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Questions tagged [visualization]

Visualization is any technique for creating images, diagrams, or animations to communicate a message.

Computer visualization is an important technique for understanding and communicating complicated data and ideas.

Data visualization usually involves maps, charts, plots, or graphs, see for full details.

Idea visualization consists of representing an idea with one or more images, to aid in the comprehension of the idea, or certain aspects thereof. For example, an animation of an algorithm operating on a simple problem can greatly improve understanding of that algorithm.

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How do I assign colors to clusters in kmeans?

I keep getting error messages for my kmeans clustering. Note: I am extremely new to everything and coding in general, so I am also looking to improve in any way. I tried personally defining each color, but that did not work either. # create…
Mo Kaiser
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Plotting buy-sell signals on time series data

I'm trying to plot a time series data so that I can display buy and sell points on the data itself. This is how the data looks like: This is the close price line chart: This is the buy sell signals (I'm only printing buy sell signals for now but…
iso_9001_
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Plot a histogram, based on percentiles

I have a frame with the folowing structure: df = pd.DataFrame({'ID': np.random.randint(1, 13, size=1000), 'VALUE': np.random.randint(0, 300, size=1000)}) How could i plot the graph, where on the X-axis there will be percentiles…
Denis Ka
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Integer matrix visualization in Julia

How to convert a random integer matrix into an image with colored grids? I tried to using convert(Image, rand(Int,3,3)) after viewing a tutorial for Juno-LT, but I got julia> using Images julia> convert(Image, rand(Int,3,3)) ERROR: UndefVarError:…
GNUSupporter 8964民主女神 地下教會
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Processing Audio in Chunks with JS (WebAudio API)

I wanted to ask if there is a way to process audio with the WebAudio API in fixed-size chunks and afterward have access to those chunks. The Offline​Audio​Context doesn't seem to support that case, it only processes the graph once for the duration…
ruhig brauner
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Why do vertex normals flip after rotating 3D point cloulds?

I have two samples of 3D point cloud of human face. The blue point cloud denote target face and the red point cloud indicates the template. The image below shows that the target and template face are aligned in different directions (target face…
Patrick
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Create a geom_line, or similar, with "fading" alpha below

I would like to create a geom_line, or possibly geom_ribbon or geom_area, with a "fading-out" effect below the line similar to that used in the Thomson Reuters Eikon terminal. I've tried a very simple approach based on geom_ribbon, setting alpha…
tealeaf
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Google IntensityMap Visualization US States

I am attempting to use the google visualization library - intensity map. I have a list of states and the number of users in each state. I can only get the world map to show, I want to highlight the us states and only show us…
jhanifen
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Adding Presto as a data source for Grafana

I want to use Grafana as my visualization tool for creating dashboards. On the other hand, we are using Presto extensively in our Hadoop ecosystem. I am wondering if there is a way to visualize Presto query results with Grafana. So far I have found…
Hessam
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Change default group colors in Zeppelin visualizations

I have a bunch of data that I'm putting into a scatter plot, but the default color ordering is "blue", "lighter blue", and then finally "orange". My data comes in two groups, with constant group names, and no mater what I do, they're always the blue…
Narfanator
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yellowbrick visualiser.fit() raises ValueError

I am trying you Visualise a dispersion plot for my twitter data Here is the link to the datset dataset This is the code from yellowbrick.text import DispersionPlot text = combine['tweet'] target_words = ht_negative_unnest visualizer =…
Deepak Das
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Program to generate recursion tree for generic recursive program

Often when solving a recursive or dynamic programming problem, I find myself drawing a recursion tree to help simplify the question for me. However, for some questions which are complicated I have access to the solution but no idea how to draw the…
Hisham Hijjawi
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IndexError: too many indices for array

I am new to SE DS so please let me know if I need to edit my question. data = pd.read_csv('Desktop/dataset.csv') # Feature 1 feature_1 = data['expenses'] I have a series representing a feature column from my dataset: feature_1.head() 0 …
QFII
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Suggestions for information visualization using flash or javascript

I remember looking at a couple information visualizations tool a while back. One was written in flash and the other in Javascript. They both allowed you put notes in "bubbles" and then link them to other "bubbles". Clicking on an existing bubble…
Simon
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Is there a way to stack a set of TIFF images and reconstruct into a 3D volume using mayavi?

I am trying to stack a set of .TIFF images (obtained from x-ray micro-tomography) into a 3D volume using mayavi, but i am not able get it. I tried using mayavi.mlab.imshow(), but it just shows one image over another by some distance apart. How to…
Sdw
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