Cant get headerlines to work

1 Ansicht (letzte 30 Tage)
Cio
Cio am 21 Okt. 2014
Kommentiert: Star Strider am 21 Okt. 2014
Hi guys, I've recently bought Matlab and i dont know a great deal so bear with me. So i want to input data into matlab from
'http://jsoc.stanford.edu/SUM20/D358012442/S00000/Uy/1909:105.0_00.0W00.0N.Uy'
i use
urlread('http://jsoc.stanford.edu/SUM20/D358012442/S00000/Uy/1909:105.0_00.0W00.0N.Uy')
which gives me the data i need but i cant get it to ignore the first 7 lines of text.
I have been trying by textread('ans','headerlines', 7) which doesnt work.
If i select the data manually after putting in the urlread, and putting [..] around the data i want, it does give me what i want which comes up as '31x9 double' in workspace, instead of '1x2881 char'.
Can i get the data to be plotted in '31x9 double' directly from the website without me copy and pasting it, theres a lot of data so im looking for the shortest way. My explanation is terrible, i hope someone gets it, Any help is appreciated. Thanks in advance.

Melden Sie sich an, um diese Frage zu beantworten.

Akzeptierte Antwort

Star Strider
Star Strider am 21 Okt. 2014
Use urlwrite instead.
This works:
File = urlwrite('http://jsoc.stanford.edu/SUM20/D358012442/S00000/Uy/1909:105.0_00.0W00.0N.Uy','Stanford_Data.txt');
fidi = fopen(File);
D = textscan(fidi, repmat('%f',1,9), 'Delimiter','\n', 'HeaderLines',7);
Dd = cell2mat(D);
  2 Kommentare
Cio
Cio am 21 Okt. 2014
thank you, that did work, you are a scholar and a gentleman
Star Strider
Star Strider am 21 Okt. 2014
My pleasure!
I do my best to be both!

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (1)

Geoff Hayes
Geoff Hayes am 21 Okt. 2014
Cio - as you noted, the result of the urlread is a 1x2881 character array. To convert it to a matrix, you could just look for all occurrences within the string of the new line feed character whose ASCII decimal value is 10. You could then split all strings on this "delimiter" and get the 31x9 matrix as
resultStrAsArray = ...
urlread('http://jsoc.stanford.edu/SUM20/D358012442/S00000/Uy/1909:105.0_00.0W00.0N.Uy');
resultAsMatrix = char(strsplit(resultStrAsArray,char(10))');
% now remove the first seven rows
resultAsMatrix = resultAsMatrix(8:end,:);
Try the above and see what happens! Note that it may not work in all cases due to the assumption that the new line feed character (10) can be used to break the string array into multiple strings.
  1 Kommentar
Cio
Cio am 21 Okt. 2014
that did not come up right, and i have no idea why but i did find a solution, I thank you for your kindness

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Get Started with MATLAB finden Sie in Help Center und File Exchange

Tags

Community Treasure Hunt

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

Start Hunting!

Translated by