Matplotlib 简明教程

创建徽标通常意味着设计一个独特的符号或图像来代表品牌、公司、产品或组织。这涉及组合形状、颜色和文本等视觉元素来传达其所代表实体的身份和信息。

Creating a logo generally means designing a unique symbol or image that represents a brand, company, product, or organization. It involves combining visual elements like shapes, colors, and text to convey the identity and message of the entity it represents.

Create Logo in Matplotlib

您可以使用 Matplotlib 的绘图功能在 Matplotlib 中创建徽标，以设计一个可视化符号或图像来表示品牌、公司、产品或组织。

You can create a logo in Matplotlib using the library’s plotting functionalities to design a visual symbol or image that represents a brand, company, product, or organization.

与其他绘图任务类似，在 Matplotlib 中创建徽标需要结合形状、颜色、文本以及可能是图像等各种图形元素，以制作独特且可识别的标志。

Similar to other plotting tasks, creating a logo in Matplotlib requires combining various graphical elements such as shapes, colors, text, and possibly images to craft a unique and recognizable emblem.

Matplotlib 中的简单几何徽标是指使用正方形、圆形、三角形或线条等几何形状创建基本图形表示。

A simple geometric logo in Matplotlib refers to creating a basic graphical representation using geometric shapes like squares, circles, triangles, or lines.

可以使用 plt.plot() 、 plt.scatter() 、 plt.fill() 或 plt.text() 等函数来绘制不同的几何形状，并向绘图中添加文本。通过组合这些元素并进行创意排列，可以为项目、品牌或可视化设计一个简单的徽标。

You can use functions like plt.plot(), plt.scatter(), plt.fill(), or plt.text() to draw various geometric shapes and add text to your plot. By combining these elements and arranging them creatively, you can design a simple logo for your project, brand, or visualization.

Example

在以下示例中，我们使用 Matplotlib 创建一个简单的圆形徽标。我们使用 Circle() 函数绘制一个蓝色圆形，并使用 add_artist() 函数将其添加到绘图中。然后，我们关闭坐标轴，并设置纵横比以确保圆形显示为圆形 −

In the following example, we create a simple circular logo using Matplotlib. We use the Circle() function to draw a blue-colored circle and add it to the plot using the add_artist() function. We then turn off the axes, and set the aspect ratio to ensure the circle appears round −

import matplotlib.pyplot as plt

# Creating a circle
circle = plt.Circle((0.5, 0.5), 0.4, color='blue')

# Creating the plot
fig, ax = plt.subplots()
ax.add_artist(circle)

# Customizing the plot
ax.set_aspect('equal')
ax.axis('off')

# Displaying the logo
plt.show()

以下是上面代码的输出： -

Following is the output of the above code −

create logo1

Matplotlib 中的文本徽标涉及使用文本元素创建徽标或视觉表示。文本徽标不依赖于几何形状或图像，而是使用字符和符号来传达品牌或标识。

A text logo in Matplotlib involves creating a logo or visual representation using text elements. Instead of relying on geometric shapes or images, a text logo uses characters and symbols to convey a brand or identity.

在 Matplotlib 中，可以使用 plt.text() 函数向绘图中添加文本。此函数允许指定要显示的文本的位置、文本内容、字体大小、颜色和其他属性。

In Matplotlib, you can use the plt.text() function to add text to your plot. This function allows you to specify the position, text content, font size, color, and other properties of the text you want to display.

Example

在这里，我们使用 Matplotlib 创建一个基于文本的徽标。我们使用 text() 函数将单词“Logo”置于绘图中心，采用“红色”颜色和自定义字体大小 −

In here, we create a text-based logo using Matplotlib. We use the text() function to place the word "Logo" at the center of the plot with "red" color and customized font size −

import matplotlib.pyplot as plt

# Creating text
text = plt.text(0.5, 0.5, 'Logo', fontsize=50, color='red', ha='center', va='center')

# Customizing the plot
plt.axis('off')

# Displaying the logo
plt.show()

执行上述代码，我们将得到以下输出 −

On executing the above code we will get the following output −

create logo2

Matplotlib 中的复杂形状徽标是指使用复杂或详细的形状、图案和设计创建徽标。与依赖于正方形、圆形或三角形等基本形状的简单几何徽标不同，复杂形状徽标通常包含更精细复杂的元素。

A complex shape logo in Matplotlib refers to creating a logo using intricate or detailed shapes, patterns, and designs. Unlike simple geometric logos, which rely on basic shapes like squares, circles, or triangles, complex shape logos often involve more elaborate and intricate elements.

