Question

我有一组名称为.txt的文件： table.iterations.txt其中iterations = 1:10000（table.01.txt，table.02.txt，table.1001.txt等，每个文件大小低于2kb）。每个txt文件包含不同行中的值，不带小数的整数p.e。：

table.01.txt  table.02.txt ... table.1001.txt
 2              5               32
 5             19               37
19             45               58
52             88               62 
62             89               75
95                              80
99                              88
                               100

每个txt文件可以包含不同数量的值，其中0<value<101。

我需要帮助，了解如何读取所有这些文件以查找所有txt文件中其值的出现百分比。在上面的粗略例子中，值2出现一次，值5出现两次，值100出现一次等。

提前谢谢。

Answer 1

来自评论，根据this post：

dirName = 'C:\yourpath';                           %# folder path
files = dir( fullfile(dirName,'table.*.txt') );    %# list all *.txt files, make sure you have only the txt's you are interested on inside selected path
files = {files.name}';                             %# file names
data = cell(numel(files),1);                       %# store file contents
for i=1:numel(files)  
    fname = fullfile(dirName,files{i});            %# full path to file
    values{i}=load(fname);                         %# load values from txt to variable
    data{i} = histc(values{i},1:100);              %# find occurences, for max value =25 change 100 to 25
end

thestructdata=[data{:}];                           %# convert to matrix
for j2=1:size(thestructdata,1)
    occ(j2,:)=histc(thestructdata(j2,:),1);        %# find the number of occurence, 1 is present, on each line on all txt files 
end
occ=[occ]';                                        %# gather results to an array
occperce=occ(1,:)./numel(files)*100                %# results in percentage, max value = 25, change to 100 if needed as the OP question

结果（25值的最大值）：

occ =    
    14    11    10    12    13    15    11    10    11    10     7    14    11    12    11    13     7    11    10    12    14    12    13    14    11


occperce =

  Columns 1 through 20

   56.0000   44.0000   40.0000   48.0000   52.0000   60.0000   44.0000   40.0000   44.0000   40.0000   28.0000   56.0000   44.0000   48.0000   44.0000   52.0000   28.0000   44.0000   40.0000   48.0000

  Columns 21 through 25

   56.0000   48.0000   52.0000   56.0000   44.0000

如果您愿意，可以删除所有这样做的txt文件：delete(dirName,'table.*.txt');

Matlab：从文本文件中读取和计算出现值的百分比

1 个答案: