Matlab function for reading formatted data.
textscan is a Matlab function for reading formatted data from text file or string.
For more details, see the Matlab's official doc.
Questions tagged [textscan]
222 questions
2
votes
2 answers
conversion of cell to matrix that contains text?
I have the text file that contains measurement data, the header is not that important so I used this to remove the first 25 lines
% Skip the first 25 lines
for i=1:25
fgetl(inputfile);
end
Then I used delimiter in order to get the data
…
mecaeng
- 93
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2
votes
1 answer
import data from a text file in MATLAB with multiple delimiters
I try to import data from a text file to MATLAB, which has the following structure:
** Porosity
**
*POR *ALL
0.1500 0.0900 2*0.1300 0.1400 4*0.1500 0.2200 2*0.1500 0.0500
0.0900 0.1400 5*0.1500 0.2300 0.2600 0.0800 0.1500 0.1500 0.2400…
Daniel Düsentrieb
- 23
- 4
2
votes
1 answer
how to find negative and positive number from a string?
I've a set of chemical reactions, and I need to read only the first number of each chemical. For example, I've a string as
reaction = '-1.0CdCl2(aq) 1.0Cd++ 2.0Cl-';
I want the find -1.0 of CdCl2(aq), 1.0 of Cd++, and 2.0 of Cl-.
imransydney
- 65
- 1
- 6
2
votes
2 answers
Decimating large data files from disk in MATLAB?
I have very large data files (typically 30Gb to 60Gb) in .txt format. I want to find a way to to automatically decimate the files without importing them to memory first.
My .txt files consist of two columns of data, this is an example…
James Archer
- 421
- 2
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2
votes
2 answers
Detect number of columns in a columnar text file
I am trying to interpret data from an eye tracking device. The files exported from the eye tracker are in ASCII format.
Recording files that contain data from a single eye only look like this (only four rows shown):
6372825 645.3 275.4 1362.0…
CaptainProg
- 5,610
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2
votes
2 answers
Cannot import all values at once in Matlab using TextScan
I have a dataset of 1911518 values. I have used the textscan function. But the function returns only 1424458 values. I again created a new variable to get the remaining values but this time it gave me around 9000 values. Does anyone know what the…
user2848498
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2
votes
1 answer
textscan strange behaviour in matlab
I have a code that i'm trying to run in matlab, it gives an error in textscan function
as it can't split a string on a delimiter, although i'm sure the code works on other versions of matlab (on other computer)
>> a='ahmed;mohamed'
a…
Ahmed Kotb
- 6,269
- 6
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- 52
2
votes
1 answer
Matlab textscan with fixed width
I have to read a file like this
10001 3 5.0000 30.0 0.0000 25.6 0.0000 10.0
10002 1 25.0000 0.0000 4.6887 58.2
10003 5 45.0000 20.0 …
Michele Redaelli
- 31
- 4
2
votes
1 answer
MATLAB textscan headerlines
When I try to use headerlines with textscan to skip the first line of the text file, all of my data cells are stored as empty.
fid = fopen('RYGB.txt');
A = textscan(fid, '%s %s %s %f', 'HeaderLines', '1');
fclose(fid);
This code gives
1x4 Cell
[]…
Mark Hughes
- 245
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2
votes
1 answer
how to concatenate disparate values loaded by textscan()?
I am loading some text with textscan, and although the data comes through, I would like to convert that data into a matrix of floats instead of the hh:mm:ss format.
Here is an example of the data:
2010/01/01,00:00:00.979131, 27.4485, 51.9362,…
jml
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2
votes
2 answers
How to separate float with string that are togetter written - matlab
I have a question regarding to read a txt file in matlab were the format is not know , but each row in the txt file always start like this:
2012-11-01 00:00:00.00 XX YY 00.000s
Then some different stuff is logged and the txt file can look…
user1564762
- 745
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2
votes
1 answer
Matlab textscan gone wrong: cellfun to select data from certain lines
Hi I am using the following code to read some values from lines containing 'GPGGA' from data.txt
fid = fopen('D:\data.txt','r');
A=textscan(fid,'%s %*s %f %s %f %s %*s %*s %*s %*s %*s %*s %*s %*s %*s,'Delimiter',',');
fclose(fid);
Loc = [A{[2,…
user1658248
- 25
- 4
2
votes
2 answers
Cutting off textscan after a character
I'm working on a function in MATLAB that reads input from a file. So far (after reading a bit here about scanf vulnerabilities) I decided to use fgets to get each line, and then textscan to extract the words, which will always be of the format…
Andrew
- 1,839
- 14
- 25
1
vote
1 answer
Importing data without headers and rearranging column data
I have a 100 .dat files like the one in the left hand pane, which I need to import without headers and then sort rows.
ANSWER for doing it manually, file by file:
data=sortrows(data,2); #sort all columns of data via the 2nd…
HCAI
- 2,213
- 8
- 33
- 65
1
vote
2 answers
Average of values from a column/ Skip lines (textscan)
I have a .txt file which looks like this:
******text*******
(30 lines containing text and *)
******text*******
a b c
a b c
a b c
a b c
a b c
a b c
a b c
(I'm creating a plot with a as x and b and c as y1 and y2)
How do I skip those 30 lines with…
Dywabo
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