How does MATLAB read Excel files in batches (loops) and save data as .xlsx

Sometimes we need to read and process Excel files in a folder or multiple folders. So how to achieve it?

Take reading Excel files in a folder as an example.

File address: E:\Study of Lab\Coding\Experience DatePhoto\Excel

The method of batch reading excel under the file address is:

excel_path=  'E:\Study of Lab\Coding\Experience DatePhoto\Excel\';   %文件夹路径 
img_path_list = dir(strcat(excel_path,'*.xlsx'));          
%%dir('.')列出当前目录下所有子文件夹和文件%
img_num = length(img_path_list);
%文件的长度

Newexcel_path='E:\Study of Lab\Coding\Experience DatePhoto\diff2method\';
%若想对读取的Excel进行处理，新的excel存放地址

img_name =sort_nat({img_path_list.name});      %排序后的文件名

for i=1:img_num
    P_data(:,:,i) = xlsread([excel_path,num2str(i),'.xlsx']);
    diffdate = diff(P_data,2)  %以对数据进行2阶偏微分处理
end

The screenshot of the processing result part is: The

xlswrite() function is needed to save the data as an Excel file (.xlsx).

例如：
xlswrite(strcat(file_path,int2str(data1),’.xlsx’), xyz,‘A,K’);

Among them, strcat is Strings Catenate, which connects strings horizontally.

Role: connect multiple characters into a single string

strcat(file_path,int2str(data1): Store the Excel file with data1 as the naming rule in the file_path folder, such as 0.xlsx,1.xlsx,...,100.xlsx.

The content of the stored data is what xyz contains

The storage range of the Excel file is from A to K (column 1 to column 11)

If you want to process the read excel, you can also write the processing module in the above for loop.

for  ...
	...
	%处理模块
	...
end

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