编程怎么做统计图片教程

时间:2025-01-28 11:17:20 网络游戏

统计图片的教程可以根据不同的编程语言和工具进行分类。以下是几种常见编程语言的统计图片教程:

1. 使用C制作统计图

柱状图

```csharp

Bitmap image = new Bitmap(width, height);

Graphics g = Graphics.FromImage(image);

try

{

g.Clear(Color.White);

Font font = new Font("Arial", 10, FontStyle.Regular);

// 画图片的边框线

g.DrawRectangle(new Pen(Color.Blue), 0, 0, image.Width - 1, image.Height - 1);

// 加上各种随机色

ArrayList colors = new ArrayList();

Random rnd = new Random();

for (int i = 0; i < 2; i++)

{

colors.Add(Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256)));

}

// 绘制柱状图

for (int i = 0; i < data.Length; i++)

{

int barWidth = (int)((data[i].Value / (double)maxValue) * image.Width);

g.FillRectangle(new SolidBrush(colors[i % colors.Count]), i * barWidth, image.Height - (int)(data[i].Value / (double)maxValue) * image.Height), barWidth, (int)(data[i].Value / (double)maxValue) * image.Height);

}

}

finally

{

image.Save("chart.png", ImageFormat.Png);

}

```

折线图

```csharp

Bitmap image = new Bitmap(width, height);

Graphics g = Graphics.FromImage(image);

try

{

g.Clear(Color.White);

Font font = new Font("Arial", 10, FontStyle.Regular);

// 画图片的边框线

g.DrawRectangle(new Pen(Color.Blue), 0, 0, image.Width - 1, image.Height - 1);

// 绘制折线图

PointF[] points = new PointF[data.Length];

for (int i = 0; i < data.Length; i++)

{

points[i] = new PointF(i * barWidth, image.Height - (int)(data[i].Value / (double)maxValue) * image.Height);

}

g.DrawLines(Pens.Black, points);

}

finally

{

image.Save("line_chart.png", ImageFormat.Png);

}

```

扇形图

```csharp

Bitmap image = new Bitmap(width, height);

Graphics g = Graphics.FromImage(image);

try

{

g.Clear(Color.White);

Font font = new Font("Arial", 10, FontStyle.Regular);

// 画图片的边框线

g.DrawRectangle(new Pen(Color.Blue), 0, 0, image.Width - 1, image.Height - 1);

// 绘制扇形图

int total = data.Sum(d => d.Value);

for (int i = 0; i < data.Length; i++)

{

int sliceAngle = (int)((data[i].Value / (double)total) * 360);

int startAngle = 360 - sliceAngle;

g.DrawPie(Pens.Black, 0, 0, image.Width, image.Height, startAngle, sliceAngle);

}

}

finally

{

image.Save("pie_chart.png", ImageFormat.Png);

}

```

2. 使用Python和OpenCV进行图像处理

统计图片中特定颜色的个数