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如何在缺少列时告诉 JMP 继续运行脚本

嗨 - 在下面创建汇总表时，有没有人知道如何在 JSL 中编码以允许脚本在下面的任何一列不存在时继续运行？

 

dt3 << 总结（总和（：失败，：未评估，：弱））；

 

谢谢！

数据表脚本编写回复：如何在缺少列时告诉 JMP 继续运行脚本

您需要对要汇总的列列表进行一些代码安全保护。

 

这是我的例子：

 

dt3 = Current Data Table();
columns to summarize = {"fail", "not assessed", "weak"}; //columns you're interestd in, may or may not exist within table
column names = dt3 << Get Column Names( "String" );  //we need to grab the table columns to utilize only available columns
columns as names = {};      //we need to wrap both column names and our columns of interest in 
For( i = 1, i <= N Items( column names ), i++,   //  'As Name( ... )' to avoid issues with capitalization and such
 columns as names[i] = As Name( column names[i] ) //  loop here
);

columns to summarize within table = {};
For( i = 1, i <= N Items( columns to summarize ), i++,
 If( Contains( columns as names, As Name( columns to summarize[i] ) ), // check to see that name exists as column header
  Insert Into( columns to summarize within table, columns to summarize[i] )
 )
);
Eval( Eval Expr(
 dt3 << Summary( Expr( Substitute( columns to summarize within table, {}, Expr( Sum ) ) ) ) //fancy substitution for the summary table
) )