如何使用gnuplot和awk同时迭代日志文件列表

I am using awk and gnuplot to extract some running times and their averages that are number of processes-dependent from a series of log files named bt.B.*.log where * can be 1, 4, 9 and 16 (those are the number of processes).I am using awk and gnuplot to extract some runn