Why doesn't csvread read properly?

Hello,

I'm using csvread() to read my stored data from oscilloscope. Original file is 5000 rows long, but when I read .csv file it only reads to half of the file and every second value is 0. In the end vector is still 5000 row long but it's only half of the original. Why it does that and should I rather use textscan()?

[Stephen23]

>> M = csvread('U_I_MS.csv');
>> size(M)
ans =
   5001      3
>> M(1:5,:)
ans =
    0.00000    0.00000    0.00000
    0.00000    6.00313   60.00390
    0.00048   55.20310   20.50390
    0.00096   65.60310   29.00390
    0.00144   25.60310    2.50391

Two questions:

1. What version of MATLAB are you using?
2. Why does the CSV file have semicolons at the end of each line?

[Niko]

I'm using Matlab R2015a. Where do you see semicolons at the and of each line?

[Stephen23]

@Niko: a CSV file is a text file, so I opened it using Notepad++. How do you look at a text file?

Answer 1

[Jan]

I cannot imagine why your CSVREAD does not work. Perhaps you are reading the wrong file? The 2 semicolons at the end of the line are not nice, but the import should work inspite of this. Nevertheless, it is easy to import the file manually:

fid = fopen(FileName, 'r');
if fid == -1, error('Cannoten read file: %s', FileName); end
fgetl(fid);  % Skip first line
Data = fscanf(fid, '%g, %g, %g ;;', [3, inf]).';
fclose(fid);

Answer 2

[Kaelasha Tyler]

I have had exactly the same problem as Niko. While it is possible to manually import the file as Jan says, it would be nice to know why the csvread command is not working as it should, and what to do about it. Any further suggestions, much appreciated.