标签: scatter-plot

可能重复:
Python,Matplotlib,子图:如何设置轴范围？

我想为我的散点图指定类似于excel的x轴的比例.

例如,我输入x轴值如下:

x_values = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]

但是,只显示偶数为1位的数字.

有没有办法让所有数字出现在x轴上？

谢谢,

PARTH

如何使用核心图绘制带有间隙的散点图？我正在使用核心绘图库.一切都工作正常,但现在我想在数据线的开头或中间做一个带有间隙的散点图？有人帮帮我吗？

与一篇热门帖子类似,我想修改以下代码(来自R文档中的examples ()命令示例):

## put (absolute) correlations on the upper panels,
## with size proportional to the correlations.
panel.cor <- function(x, y, digits = 2, prefix = "", cex.cor, ...)
{
    usr <- par("usr"); on.exit(par(usr))
    par(usr = c(0, 1, 0, 1))
    r <- abs(cor(x, y))
    txt <- format(c(r, 0.123456789), digits = digits)[1]
    txt <- paste0(prefix, txt)
    if(missing(cex.cor)) cex.cor <- 0.8/strwidth(txt)
    text(0.5, 0.5, txt, cex = cex.cor * r)
}
pairs(USJudgeRatings, lower.panel = panel.smooth, upper.panel = …

如何将逻辑回归结果的统计图添加到散点图中？我想要彩色的0/1区域，该区域描绘了分类器的决策边界。

import pandas as pd
import numpy as np
import pylab as pl
import statsmodels.api as sm

# Build X, Y from file
f = open('ex2data2.txt')
lines = f.readlines()
x1 = []
x2 = []
y = []
for line in lines:
    line = line.replace("\n", "")
    vals = line.split(",")
    x1.append(float(vals[0]))
    x2.append(float(vals[1]))
    y.append(int(vals[2]))

x1 = np.array(x1)
x2 = np.array(x2)
y = np.array(y)

x = np.vstack([x1, x2]).T

# Scatter plot 0/1s
pos_mask = y == 1
neg_mask = y == 0
pos_x1 …

我发现的每个例子都显示所有散点图都是随机半径.有可能让它们大小相同吗？如果我尝试静态设置半径,则所有圆圈都将非常小(我假设默认半径).但是,如果我在大多数示例中使用Math.random(),则会有大小的圆圈.我希望所有的圈子都很大.有没有办法做到这一点？这是使用Math.random()形成图数据的代码片段(由于某种原因,这可以正常工作):

function scatterData(xData, yData) 
{
  var data = [];

  for (var i = 0; i < seismoNames.length; i++) 
  {
    data.push({
      key: seismoNames[i],
      values: []
    });

    var xVals=""+xData[i];
    xVals=xVals.split(",");
    var yVals=""+yData[i];
    yVals=yVals.split(",");

    for (var j = 0; j < xVals.length; j++) 
    {
      data[i].values.push({
        x: xVals[j], 
        y: yVals[j], 
        size: Math.random()
      });

    }
  }

  return data;
}

Math.random()吐出0到1之间的值,例如0.164259538891095和0.9842195005008699.我已经尝试将这些作为静态值放在'size'属性中,但不管圆圈总是很小.有什么我想念的吗？

如何使用java中的jfreechart在mysql数据库表中绘制数据的散点图.我用过swing库.任何链接都会有所帮助.我搜索谷歌但无法找到理解解决方案.如果你有代码,请提供给我.实际上我做了barchart并使用jfreechart绘制它.我用于条形图的代码就在这里.这里display3函数显示条形图.如何修改它以显示散点图？

public void display3() throws SQLException, ClassNotFoundException{

    DefaultCategoryDataset dataset = new DefaultCategoryDataset();

    String JDBC_DRIVER="com.mysql.jdbc.Driver";
    String DB_URL="jdbc:mysql://localhost/data2";
    Connection conn;
    Statement stmt;
    String USER = "root";
    String PASS = "";
    try{
        Class.forName(JDBC_DRIVER);
        conn=DriverManager.getConnection(DB_URL,USER,PASS);
        System.out.println("Creating statement...");
        stmt = conn.createStatement();

