Struggling with multiple csv files

Question

Brendan Rapp 2023-5-31

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1976184-struggling-with-multiple-csv-files

编辑： Stephen23 2023-5-31

Hello everyone,

I am new to working with reading files in matlab. So, my automated testing generated multiple files like "... rpm_Variation1", "... rpm_Variation2" and so on. Now I came up with the following code:

clear all; 
close all;
clc
%%First part just to test if it works
file = 'C:\Users\Brendan\OneDrive\Masterarbeit_prädiktive_Stromregler\Modelle\01_Parameter\01_Ld\rpm\01_Ld_FCS_MPCCC_rpm_Variation1.csv';
A = readmatrix(file);
x = num2cell(A, 1)
t = x{1}
%%Second part for reading in multiple files
Drpm = 'C:\Users\Brendan\OneDrive\Masterarbeit_prädiktive_Stromregler\Modelle\01_Parameter\01_Ld\rpm';
files = dir (fullfile(Drpm, '*.csv'));
for i = 1:length('files')
       datarpm = readmatrix(files(i).name);
end

The code above gave me following errors:

Error using readmatrix (line 158)

Unable to find or open '01_Ld_FCS_MPCCC_rpm_Variation1.csv'. Check the path and filename or file permissions.

Error in Variation_Ld (line 31) datarpm = readmatrix(files(i).name);

Unfortunately, I don't have an idea how to correct these errors. Does anyone have an idea?

Thank you in advance!

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Answer 1

Stephen23 2023-5-31

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1976184-struggling-with-multiple-csv-files#answer_1247634

编辑：Stephen23 2023-5-31

在 MATLAB Online 中打开

"I don't have an idea how to correct these errors. Does anyone have an idea?"

The error message already tells you how: "Check the path and filename or file permissions."

You told DIR, but forgot to tell READMATRIX to look in the correct location.

Drpm = 'C:\Users\Brendan\OneDrive\Masterarbeit_prädiktive_Stromregler\Modelle\01_Parameter\01_Ld\rpm';
files = dir(fullfile(Drpm, '*.csv'));
for i = 1:numel(files) % fixed bug
    fnm = fullfile(Drpm,files(i).name); % added
    datarpm = readmatrix(fnm); % modified
end