An in-depth explanation of color options for Matlab plots.

1 year ago
Liam
2 minutes

In MATLAB, it is possible to draw graphs using different colors. Here is a detailed explanation of some plotting colors.

  1. Color abbreviations: In MATLAB, some abbreviations are used to represent common colors. For example, ‘r’ stands for red, ‘b’ for blue, ‘g’ for green, ‘y’ for yellow, ‘k’ for black, and ‘w’ for white.
  2. RGB colors: You can specify colors using RGB values. The RGB values represent the blending ratio of red, green, and blue, ranging from 0 to 1. For example, [1 0 0] represents pure red, [0 1 0] represents pure green, and [0 0 1] represents pure blue.
  3. Color Names: MATLAB has some predefined color names that can be used directly. For example, ‘red’ represents the color red, ‘blue’ represents blue, ‘green’ represents green, ‘yellow’ represents yellow, ‘black’ represents black, and ‘white’ represents white.
  4. Color mapping: In MATLAB, there are some built-in color mapping functions that can map a single value to different colors. For example, the ‘jet’ function can map values to rainbow colors.

Here are some examples of shapes drawn using different colors.

% 使用颜色缩写
x = 1:10;
y = x.^2;
plot(x, y, 'r'); % 绘制红色曲线

% 使用RGB颜色
x = -pi:0.1:pi;
y = sin(x);
plot(x, y, 'Color', [0.5 0.5 0.5]); % 绘制灰色曲线

% 使用颜色名称
x = 0:0.1:2*pi;
y1 = sin(x);
y2 = cos(x);
plot(x, y1, 'color', 'blue'); % 绘制蓝色曲线
hold on
plot(x, y2, 'color', 'red'); % 绘制红色曲线
hold off

% 使用颜色映射
x = -1:0.1:1;
y = x.^2;
scatter(x, y, [], y, 'filled'); % 使用颜色映射绘制散点图
colorbar; % 显示颜色对应的数值

Based on the examples above, you can choose the appropriate color to draw the graphics as needed.

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