在看WGCNA的時候看到的一個術語。
先來看一個隨機網絡:沒有中心節點,大部分節點都均勻的連在一起。
再看一下scale free network:大部分的連接都集中在少數的中心
如何檢驗一個網絡是否是scale free network?
A. Log-log plot of whole-network connectivity distribution. The x-axis shows the logarithm of whole network connectivity, y-axis the logarithm of the corresponding frequency distribution. On this plot the distribution approximately follows a straight line, which is referred to as approximately scale-free topology.
whole network connectivity vs. corresponding frequency distribution
如果這個是一個正態分布,那么我們的網絡就是隨機網絡。
看兩篇文章:
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