plt.scatter函数中的alpha

plt.scatter函数中的alpha参数是用来设置点的透明度的。通过调整alpha参数的值，可以使点的颜色更加透明或者更加鲜艳。在提供的代码中，alpha参数被设置为1，表示点的颜色是完全不透明的。如果将alpha参数设置为0，则表示点是完全透明的，而设置为介于0和1之间的值，则表示点的透明度介于完全透明和完全不透明之间。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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