Questions tagged [visualization]
Visualization is any technique for creating images, diagrams, or animations to communicate a message.
visualization
1,428
questions
450
votes
14
answers
694k
views
Side-by-side plots with ggplot2
I would like to place two plots side by side using the ggplot2 package, i.e. do the equivalent of par(mfrow=c(1,2)).
For example, I would like to have the following two plots show side-by-side with ...
- 43.2k
950
votes
11
answers
1.4m
views
How to make IPython notebook matplotlib plot inline
I am trying to use IPython notebook on MacOS X with Python 2.7.2 and IPython 1.1.0.
I cannot get matplotlib graphics to show up inline.
import matplotlib
import numpy as np
import matplotlib.pyplot ...
- 10.6k
92
votes
2
answers
186k
views
Construct a manual legend for a complicated plot
I cannot figure out how to manually set up a legend for this plot. All I really want is a simple legend to the right that uses the three colors and has a name next to each.
The current code looks ...
- 1,133
89
votes
5
answers
161k
views
sql joins as venn diagram
I've had trouble understanding joins in sql and came upon this image which I think might help me. The problem is that I don't fully understand it. For example, the join in the top right corner of the ...
- 11.5k
22
votes
4
answers
33k
views
ggplot, facet, piechart: placing text in the middle of pie chart slices
I'm trying to produce a facetted pie-chart with ggplot and facing problems with placing text in the middle of each slice:
dat = read.table(text = "Channel Volume Cnt
AGENT ...
- 19.6k
189
votes
14
answers
45k
views
Workflow for statistical analysis and report writing
Does anyone have any wisdom on workflows for data analysis related to custom report writing? The use-case is basically this:
Client commissions a report that uses data analysis, e.g. a population ...
- 5,117
28
votes
6
answers
43k
views
How to use GLUT/OpenGL to render to a file?
I have a program which simulates a physical system that changes over time. I want to, at predetermined intervals (say every 10 seconds) output a visualization of the state of the simulation to a file. ...
- 3,878
6
votes
1
answer
4k
views
Plotting volumetric data in MATLAB
I am working in Matlab and I have a 3d matrix with dimensions 384x512x160, which is made of 384x512 slices.
How can I plot data like that?
- 383
91
votes
3
answers
165k
views
Matplotlib - label each bin
I'm currently using Matplotlib to create a histogram:
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as pyplot
...
fig = pyplot.figure()
ax = fig.add_subplot(1,1,1,)
n, bins, ...
- 17.1k
106
votes
1
answer
200k
views
Relationship between dpi and figure size
I have created a figure using matplotlib but I have realized the plot axis and the drawn line gets zoomed out.
Reading this earlier discussion thread, it explains how to set the figure size.
fig, ax =...
- 2,153
373
votes
11
answers
916k
views
How do I convert a numpy array to (and display) an image?
I have created an array thusly:
import numpy as np
data = np.zeros( (512,512,3), dtype=np.uint8)
data[256,256] = [255,0,0]
What I want this to do is display a single red dot in the center of a ...
- 3,833
94
votes
10
answers
59k
views
Sankey Diagrams in R?
I am trying to visualize my data flow with a Sankey Diagram in R.
I found this blog post linking to an R script that produces a Sankey Diagram; unfortunately, it's quite raw and somewhat limited (see ...
- 7,878
70
votes
4
answers
55k
views
How can I bring a circle to the front with d3?
First of all, I am using d3.js to display different sized circles in arrays. On mouse over, I want the circle being moused over to become bigger, which I can do, but I have no idea how to bring it to ...
- 1,093
104
votes
3
answers
122k
views
Heatmap in matplotlib with pcolor?
I'd like to make a heatmap like this (shown on FlowingData):
The source data is here, but random data and labels would be fine to use, i.e.
import numpy
column_labels = list('ABCD')
row_labels = ...
- 12.4k
77
votes
2
answers
66k
views
Fix Node Position in D3 Force Directed Layout
I want some of the nodes in my force-directed layout to ignore all forces and stay in fixed positions based on an attribute of the node, while still being able to be dragged and exert repulsion on ...
- 4,649