%% Convert the contents of columns containing numeric strings to numbers. Learn more about fscanf, textscan, headerlines Hi, I have attached a txt file which I want to read onto a matrix I also have another file, which has six columns instead of two. If an error occurs for a different file, try regenerating the codeĭataArray = textscan(fileID, formatSpec, 'Delimiter', delimiter, 'MultipleDelimsAsOne', true, 'ReturnOnError', false) readmatrix determines the file format from the file extension. store string and integer type CSV file into a matrix matlab. Hmm but this solution reads data into a matrix, while I need to read it into a cell array and also using fid identifier (which textscan does). The readmatrix function performs automatic detection of import parameters for your file. matlab csv matrix textscan or ask your own question. % This call is based on the structure of the file used to generate this A readmatrix (filename) creates an array by reading column-oriented data from a file. %% Read columns of data according to format string. % For more information, see the TEXTSCAN documentation.įormatSpec = '%s%s%s%s%s%s%s%s%s%s%s%s%' % generate a function instead of a script. % To extend the code to different selected data or a different text file, % \\invol-vs-fp1\Users$\d.jaheruddin\MATLAB\test.txt % Script for importing data from the following text file: Matlab's textscan() function deals with this very neatly, as you can do this: array textscan(fid, 'field1d field2d field3d ' and you will get back a cell-array where each column contains the respective field, and the text is simply ignored. These conversion specifiers determine the type of each cell in the output cell array. MATLAB parses the data into fields and converts it according to the conversion specifiers in the format string. Ken Atwell on The presence of multiple spaces between your numbers might be the culprit. Here is the (rather verbose) code generated by the importwizard when I use it on your data in a file called test.txt %% Import data from text file. C textscan(fid, 'format') reads data from an open text file identified by file identifier fid into cell array C. If you have to automate it, you can let the importwizard do code generation for you. Select cell array or matrix as desired form.But if you really want to eat cheese, do it as follows: fid = fopen('myData. Test = textscan(fid, '%*f %f %*','HeaderLines',0) īut I tell you, you will get fat. I may want to look at a different set of 6889 lines within the text file. M dlmread (filename,delimiter) reads data from the file using the specified delimiter and treats repeated delimiter characters as separate delimiters. I am interested in blocks of 6889 lines where each set of 83 lines needs to write to a row of a matrix (83x83) - a different matrix for each column. If str is a character array with more than one row, sscanf reads the characters in column order. The dlmread function detects the delimiter from the file and treats repeated white spaces as a single delimiter. The sscanf function repeatedly applies formatSpec to sequences of characters in str until it either reaches the end of str or fails to match formatSpec to a sequence of characters. To make it work you would need to open another similar pack of cheese: fid = fopen('myData.txt') ĭata = textscan(fid, '%f %*f %*','HeaderLines',0) M dlmread (filename) reads an ASCII-delimited numeric data file into matrix M. And your second textscan call is left without any cheese. So after your command: data = textscan(fid, '%f %*','HeaderLines',0) Every line of the file which got read by textscan is like you have eaten one slice of cheese. The reason why your approach is not working is the file-ID fid. Textscan is horrible, and one should only use it when they're trying to parse data when there's no better way available. If the white space delimiter ' ' is not working, try tabulator '/t'. So how about importing everything in one variable and splitting it up afterwards? DATA = importdata('myFile.txt',' ',0)īe aware that if you have headerlines, the code varies a little: headerlines = 5ĭATA = importdata('myData.txt',' ',headerlines) At the moment you're scanning the whole file two times - that's not a good idea.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |