在循环中创建结构

Question

我有几个文件夹。在每个文件夹中有 1 个名为 Data 的文件。每个文件都有结构，其中之一是 Data.ensemble。我从这个结构中提取温度（第 9 列，参见问题）。我现在的问题是在我的循环中，每次迭代都在结构中提取和保存这个温度。例如，如果我有 10 个文件夹和 10 个文件。我要

Temperature.1=[12 15 10...]
Temperature.2=[20 30 11...]
...
Temperature.10=[15 26 27...]

而且这些都是不同的尺寸。提取工作正常，保存它是一个问题。我在 https://nl.mathworks.com/matlabcentral/answers/304405-create-a-struct-iteratively

的帮助下尝试了以下代码

folders =struct2cell(dir(Pathfolders)); %Pathfolders is the path to the folders
NaamFolders=string(char(folders(1,:))); %make a list of all the foldernames
lenNF=length(NaamFolders);

for i = 1:lenNF
    Map=char(NaamFolders(i,1)); % Give me the name of the first , second, ... folder
    Pathfiles=[Path,'\',Map,'\','*_new.mat']; %Make the path to the files that end with _new.mat (in my case only 1)
    files =struct2cell(dir(Pathfiles)); %Select all files that end with _new.mat (in my case only 1)
    NaamFiles=char(files(1,:)); % Make a list of the names of all those files (in my case only 1)
    FilePath=[Path,'\',Map,'\',NaamFiles]; %create path to that 1 file
    Data=load(FilePath); %load that file
    [lenData,lenvariables]=size(Data.ensemble) % determine the size of the file structure called ensemble
    idx=NaamFolders{i} %Select the name you want to call your structure in the variable you want to create
    index = ismember(Data.ensemble(:,8),[10,20,30]) & Data.ensemble(:,5) == 12; %determine the index where  column 5 == 12 and column 8 == 10 or 20 or 30
    RightData   = Data.ensemble(index,:) % this the data where the previous comment is true
    Temperature.idx=RightData(:,9) % this line does not work. For every iteration, create a new structure within temperature that extracts column 9 from RightData.

end

是最后一行不起作用，报错

Unable to perform assignment because dot indexing is not supported for variables of this type.
Error in ExtractTrajectory (line 36)
    Temperature.idx=RightData(:,9)

Answer 1

变量名应始终以字母[=72=].

开头
space,数 , 不允许使用 ~, #, % 等特殊字符。

Check NaamFolders format or print its format for us.

如果它以数字开头，您可以做的只是将给定的字母添加到所有 NaamFolders 列表元素中，如下所示

NaamFolders = strcat('z',NaamFolders)

结构字段格式要求

案例 1: 以 字母开头

>> isvarname("folder1") ans = logical 1

可与点分配一起使用

>> check.("folder1") = 5 check = struct with fields: folder1: 5

案例 2： 从 number
开始
>> isvarname("1folder") ans = logical 0

不能与点分配一起使用

>> check.("1folder") = 5 Invalid field name: '1folder'.

案例 3：从 space
开始
>> isvarname(" folder") ans = logical 0

不能与点分配一起使用

>> check.(" folder") = 5 Invalid field name: ' folder'.

案例 4：以特殊字符
开头
>> isvarname("#folder") ans = logical 0

不能与点分配一起使用

>> check.("#folder") = 5 Invalid field name: '#folder'.

在循环中创建结构

Create a structure in loop

matlab

loops

structure

结构字段格式要求