以 csv 格式保存 .mat 文件

Question

我有一个.mat文件，数据结构如下。

数据 =

带有字段的结构：

        axis1: [25626600×1 double]
        axis2: [25626600×1 double]
        axis3: [25626600×1 double]
      datenum: [25626600×1 double]
  sample_rate: 30
serial_number: 'MOS2D10171145'

我希望将此 .mat 文件另存为 csv 文件。

我尝试了这段代码，但它给了我这个错误。

csvwrite('FileName.csv', Data);

Undefined function 'real' for input arguments of type 'struct'.

Error in dlmwrite (line 189)
                    str = sprintf('%.*g%+.*gi',precn,real(m(i,j)),precn,imag(m(i,j)));

Error in csvwrite (line 42)
dlmwrite(filename, m, ',', r, c);

Answer 1

正如 Wolfie 所解释的，您不能直接执行此操作，因为您的 sample_rate 和 serial_number 变量无法在 CSV 中直接执行。

解决方案是将这 2 个变量放在 CSV 文件名中以保留它们。

%% Parameters
cdSAVE='YOUR_PATH'; % PUT YOUR SAVING PATH

%% Variables (put your own)
axis1 = zeros(250,1);
axis2 = zeros(250,1)+1;
axis3 = zeros(250,1)+2;
datenum = zeros(250,1)+3;
sample_rate = 30;
serial_number = 'SERIAL_NUMBER';

%% Make a matrix with what you can
Matrix = zeros(length(axis1),4);
Matrix(:,1)=axis1;
Matrix(:,2)=axis2;
Matrix(:,3)=axis3;
Matrix(:,4)=datenum;

%% Convert to table (to have the headers written in your csv file)
T = array2table(Matrix);
T.Properties.VariableNames(1:4) = {'axis1','axis2','axis3','datenum'};

%% Create a the filename with the 2 other datas
fileName = char(strcat('Extract_CSV_Sample_rate_',string(sample_rate),'_Serial_Number_',serial_number,'.csv'));

%% Writing
fullPathFileName=char(strcat(cdSAVE,"\",fileName));

%% Choose what you want :

%% Here for just the matrix with csvwrite
csvwrite(fullPathFileName,Matrix);

%% Here with headers also with writetable
writetable(T,fullPathFileName)

CSV 名称将是：Extract_CSV_Sample_rate_30_Serial_Number_SERIAL_NUMBER.csv