NetLogo：从行数可变的输入文件中读取数据

Question

我一直在 NetLogo 中运行博弈论模拟，现在有很多数据文件，其中包含交叉表数据 - 每列存储不同变量的值，并且有 c.包含数据的 1000 行。我正在尝试编写一个程序来获取这些文件并计算每列的平均值。

我有一个程序，只要每个文件中有恒定数量的数据行，它就可以工作。该程序使用文件读取命令循环来计算运行总计，然后在读取所有行后除以读取的行数。

但是，我的真实数据文件的行数是可变的。我一直在尝试使用 file-at-end 修改我的代码？让它在最后一行之后退出正在运行的总循环，但我一直无法找到任何有效的使用它的方法 - 我只是收到一条错误消息，指出文件已结束。

请问有人可以建议一种处理这个问题的方法吗？我已粘贴下面的工作代码。

--

globals [target-file-name  
current-tally-file  
lines-read  
coops-fixed-run cheats-fixed-run either-fixed-run coop-freq-min-run  
coop-freq-max-run coop-freq-mean-run ticks-run  
num-lines  
]  

to setup  
set target-file-name user-input "Type a name for the target file"  
file-open target-file-name  
file-print("TallyFile Reps pFixCoop pFixCheat pFixEither MeanMinCoop MeanMaxCoop MeanMeanCoop")  
file-close  
set num-lines read-from-string user-input "How many lines in the file to be processed?" 
end 

to go  
set current-tally-file user-file  
file-open current-tally-file  
set lines-read 0  

while [lines-read < num-lines][  
let in1 file-read set coops-fixed-run (coops-fixed-run + in1)  
let in2 file-read set cheats-fixed-run (cheats-fixed-run + in2)  
let in3 file-read set either-fixed-run (either-fixed-run + in3)  
let in4 file-read set coop-freq-min-run (coop-freq-min-run + in4)  
let in5 file-read set coop-freq-max-run (coop-freq-max-run + in5)  
let in6 file-read set coop-freq-mean-run (coop-freq-mean-run + in6)  
let in7 file-read set ticks-run (ticks-run + in7)    
set lines-read (lines-read + 1)   
]  

stop-and-clear  
end  


to stop-and-clear  

let pfixcoop (coops-fixed-run / lines-read)  
let pfixcheat (cheats-fixed-run / lines-read)  
let pfixeither (either-fixed-run / lines-read)  
let mean-of-mins (coop-freq-min-run / lines-read)  
let mean-of-maxs (coop-freq-max-run / lines-read)  
let mean-of-means (coop-freq-mean-run / lines-read)  
let mean-of-ticks (ticks-run / lines-read)  

file-open target-file-name  
file-print (word current-tally-file " " lines-read " " pfixcoop " " pfixcheat "
" pfixeither " " mean-of-mins " " mean-of-maxs " " mean-of-means " "
mean-of-ticks)  
file-close  


set coops-fixed-run 0  
set cheats-fixed-run 0  
set either-fixed-run 0  
set coop-freq-min-run 0  
set coop-freq-max-run 0  
set coop-freq-mean-run 0  
set ticks-run 0  
set lines-read 0  

stop  

end  

Answer 1

从文件中读取所有行的方法如下所示：

to read-file [filename]
  file-open filename
  while [not file-at-end?][
    ;read one line
    let in1 file-read
    let in2 file-read
    ;and so one, at the end you will probably want to put these into some global variable
    set global-in1 fput in1 global-in1
  ]
  file-close filename
end

这假设所有行都具有确切的数据项名称编号，并且您知道该编号是多少。否则只需使用 file-read-line 而不是 file-read