histogram

This question already has an answer here: Pyplot sorting y-values automatically 2 answers In this example: import matplotlib.pyplot as plt colors = ['white', 'orange', 'green', 'purple'] rates = ['5','5','4','3'] plt.bar(colors, rates) the bars in the plot are ordered by the alphabetic order. How do I make them to show in the same order as they are in the code (from highest to lowest rate)? Matplotlib 2.1 provides the new option to use strings as input to its plotting functions - called "categoricals". This is a new feature and not yet completely working. One caveat is that strings are

I'm doing data-analysis in Matlab and I'm plotting the frequencies of discrete values (1-15) into a histogram on Matlab. I would like to center the bins so that the center of 1st bin is on value 1, center of the 2nd bin is on value 2, etc. Also I would like to get percentage range for the Y-axis. Any quick ideas how to do this? Here is a picture highlighting my question: Start by using hist with your expected centers. Then use bar and xlabel to display the histogram with the y axis the way you want: dat = randi(15,100,1); centers = 1:15; counts = hist(dat,centers); pcts = 100 * counts / sum

I have a (3D) Histogram which I like to apply Gaussian smoothing on: cv::MatND Hist; In the 1D and 2D cases I blur it via: cv::GaussianBlur(Hist, Hist, cv::Size(1,3), 1.0);// 1D case cv::GaussianBlur(Hist, Hist, cv::Size(3,3), 1.0);// 2D case But I struggle to apply Gaussian blurring in the 3D case. Has anyone got an idea how to attempt this? Try use separable kernels like shown here: http://www.programming-techniques.com/2013/03/gaussian-blurring-using-separable.html 来源： https://stackoverflow.com/questions/18020438/opencv-gaussian-blur-smoothing-of-3d-matrix-histogram

Possible Duplicate: how to convert numbers into symbols in java? for example instead of 2 to **, or 3 to *** etc. How can I convert numbers into a histogram ? The histogram should display the bar graphs from 2-12 based upon how many times that value was rolled. currently my output is like the second pic but is suppose to look like the first one. thanks. public static void main(String[] args) { // TODO code application logic here System.out.print("Please enter how many times you want to roll two dice?"); Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int [] rolls = new int[n];

yesteraday I made a similar question ( this one ). I could not display the value on top of bar in a gnuplot histogram. I lost many time because I couldn't find really good documentation about it, and I only can find similar issues on differents websites. I lost many time with that but fortunately someone give me the solution. Now I am having a similar issue with an histogram with two bars, in which I have to put on top of both bars its value. I am quite near, or that is what I think, but I can't make it work properly. I am changing the script and regenerating the graph many times but I am not