How can I read a specified, comma seperated text (txt) file line-byline?

2 visualizaciones (últimos 30 días)
I need to just read the 3 following numerical value from a text file using sscanf line by line:
0.3616813421 V,0 counts,500 ms
0.3567937374 V,0 counts,500 ms
0.3616813421 V,0 counts,500 ms
0.3616813421 V,0 counts,500 ms
0.3665689229 V,0 counts,500 ms
.
So far i have:
fileID=fopen('data.txt','rt');
line=fgetl(fileID);
a = fscanf('line','%s %s %s');
But this doesnt seem to work and im unsure as what to do.

Respuesta aceptada

JohnGalt
JohnGalt el 19 de Mayo de 2016
Now, you say that you'd like the 3 numerical values which can be obtained by:
fileID=fopen('data.txt','r'); % I've removed the 't'
while feof(fileID)~=1
line=fgetl(fileID); % as per OP
a = cell2mat((textscan(line,'%f V,%f counts,%f ms'))); % a is a 3x1 matrix
display(a)
% do something with 'a'
end
fclose(fileID);
However, if you wanted to read the file in one go... you could use:
fileID=fopen('data.txt','r'); % I've removed the 't'
a = cell2mat(textscan(fileID,'%f V,%f counts,%f ms'));
fclose(fileID);
display(a)
There are further improvements that can be made to this code (checking that the file opens correctly, using more appropriate data types etc etc) but this should achieve what you intend.

Más respuestas (0)

Categorías

Más información sobre Characters and Strings en Help Center y File Exchange.

Etiquetas

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by