MATLAB: Easiest way to skip a few lines and then read data from this text file ( x and y) to draw a plot.

MATLAB

I have attached the file I'm trying to do this for.

Thanks a lot!

Best Answer

The easiest way I can think of is to use the dlmread function:

filename = '6in_nomass_5.txt';
Data = dlmread(filename, '\t', 6, 0);

There are others, such as readmatrix that are likely even easier, however you did not state the release you are using, so dlmread is a safe option.

EDIT — To draw the plot:

figure
plot(Data(:,1), Data(:,2))
grid

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MATLAB: Read and manipulate multiple .csv files

You can use dir to read the name of all files with csv extensions.

files = dir('*.csv');

Then iterate over the files struct to read each file.

for i=1:length(files)
    data = readmatrix(files(i).name); % or csvread(files(i).name)
    % process data
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MATLAB: Importdata skips the last few rows

That's odd... Confirmed in my own 2012a.

It appears to be trimming all the entirely NaN rows from the end of your data.

I replaced line 348 with line 349, and confirmed the result is 347 rows long. Then I set the first element in line 360 to a non-nan value, and the result was 360 rows long.

I think this is stupid behaviour to have in a function, but nevermind.

Given that the files were created with save, you should do this instead:

data = load('file.txt', '-ASCII');

Best Answer

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MATLAB: Read and manipulate multiple .csv files

MATLAB: Importdata skips the last few rows

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