1 >> exist plot
2 
3 ans =
4 
5      5

 1 using System;
 2 using System.Text ;
 3 using System.IO ;
 4 
 5 namespace FunctionNameProcess
 6 {
 7     class Program
 8     {
 9         public static void Main(string[] args)
10         {
11             string fileName = @"funcname.txt" ;
12             string saveName = @"result.txt";
13             TextWriter tw = new StreamWriter (saveName ,false );
14             using (TextReader tr = new StreamReader (fileName ))
15             {
16                 string temp ;
17                 while ((temp = tr.ReadLine ())!=null )
18                 {
19                     tw.WriteLine (GetBulidInFunction (temp ));
20                 }                                
21             }            
22             tw.Close ();
23             Console.Write("Press any key to continue . . . ");
24             Console.ReadKey(true);
25         }
26         
27         public static string GetBulidInFunction(string name)
28         {
29             if (name !="") {
30                 string[] names = name.Split ('\t');
31                 if (names!=null && names [0]!= "") {
32                     return names [0];
33                 }
34             }    
35             return "";            
36         }
37     }
38 }

 1 %导入数据后是cell类型的数据类型
 2 %要进行转换为字符串数组然后调用exist函数进行计算
 3 %最终结果也应该是字符串数组，需要声明，添加过程中类型不一样会有错误
 4 clc;clear;
 5 newData = importdata('result.txt');
 6 vars = fieldnames(newData);
 7 for i = 1:length(vars)
 8     assignin('base', vars{i}, newData.(vars{i}));%在命名空间声明变量
 9 end
10 result = {};%声明一个空的cell数组类型
11 for i = 1:size(textdata,1)
12     temp =cell2mat(textdata(i,1));
13     resultNo = exist(temp);
14     if resultNo == 5 %返回5说明为内置函数
15         len = size(result,1);
16         result(len+1,1) = mat2cell(temp);
17     end
18 end