
How to utilize the result of aov function?
Based on the responses from the question How to draw a side-by-side plot mentioned in "Graphical Display as an Aid to Analysis", I am considering implementing the function myself. The ...
0
votes
1answer
319 views
Plot with 2 conditions on the y axis
First, I want to clarify this is a very basic question. I'm new using R (and programming in general).
I have a data.frame with 3 columns:
block, average condition 1, average condition 2.
The ...
1
vote
2answers
580 views
R package for visualizing and exploring large datasets
I recently read about a package, which I believe had a name like "tabstat" or "tablestats" which produced a really useful plot of univariate distributions of multiple variables for large datasets. I ...
1
vote
1answer
265 views
How to draw a side-by-side plot mentioned in “Graphical Display as an Aid to Analysis”
Emerson, J. D. (1991) Graphical Display as an Aid to Analysis, in Fundamentals of Exploratory Analysis of Variance (eds D. C. Hoaglin, F. Mosteller and J. W. Tukey), John Wiley & Sons, Inc., ...
5
votes
1answer
253 views
Effective way to visualize net growth/profit/income?
A non-profit has donors with monthly commitments, which you can think of as subscriptions. What is the best way to show for each month new acquisitions, cancels, and net growth? The relationship is
...
3
votes
1answer
1k views
Panel data descriptives, plots and 'feel for the data'
Allright, so I have a dataset for around 40k firms over fiscal years 1950-2011 with about 430k firm-years. If I'm not mistaken I have panel data.
I created a unique identifier ...
16
votes
3answers
2k views
When are Log scales appropriate?
I've read that using log scales when charting/graphing is appropriate in certain circumstances, like the y-axis in a time series chart. However, I've not been able to find a definitive explanation as ...
14
votes
2answers
330 views
Combining classifiers by flipping a coin
I am studying a machine learning course and the lecture slides contain information what I find contradicting with the recommended book.
The problem is the following: there are three classifiers:
...
6
votes
1answer
701 views
Logistic quantile regression – how to best convey the results
In a previous post I’ve wondered how to deal with EQ-5D scores. Recently I stumbled upon logistic quantile regression suggested by Bottai and McKeown that introduces an elegant way to deal with ...
3
votes
1answer
292 views
What does mean by “the cumulative frequency in the form of probits”?
What does mean by the "the cumulative frequency in the form of probits" (see diagram)? How to use this methodology when one has only the Ratio and group information. I wonder how to compute these ...
2
votes
1answer
224 views
Tool to work with dataflow easier/more visual
I've written some Python code which does some (network) data analysis. It's mostly large data coming from SQL where I play around with statistics and algorithms.
However configuring the interplay ...
4
votes
2answers
274 views
Bayes Network/Conditional Probability Visualization Tools
I'm hoping that someone could suggest a tool for viewing conditional probabilities withi. I am currently using Weka, but the ability to view the conditional probability tables of nodes within the ...
6
votes
3answers
697 views
How to display multiple density or distribution functions on a single plot?
What would be the easiest way to plot in the same graph, the probability density function or the cumulative distribution function of a distribution, for 3-4 different parameter values.
Let's take ...
-2
votes
1answer
128 views
2
votes
1answer
127 views
Determining where no correlation exists
I need to determine at what value of a variable mictrb there would be almost no correlation between two other variables: ...
1
vote
3answers
364 views
Extrapolating a lowess model
Those lines are based on a lowess fit of points I have.
I would like to be able to extrapolate those lines up to x=500 for ...
5
votes
3answers
171 views
Why do we typically visually assess our assumptions?
For example, in linear regression, we assume the errors are normally distributed, have constant variance and have an expected value of 0. These assumptions all refer to the population. But we look at ...
5
votes
1answer
271 views
Visualising generalized linear model
What kind of plot are normally used in Generalized linear model and what are their interpretations?
Especially for Standardized deviance residual vs fitted value plot, what can we see from the plot?
2
votes
4answers
169 views
Visualizing counts that have some outliers
I am running a project which compares citation counts across datasets per year, and then wants to plot the general change in the frequency in which a given source is cited. Here are two example ...
11
votes
4answers
2k views
Generating visually appealing density heat maps in R
While I know that there are a series of functions for generating heat maps in R, the problem is that I'm unable to produce visually appealing maps. For example, the images below are good examples of ...
10
votes
3answers
651 views
Best way to visualize attrition using R?
Thru this site I've recently discovered Sankey Diagrams, a great way to visualize what is happening in a traditional flow chart.
Here is a good example of a Sankey Diagram by George M. Whitesides and ...
2
votes
1answer
63 views
Plotting decay in clustering?
I've got a method that produces clusters of elements and singletons. The singletons usually comprise about half of the initial element set, and there usually is a single biggest cluster of a several ...
1
vote
2answers
132 views
Comparing odds and payouts of different lotteries
I'm not a statistician, but I'm interested in how far I can push myself with my basic algebra skills, armed with a C# development background and Excel.
Suppose I have several lotteries, each with ...
2
votes
0answers
49 views
Visualization of an ensemble of sequences
What are the standard techniques of plotting a statistical ensemble of sequences?
I know the chaos game representation:
H. Joel Jeffrey (1992), Chaos game visualization of sequences. Computers ...
3
votes
3answers
379 views
Politically correct way of ordering stacked barplots?
What is the politically correct way of ordering stacked barplots that contain gender statistics? For example, in a stacked barplot for the number of grantees of a fellowship program, should one put ...
0
votes
1answer
180 views
Visualizing PCA time series
I have the following experiment. My predictors are: Plant area, 6 types of plants, 5 time points and 12 replicates for class. Time points are not equally spaced. A normal plot of Area vs. time will ...
1
vote
1answer
87 views
Is there a preferred panel chart layout?
I have a panel chart composed of 4 panels, each with 12 bars that essentially show data from a pivot table. The default layout has the first 11 rows show individual points, with the 12th row showing ...
1
vote
2answers
251 views
Advanced Excel graphs
I should not be here, I am a designer by trade and all these numbers scare me. I am attempting to help someone display their information; they sent me an excel spreadsheet and asked me to make graphs ...
3
votes
2answers
198 views
What's the recommended method for charting low values?
I need to chart a number of indicators to evaluate emergency response times for a fire department. In our case, most values should be around 2 minutes, but the range can be between 0 and 10 ...
5
votes
2answers
199 views
Visualizing the calibration of predicted probability of a model
Suppose I have a predictive model that produces, for each instance, a probability for each class. Now I recognize that there are many ways to evaluate such a model if I want to use those ...
2
votes
4answers
291 views
Visualise and interpret large set of univariate skewed data
I am trying to find out answer for this simple question. I have data (list of numbers). I have 20000 numbers. smallest number is 100 and largest is 15000. I want to interpret this data, how it is ...
2
votes
1answer
154 views
Plot by cdplot in R doesn't fit with data
I am trying to understand how cdplot in R behaves, but I am missing something. When I copy/paste the following example given in the documentation for cdplot:
...
