如何在bash中生成0到1之间的随机数(How to generate random numbers between 0 and 1 in bash)

如何在bash中生成0到1之间的随机数(How to generate random numbers between 0 and 1 in bash)

我试图在下面的bash命令中推断如何生成两个随机数作为readproportion参数的输入值， readproportion以这些参数的总和应该等于1的方式。

$ ./bin/ycsb run basic -P workloads/workloada -p readproportion=0.50 -p updateproportion=0.50

请帮助您的建议。

谢谢

I'm trying to infer how to generate two random numbers as input values for parameters of readproportion, updateproportion in a way that sum of these parameters should equal 1, in the following bash command.

$ ./bin/ycsb run basic -P workloads/workloada -p readproportion=0.50 -p updateproportion=0.50

Please help with your suggestions.

Thanks

最满意答案

据我所知，$ {RANDOM}在0到32767的间隔内生成整数。所以，我想，你可能想尝试这样的东西来生成[0,1]中的随机值：

bc -l <<< "scale=4 ; ${RANDOM}/32767"

As far as I can remember ${RANDOM} generates integers in the interval 0 - 32767. So, I guess, you might want to try something like this to generate random values in [0,1]:

bc -l <<< "scale=4 ; ${RANDOM}/32767"