$$\begin{array}{l}m=\mathrm{经验}（（\mu +{\sigma }^2/2）\\ v=\mathrm{经验}（（2\mu +{\sigma }^2）（（\mathrm{经验}（（{\sigma }^2）-1）\end{array}$$

$$\begin{array}{l}\mu =\mathrm{日志}（（m^2/\sqrt{v+m^2}）\\ \sigma =\sqrt{\mathrm{日志}（（v/m^2+1）}\end{array}$$

M = 1;v = 2;mu = log（（M^2）/sqrt（v+m^2））;sigma = sqrt（log（v/（m^2）+1））;[m，v] = lognstat（mu，sigma）m = 1 v = 2.0000 x = lognrnd（mu，sigma，1,1e6）;mx =平均值（x）mx = 0.9974 vx = var（x）vx = 1.9776