        String sql;
        sql="SELECT * FROM `production` WHERE crop_id = 1 AND location_id = 1";
        ResultSet rs=stmt.executeQuery(sql);

        while (rs.next()){
            //String student = rs.getString("studentname");
            String yeartext = rs.getString("year_of_production");
            //double value = Double.parseDouble(text);
            String productiontext = rs.getString("production_amount");
            double production = Double.parseDouble(productiontext);
            Integer year = Integer.parseInt(yeartext);

            dataset.setValue(production, "production", …

我有一个散点图:

fig,ax = plt.subplots(figsize=(6,5),dpi=200)

ax.scatter(df1['id'],df1['resellers'],c='red',s=df1['ips']/80,label='AS Size = IPs seen in dnsdb')
ax.set_xticks([1,2,4,6,8,10,12,14,16,18,20])
ax.set_xlim(-1,22)
ax.legend(
       scatterpoints=1,
   loc='best',
   ncol=1,
   fontsize=12)

我想知道如何将图例中气泡的形状和大小更改为矩形和更小的尺寸.有人可以帮忙吗？

我正在尝试从以下字典中绘制散点图：

data_dict = {12: [1, 17, 11, 17, 1, 14, 38], 13: [13, 6, 4, 6], 14: [15, 8, 20, 8, 7], 15: [2, 3, 3, 1], 16: [62, 13, 36, 3, 8, 99, 54], 17: [1], 18: [44, 30, 36, 14, 21, 13, 44, 1, 62, 36], 19: [5, 5], 20: [27, 42, 42, 18, 31, 55, 31, 55], 21: [59, 1, 42, 17, 66, 26, 18, 4, 36, 42, 20, 54, 44, 35]}

我正在使用以下代码绘制散点图，其中字典键是x值，是相应的值。

for xe, ye in …

我正在使用ggplot2创建一个带有散点图叠加的分组箱图.我想将每个散点图数据点与它对应的分组框图进行分组.

但是,我也喜欢散点图是不同的符号.我似乎能够将我的散点图分组与我的分组箱图分组,或者将我的散点图点指向不同的符号......但不能同时进行.下面是一些示例代码,用于说明发生的情况:

library(scales)
library(ggplot2) 

# Generates Data frame to plot
Gene <- c(rep("GeneA",24),rep("GeneB",24),rep("GeneC",24),rep("GeneD",24),rep("GeneE",24))
Clone <- c(rep(c("D1","D2","D3","D4","D5","D6"),20))
variable <- c(rep(c(rep("Day10",6),rep("Day20",6),rep("Day30",6),rep("Day40",6)),5))
value <- c(rnorm(24, mean = 0.5, sd = 0.5),rnorm(24, mean = 10, sd = 8),rnorm(24, mean = 1000, sd = 900), 
           rnorm(24, mean = 25000, sd = 9000), rnorm(24, mean = 8000, sd = 3000))
    value <- sqrt(value*value)
        Tdata <- cbind(Gene, Clone, variable)
        Tdata <- data.frame(Tdata)
            Tdata <- cbind(Tdata,value)

# Creates the Plot of All Data
# The below code groups …

我是Pandas的新手,我一直在尝试用Python 2.7做一个散点图,我在.txt文件中的数据集是这样的(逗号分隔)

6.1101,17.592
5.5277,9.1302
8.5186,13.662
7.0032,11.854
5.8598,6.8233
8.3829,11.886
7.4764,4.3483



import pandas as pd
import matplotlib.pyplot as mplt

# Taking Dataset using Pandas

input_data = pd.read_csv('data.txt');
#input_data.head(5)

如何在数据集上没有任何标题的散点图中绘制上述数据？

我在教程和示例中看到,如果数据集具有列标题,则可以绘制散点图.我尝试将x和y作为.txt文件中数据集的两列的标题,并尝试以下代码.

input_data = pd.read_csv('data.txt');
#input_data.head(5)
x_value = input_data[['x']]
y_value = input_data[['y']]

mplt.scatter(x_value, y_value)

但是我仍然会收到错误,如下所示

Traceback (most recent call last):
  File "E:\IIT Madras\Research\Experiments\Machine Learning\Linear Regression\Linear_Regression.py", line 16, in <module>
    y_value = input_data[['y']]
  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 1791, in __getitem__
    return self._getitem_array(key)
  File "C:\Python27\lib\site-packages\pandas\core\frame.py", line 1835, in _getitem_array
    indexer = self.ix._convert_to_indexer(key, axis=1)
  File "C:\Python27\lib\site-packages\pandas\core\indexing.py", line 1112, …