The code has multiple issues that need to be fixed. Here a a couple of things to improve:
- The fopen documentation states that fid is an integer file identifier .... The variable fid does not contain the file data, it is merely a reference to an open file. And it is also a scalar value. Therefore your attempt to index into fid as if it were a data array doesn't make any sense.
- Over-complicated method of reading a text file: first textscan, then cellfun calling textscan again, all just to avoid some header lines? Instead you should read textscan 's documentation, and use the HeaderLines option, like this:
fid = fopen('filename.txt', 'r');
data = textscan(fid, '%f', 'delimiter','\t', 'HeaderLines',20);
fclose(fid)
I also removed the CollectOutput option, as this is superfluous if there is only one format specifier. For the same reason the delimiter doesn't really make sense either. If you have multiple values per line, then you need to specify them in the formatSpec: there are plenty of examples in the documentation.
Starting in R2018b, you can use the “rmmissing” function to remove “NaN” values from an array. For example, consider the following:
A = [1,NaN,2];
B = rmmissing(A)
The result is the vector “B = [1 2]”.
In R2018a and earlier, use the “isnan” function:
A = [1,NaN,2];
B = A(~isnan(A))