在 Matplotlib 中，可以组合 plt.plot() 、 plt.fill() 、 plt.scatter() 和 plt.polygon() 等各种绘图函数，以创建复杂的形状和图案。通过仔细排列这些元素并应用不同的颜色、样式和变换，可以设计出表达独特品牌标识或信息的复杂徽标。

In Matplotlib, you can combine various plotting functions, such as plt.plot(), plt.fill(), plt.scatter(), and plt.polygon(), to create complex shapes and patterns. By carefully arranging these elements and applying different colors, styles, and transformations, you can design intricate logos that convey a unique brand identity or message.

复杂形状徽标可以包含各种元素，例如曲线、曲线、弧线、多边形和其他几何形状。它们还可以包括文本、图像或其他视觉元素。

Complex shape logos can include a wide range of elements, such as curves, curves, arcs, polygons, and other geometric shapes. They may also consist of text, images, or other visual elements.

Example

现在，我们通过组合椭圆、多边形和星星来创建一个复杂形状的徽标。我们分别使用 Ellipse 和 Polygon 类创建每个形状。然后使用 add_artist() 函数将每个形状添加到绘图中 −

Now, we create a logo with a complex shape by combining an ellipse, a polygon, and a star. We create each shape the Ellipse and Polygon classes, respectively. We then use the add_artist() function to add each shape to the plot −

import matplotlib.pyplot as plt
from matplotlib.patches import Ellipse, Polygon

# Creating an ellipse
ellipse = Ellipse((0.5, 0.5), width=0.7, height=0.4, angle=45, color='orange')

# Creating a polygon
vertices = [[0.2, 0.4], [0.8, 0.4], [0.6, 0.8], [0.4, 0.8]]
polygon = Polygon(vertices, closed=True, color='blue')

# Creating a star
star_vertices = [[0.3, 0.6], [0.4, 0.9], [0.5, 0.6], [0.6, 0.9], [0.7, 0.6],
   [0.5, 0.4], [0.3, 0.6]]
star = Polygon(star_vertices, closed=True, color='green')

# Creating the plot
fig, ax = plt.subplots()
ax.add_artist(ellipse)
ax.add_patch(polygon)
ax.add_patch(star)

# Customizing the plot
ax.set_aspect('equal')
ax.axis('off')

# Displaying the logo
plt.show()

执行上面的代码后，我们得到以下输出： -

After executing the above code, we get the following output −

create logo3

Matplotlib 中的图像徽标是指在绘图中使用图像或图片作为徽标。可以插入现有图像文件（例如 PNG、JPEG 或 GIF）到 Matplotlib 绘图中，而不是创建形状、线条或文本来形成徽标。

An image logo in Matplotlib refers to using an image or picture as a logo in a plot. Instead of creating shapes, lines, or text to form a logo, you can insert an existing image file, such as a PNG, JPEG, or GIF, into your Matplotlib plot.

要向 Matplotlib 绘图添加图像徽标，可以使用 plt.imshow() 函数，该函数可在绘图中显示图像。首先需要加载图像文件，然后将图像数据传递给 plt.imshow() 以在绘图中显示它。

To add an image logo to a Matplotlib plot, you can use the plt.imshow() function, which displays an image on the plot. You will first need to load the image file and then pass the image data to plt.imshow() to display it within your plot.

Example

在以下示例中，我们使用 Matplotlib 使用外部图像文件创建一个徽标。我们使用 imread() 函数加载图像，然后使用 imshow() 函数显示图像 −

In the following example, we create a logo using an external image file with Matplotlib. We load the image using the imread() function and then display it using the imshow() function −

import matplotlib.pyplot as plt
import matplotlib.image as mpimg

# Loading image
img = mpimg.imread('tutorialspoint_logo.png')

# Displaying image
plt.imshow(img)
plt.axis('off')

# Displaying the logo
plt.show()

执行上述代码，我们将得到以下输出 −

On executing the above code we will get the following output −

create logo4