heatmap

问题 I have a list of values each with latitude and longitude. I'm looking to create a translucent heatmap image to overlay on Google Maps. I know there are server side and flash based solutions already, but I want to build this in javascript using the canvas tag. However, I can't seem to find a concise description of the algorithm used to turn coordinates and values into a heatmap. Can anyone provide or link to one? Thanks. 回答1: The basic idea would be to create a grid and project every lat,lng

问题 I have a list of values each with latitude and longitude. I'm looking to create a translucent heatmap image to overlay on Google Maps. I know there are server side and flash based solutions already, but I want to build this in javascript using the canvas tag. However, I can't seem to find a concise description of the algorithm used to turn coordinates and values into a heatmap. Can anyone provide or link to one? Thanks. 回答1: The basic idea would be to create a grid and project every lat,lng

问题 My client wants to show a heat map of all the countries from where ever he recieves updates. Like if one of his shop closed in America he wants me to show entire country in red color and if a new one opened in Brazil then it should show brazil in green color. And when I tap on brazil it zooms in and shows pin annotations for where ever the shops are opened and closed. So my question is can someone guide me how to show a particular country on map view in a particular color.. Thanks in advance.

问题 I need to draw 3 different plots setting the same scale range color. I have 3 matrices with different range of values. For example: range(matrixA) # 0.60 0.85 range(matrixB) # 0.65 0.95 range(matrixA) # 0.5 1.0 I would like to have the same color fill for the plots. For example, for all 0.8 value in the difference plots, if in the first plot 0.8 orange, I want all 0.8 value in different graphs to be the same orange. My problem in this moment is: In the first plot, the color of the max value

问题 I would appreciate any info material on the dendograms (Colv, Rowv) of R's heatmap function. Such as how the clustering works (is it euclidean distance?). You don't have to post lengthy explanations, I would already be happy about some keywords that could bring me on the right track so I could do some online research. Here is an excerpt from the help manual, which confuses me a little bit. What does "honored" mean in this context and how is it different from reordering? If either Rowv or Colv

问题 I have done a Heat Map using the function heatmap.2 of gplots in R, but I don't have an idea of how to coloring the branches and tick labels per groups (Eg. if I cut the tree to have four gruops like in my second figure). I have checked that it is possible to color the dendrogram alone using dendextend package. Also there is a heatmap here: selecting number of leaf nodes of dendrogram in heatmap.2 in R with a colored dendrogram, but I can't implement it in my example. Somebody can help me

问题 I am plotting a heatmap in Python with the seaborn package. The values I am plotting are discrete, they are the integers -1 , 0 , and 1 . I would like the cells in the heatmap with the value -1 to show up green, those with 0 as yellow, and 1 as red. Is it possible to specify this ruling in the cubehelix_palette() or colour_palette() functions? 回答1: You can use matplotlib's ListedColormap as follows: import numpy as np import seaborn as sns from matplotlib.colors import ListedColormap data =

问题 Here is my dataframe: jan f m a m j \ 2000 -7.894737 22.387006 22.077922 14.5455 15.8038 -3.33333 2001 -3.578947 11.958763 28.741093 5.05415 74.7151 11.2426 2002 -24.439661 -2.570483 1.810242 8.56044 84.5474 -26.9753 2003 14.410453 -10.106570 8.179654 -11.6469 -15.0022 -13.9757 2004 -3.978623 -13.280310 2.558639 -1.13076 12.7156 -4.47235 2005 2.018146 1.385053 9.461930 14.1947 -10.4865 -11.1553 2006 -6.528617 -5.506220 -2.054323 1.39073 7.74041 -0.328937 2007 -1.634891 8.923088 4.951521 -1

问题 This question follows from these two topics: How to use stat_bin2d() to compute counts labels in ggplot2? How to show the numeric cell values in heat map cells in r In the first topic, a user wants to use stat_bin2d to generate a heatmap, and then wants the count of each bin written on top of the heat map. The method the user initially wants to use doesn't work, the best answer stating that stat_bin2d is designed to work with geom = "rect" rather than "text". No satisfactory response is given

问题 The goal is to build something like http://rentheatmap.com/sanfrancisco.html I got map with ggmap and able to plot points on top of it. library('ggmap') map <- get_map(location=c(lon=20.46667, lat=44.81667), zoom=12, maptype='roadmap', color='bw') positions <- data.frame(lon=rnorm(100, mean=20.46667, sd=0.05), lat=rnorm(100, mean=44.81667, sd=0.05), price=rnorm(10, mean=1000, sd=300)) ggmap(map) + geom_point(data=positions, mapping=aes(lon, lat)) + stat_density2d(data=positions, mapping=aes(x