data-visualization

I'd like to generate a choropleth map using the following data points: Longitude Latitude Price Here is the dataset - https://www.dropbox.com/s/0s05cl34bko7ggm/sample_data.csv?dl=0 . I would like the map to show the areas where the price is higher and the where price is lower. It should most probably look like this (sample image): Here is my code: library(ggmap) map <- get_map(location = "austin", zoom = 9) data <- read.csv(file.choose(), stringsAsFactors = FALSE) data$average_rate_per_night <- as.numeric(gsub("[\\$,]", "", data$average_rate_per_night)) ggmap(map, extent = "device") + stat

I'm building a bar chart in d3.js with an ordinal x-axis whose ticks should label the chart with text. Could anyone explain how the ordinal scale "maps" x ticks to the corresponding bar positions? Specifically, if I want to designate the x tick labels with an array of text values to the corresponding bars in a bar chart. Currently I'm setting the domain as the following: var labels = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t"]; var xScale = d3.scale.ordinal() .domain(labels) However, values of 1-19 are showing after the text labels. As seen in this fiddle:

I am currently in the startup of my new project. It's a data visualisation project, where I want to develop an application that can visualise data (no matter where it comes from). Right now,I am trying to find a visualisation library that I can use. Which one do you recommend? For me it looks like the main libraries are in javascript(D3.js). I wanted to develop an desktop application, but maybe I should just face it and switch to web based? I have experience in java,python and C#. MarcoL What kind of data do you have to visualize? Before starting with a list of solutions I would recommend to

I'm trying to use the D3 Tree Layout to create a family tree of sorts and one of the things I noticed is that when I have many children nodes, it would stretch out horizontally across the screen. Ideally I would like a more vertical layout for these nodes so that people don't have to scroll across the screen and can just keep looking down the tree. Here is what I currently see: Now it might not be that bad, but if I had say 20 children, it would span across the whole screen and that is something I kind of want to avoid. I have seen questions like this but this doesn't help me because I want a

I have a customer who needs to convert a diagramming application (which was developed in MFC a long time ago) to C#. The application displays large networks (lots of graphical elements), and lets the user edit/manipulate the data through a graphical ui. I decided that it would be best to use a library rather than to develop all from scracth (all graphic objects/selection/tools/events/etc) I am looking for a commercial solution. I found three that seem to be very mature, and I wonder if anyone had used them and can write his/her opinon: Tom Sawyer Visualization IBM ILog Diagrammer for .Net

I'm currently using the charting within .NET using System.Windows.Forms.DataVisualization.Charting.Chart . Thus far it seems very powerful, and works great. However, there is a huge problem in terms of how it is auto-calculating intervals. I use a lot of double values, and in libraries like ZedGraph, it handles this perfectly. It selects min/max/interval just fine. However, in MS Chart, it may select 206.3334539832 as a minimum, and intervals of a similar decimal precision. Obviously this looks quite ugly. So, I tried simply making the axis format {0.00} and it works great when it loads the