matlab画概率密度分布图

为了在Matlab中画概率密度分布图，可以使用`hist`函数计算数据的频率分布，并使用`bar`函数画出直方图。然后，使用`normfit`函数来计算数据的正态分布参数，包括均值和标准差。接下来，使用`pdf`函数来画已知分布的概率密度曲线。下面是一个示例代码：

clc; clear; 

data = randn(1000, 1);
[counts, centers = hist(data, 7);
figure
bar(centers, counts / sum(counts))

[mu, sigma = normfit(data);
x1 = -4:0.1:4;
y1 = pdf('Normal', x1, mu, sigma);
hold on
plot(x1, y1)

上述代码会生成一个包含数据直方图和正态分布概率密度曲线的图形。<em>1</em><em>2</em><em>3</em>
#### 引用[.reference_title]
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