Skipping lines in text file

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Muhsin 2017-10-12

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评论： Guillaume 2017-10-13

Hello, I have a text file called Acc that has two columns of data. The first has text and i want it to skipped. Can anyone help me solve it. I am a new user.

Here is how I load the data;

load 'Acc.txt';
time = Acc(:,1); 
Acc_x = Acc(:,2);

Thank you

Muhsin

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Guillaume 2017-10-12

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Most likely, you could read the file very simply with:

t = readtable('Acc.txt');

which, if the first line is a header, should parse the header correctly and name the columns correctly. if that doesn't work you can always tell readtable to skip the first line:

t = readtable('Acc.txt', 'HeaderLines', 1);

Note that reading a file as a table is much better than popping variables with unpredictable names in your workspace.

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Muhsin 2017-10-13

The code still gives me one column in workspace :(

Guillaume 2017-10-13

在 MATLAB Online 中打开

No, the code gives you one table, acc, with two columns. As I said:

"Use acc.Time to get the time column and acc.Acc_x to get the acceleration column."

By the way, there's a lot of empty lines in your text file that matlab interpret as NaNs. To remove this invalid entries

acc = rmmissing(acc);

You can clearly see that acc is a table with two columns (variables):

>> summary(acc)
Variables:
    Time: 1400×1 double
        Values:
            Min        0.01 
            Median    7.005 
            Max          14 
    Acc_x: 1400×1 double
        Values:
            Min         -0.22004
            Median    -0.0058509
            Max          0.20067