visualization

问题 I am reading on Tufte's data-ink ratio and I was wondering if it is possible to measure the amount of "ink" a plot uses? If not possible in R perhaps with another tool such as GIMP or imagemagick? 回答1: I'd suggest using grid.cap() to convert the contents of the graphics device to a raster, after which it's a simple matter to compute the proportion of non-white pixels (aka "ink"). In the following example, to focus the computations on ink in the plotting area, I've set par(mar=c(0,0,0,0)) ,

问题 I'm starting with kibana and I see a lot of pictures where kibana has different visual than on official web site. I like it more but I can't find how to switch on it. You may think that I'm talking bout black dashboard theme but it's not exactly what I'm looking for. On pictures I saw kibana seems to be fully dark and even have different layout. Let me show Hope now it's understandable what I mean. If so, can someone help me and tell how can I get this fully dark kibana ? or tell me where I'm

问题 This would be a replacement for a log scale so that it can deal with negative numbers. Haven't seen many examples of custom scales though I've been trying to use d3's logarithmic scale's source as a starting point. 回答1: As far as I know there are no ways to make custom scales in D3 (at least not in the sense you are looking for). All D3 scales scale in two steps: using the domain, deinterpolate the input given a deinterpolation function using the range, interpolate the intermediate result

问题 Is there a Python library for generating Sankey diagrams? I've seen this list of Sankey diagram applications and libraries, but none of them is in Python. 回答1: Apparently matplotlib 1.1 can now do this. Code and sample output is here. Below is a screenshot demonstrating what it can do. 回答2: I did a Google search on "Python graph visualization" and found some stuff. There are several libraries that have "spring" behavior where the software balances out a graph and makes it pretty; they do much

问题 Is there a Python library for generating Sankey diagrams? I've seen this list of Sankey diagram applications and libraries, but none of them is in Python. 回答1: Apparently matplotlib 1.1 can now do this. Code and sample output is here. Below is a screenshot demonstrating what it can do. 回答2: I did a Google search on "Python graph visualization" and found some stuff. There are several libraries that have "spring" behavior where the software balances out a graph and makes it pretty; they do much

问题 I use scatterplot3d to plot 3D with R. The orientation of the y-axis label bothers me because it is vertical and not parallel to the y-axis. Is there a way to rotate the label and adjust its angle? Unfortunately, I didn't finde anything in the documentation. 回答1: If you don't have to draw many plots and are willing to adjust values manually, you can pass ylab = "" when making the 3d scatter and then add text later on with appropriate srt value. srt allows you to rotate text at desired angle.

问题 I am using matplotlib to draw a plot. The x and y axises are discrete values and therefore, several (x,y) points in the list have the same values. For example, assume we have the following x,y points: x=[0,1,1,2,2,2,2,2] y=[0,1,2,3,3,3,3,5] Now all of the (x,y) points occur once, but (2,3) occurs 4 times. When I use plt.scatter(x,y) , it only shows (2,3) as a regular point, once. How is it possible to show the density of occurrence, too? For example, a bigger marker? 回答1: You can pass an

问题 I am using matplotlib to draw a plot. The x and y axises are discrete values and therefore, several (x,y) points in the list have the same values. For example, assume we have the following x,y points: x=[0,1,1,2,2,2,2,2] y=[0,1,2,3,3,3,3,5] Now all of the (x,y) points occur once, but (2,3) occurs 4 times. When I use plt.scatter(x,y) , it only shows (2,3) as a regular point, once. How is it possible to show the density of occurrence, too? For example, a bigger marker? 回答1: You can pass an

问题 How can i add Audio Visualization support to this class, i would like to add an Audio() object as an input to a GLSL Fragment Shader. An Example of this is https://www.shadertoy.com/view/Mlj3WV. I know this sort of thing can be done in Canvas 2d with waveform Analysis, but this opengl method is far more smooth. /* Code from https://raw.githubusercontent.com/webciter/GLSLFragmentShader/1.0.0/GLSLFragmentShader.js */ /* render function */ /* set the uniform variables for the shader */ gl

问题 I am working on web crawler visualization using D3 that uses a forced-based labeled graph like the one shown here: Force-based label placement graph I am unable to get two parent nodes to have the same common child. Is this not possible using this graph? Because the example case shows such a scenario where two nodes share the same child. How do I do this? I am using the following script on my webpage to populate and show the graph (The array being shown in the script is just a dummy array I