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Is it possible to read a file line by line and then break each line into individual characters/numbers for further processing?

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If I have a file with the folliwing contents:
a file.dat
a
n pqr 3 2
1 -3 0
2 3 -1 0
Then is it possible to extract the numbers like 3 and 2 when I read the first line? Also, breaking the string in the set of numbers that are separated by spaces except for the pqr. The lines with numbers will be terminated always by '0'. So I would need to get the following result
k = 3
m = 2
j1 = [1 -3]
j2 = [2 3 -1] as the matrix.
Rest all characters are not needed to be read.

Respuesta aceptada

Ameer Hamza
Ameer Hamza el 3 de Nov. de 2020
Editada: Ameer Hamza el 3 de Nov. de 2020
If the txt file follow the same format then try the following code
data = strsplit(fileread('data.txt'), newline);
mn = textscan(data{3}, '%s %s %f %f');
m = mn{3};
n = mn{4};
j1 = sscanf(data{4}, '%f');
j1(end) = [];
j2 = sscanf(data{5}, '%f');
j2(end) = [];
data.txt is attached.

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