How to read .XY file?

Question

Mateusz Kiersnowski 2022-7-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1767845-how-to-read-xy-file

评论： Mateusz Kiersnowski 2022-7-27

random_x.txt

i've got a file with ext .xy that i want to read, cant attached it here as it is not supported here. it looks liek that:

7004825,RMS:30.78,No:1082.

20.00000000,2.60350425E-02

25.00000000,4.05571833E-02

30.00000000,5.82764596E-02

35.00000000,7.92009458E-02

40.00000000,1.03343524E-01

45.00000000,1.30721480E-01

50.00000000,1.61356464E-01

55.00000000,1.61643982E-01

60.00000000,1.61960006E-01

65.00000000,1.62304759E-01

after that there is a one empty line and it repeats with diffrent numbers.

i want to read 1st line with info and then read 2 columns.

how do i do that? ive tried using this:

fid = fopen(file);
Unrecognized function or variable 'random_x'.
C = textscan(fid, '%s %s %s %d %d', 'HeaderLines',1,'Delimiter',',','EmptyValue',0);
fclose(fid);
Hz = C{4};
disp(Hz)
y = C{5};
disp(y)

but it will read the 1st line with columns and i dont want that.

i need to work with .xy files, but for help i manually converted it and attached.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Chunru 2022-7-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1767845-how-to-read-xy-file#answer_1015040

编辑：Chunru 2022-7-26

在 MATLAB Online 中打开

random_x.txt

file='random_x.txt';
fid = fopen(file, 'rt');
i=1;
s1 = '';
while ~feof(fid)   
    s{i} = [s1 fgetl(fid)];             % 1st line
    [xy{i}, n] = fscanf(fid, '%f, %f', inf);       % xy
    
    if mod(n, 2)==1
        s1 = [num2str(xy{i}(end)) ','];
    end
    
    xy{i} = reshape(xy{i}(1:floor(n/2)*2), 2, []);
    i = i+1;
end
fclose(fid);
s
s = 1×4 cell array
    {'7004825,RMS:30.78,No:1082.'}    {'17197987,RMS:81.89,No:916.7'}    {'4104402,RMS:42.36,No:799.4'}    {'1118378,RMS:51.75,No:554.2'}
xy
xy = 1×4 cell array
    {2×825 double}    {2×825 double}    {2×796 double}    {2×796 double}