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Load A File In Matlab3/15/2021
Examples collapse all Search File for Text Open Live Script Read a file and search it for text of interest.See Also fgetl fgets fread fscanf importdata textscan type Introduced before R2006a.Other MathWorks country sites are not optimized for visits from your location.Heres an example: Read in a standard MATLAB gray scale demo image.
Try: fid fopen( file.txt ); data textscan(fid, (f,f), collectoutput, true); fclose(fid); data data1. By continuing to use this website, you consent to our use of cookies. Load A File In Matlab How To Change YourPlease see our Privacy Policy to learn more about cookies and how to change your settings. Unfortunately, when I use the formatspec and your code, it returns one row of empty cells (there should be 2048 rows and 4 columns). Heres a example: For 30 text files, the resulting matrix would thus have 30 columns and as many rows as the files contain (specifically, theyd all have 2048 rows). But heres the catch, theres a multi-lines header (something like 8 lines of header) before the data and the data is separated by a semicolon. Also, the names of the text files do NOT follow a certain pattern and they are quite random. Ive already asked a very similar question here, but I wasnt considering the header. One helpful guy wrote the script below and Id like to tweek it a little bit to include the right parameters for the textscan(). ![]() NOTE: If youre file has a text header, missing data, or uses non white-space delimiters, you should check out the documentation for textread to determine which options to use. If you are using textread, see the param table in Description (link) and use the relevant name-value pair arguments to skip the header lines, define the delimiter, and anything else your files require. Note that the textscan function with this line: data textscan(filepathsi, ); is going to attempt to parse the file name you provided it, similar to the documentation section in Read Floating-Point Numbers (link). ![]() Remember to close it with fclose after you read it.). As noted the delimiter is a semicolon so whats the problem with data textscan(filepathsi,, headerlines,8, delimiter,; ); Seems pretty straightforward. If there arent always the same number of header lines, then you may have a more difficult issue, but detectImportOptions will parse a file as regular as this easily and then you can use readtable instead or importdata will likely have no issues at an even simpler interface. The question of how the files are named is something else entirely -- youll have to have some way to either build a wildcard string that matches the subset you want or build a list manually or have some other way to do the selection on a case-by-case basis--Matlab is smart, but its not prescient in being able to discern whow wanted and whos not automagically. As that other respondent noted, his solution works--move the wanted files into their own subdirectory. NOTE: If your file has a text header, missing data, or uses non white-space delimiters, you should check out the documentation for textread to determine which options to use. When calling a function or indexing a variable, use parentheses. Whats the problem I thought at first it might be the curvy brackets for the filepathsi, but Ive tried both the parenthesis () and the square brackets. Same error. Theres still something wrong with how Im calling the textscan() function. Also, all the text file are identical in the sense that only the values change. We use the semicolon as the delimiter, but as for the 4th column, theres no semicolon at its end. But, guess what Another error appeared and this one puzzles me even more: Error using textscan Empty format character vector is not supported at the end of a file. Error in MatLab - Conseil (line 17) data textscan(filepathsi,, headerlines, 8, delimiter,; ). I suspect the issue is that there is not semicolon after the row number, so it is trying to treat 9 189.95 as an entire number. I think you would be better off using formatspec instead of marking a delimiter. Something like: format 2.0d 5.2f; 5.2f; 5.2f; data textscan(filepathsi, format, headerlines, 8).
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