histogram ggplot2

Each image has a specific number of features. The difference is what these features are based on. In this example, image retrieval is based on color features. It is undeniable that color is one of the most important features of an image. For gray-scale images, we can use a gray-scale histogram, color images can be detected based on color histograms. Advantages of color histogram Detection: detection errors

It is also not difficult to draw a horizontal histogram, first inserting a G in SVG and then inserting a rect in G.1.html CodeDOCTYPE HTML>HTML> Head> MetaCharSet= "Utf-8" /> title>title> Head> Body> DivID= "Container">Div> Body> Scripttype= "Text/javascript"src= "Js/d3.js" >Script> Scripttype= "Text/javascript"src= "Js/shuzhuangtu.js" >Script>HTML>2.js Codevardata = [1,3,4,6,2,9,7,3,8],bar_height= 50, Bar_paddin

The topic is to calculate the maximum rectangular area of the histogram, the following is my practice, I also see on the internet that some people say can be solved by the way of the stack, because of the time problem, and do not try immediately, next time in a try it!!And there's the variable: the largest rectangular area of the matrix, where the elements in the matrix can only be 1 and 0, the code will be reissued next time!!The code is as follows:#

Title Link: http://poj.org/problem?id=2559The rectangle with the largest area within the given histogram is obtained.Using a thing called a monotone stack, the idea is much like DP, that is, each bar as a structure, the height of the current bar and its previous (left) can reach the maximum horizontal distance, and only meet the conditions when the stack.1#include 2#include 3#include 4#include 5#include 6#include 7#include 8#include 9#include Ten#incl

Given n non-negative integers representing the histogram's bar height where the width of each bar are 1, find the area of L Argest rectangle in the histogram.Above is a histogram the where width of each bar is 1, given height = [2,1,5,6,2,3].The largest rectangle is shown in the shaded area, and which has an area = ten unit.For example,Given Heights = [2,1,5,6,2,3],Return 10.1. What should I do if the height array is known to be ascending?Like 1,2,5,7

I do not know which version of the Thunderbolt, there is a "download speed histogram" of the small interface, I prefer (but the latest version of the Thunderbolt is not), so decided to cottage one. Of course, this cottage can not download files, hehe.Ideas:1: Paint the background of the interface black2: Generate a random number every 0.1 seconds and add them to a container3: Overload the PaintEvent function, starting from the right side of the interf

Echarts Home: http://echarts.baidu.com/index.htmlEcharts-2.1.8:http://echarts.baidu.com/build/echarts-2.1.8.zipEcharts Official Example: http://echarts.baidu.com/doc/example.htmlEcharts Official API Document: Http://echarts.baidu.com/doc/doc.htmlEcharts Series-Histogram (bar chart) Example 11, project structurejs folder: After downloading the echarts, decompression, such as the root directory after decompression is echarts-2.1.8, then to Echarts-2.1.8

directly on the code:1 fromMatplotlibImportPyplot as Plt2 3 #parameters are list, header, x-axis label, y-axis label, XY axis range4 defdraw_hist (Mylist,title,xlabel,ylabel,xmin,xmax,ymin,ymax):5Plt.hist (mylist,100)6 Plt.xlabel (Xlabel)7 Plt.xlim (Xmin,xmax)8 Plt.ylabel (Ylabel)9 Plt.ylim (Ymin,ymax)Ten Plt.title (title) One plt.show () A - -Draw_hist (Arealist,'areaslist',' Area',' Number', 50.0,250,0.0,8)#Histogram display theDraw_hist (Perimet

Company project to use JS to draw a histogram, originally wanted to use a plug-in bar chart.js suddenly think we can not use so big plug-ins, write a bar, you can also see their point of math level can not!There's a few little highlights.1. function x and function y convert coordinates if the upper left corner of the canvas is the origin, that's a lot of pit-daddy.2. Draw the rectangle with a thick line, ah, the rectangle that the four points is reall

", 232.33f ); Chart3.BindValue ("B", 83.30f ); Chart3.BindValue ("C", 200f ); Chart3.BindValue ("D", 100f ); Chart3.FilePath = "TempImage "; Chart3.ColorList = colorList; Chart3.TypeNameList = TypeNameList; Chart3.FileName = fileName + "chart3 "; Chart3.FontName = "Arial "; Chart3.Precision = 2; Chart3.Distance = 40; Chart3.Scale = 50f; Chart3.ShowTip = true; Chart3.IsGradient = true; Chart3.ID = "SADADA ";Panel1.Controls. Add (chart3 ); Histogram