For example, the integer NaNis represented as zero in MATLAB. To sum up: fid = fopen('path/to/myfile') ĭata = textscan(fid,'%*s %s %s %f %f %f','Delimiter',',') ĭata now contains a cell array with each column in a cell. Textscan ()is designed to convert numeric fields to a specific output type, following MATLAB rules with respect to the process of overflow, truncation, and the application of NaN, Inf, and -Inf. 304 4 15 Do you have the ability to change the process that writes the text file and change it to output a binary instead I know this is not an answer to your problem but it provides an alternate path to get at the information you need. textscan offers more user-configurable options. textscan offers more choices in how the data being read is converted. Which command should I use if I'm importing data. The command seems to work fine if I only have a vector in the text file, but if I have a matrix, matlab will change the structure of the data and store the matrix as a vector. With textscan, you don't need to match the number of output arguments to the number of fields being read as you would with textread. Is textscan the correct command to use when importing data from text files into matlab. Your file probably contains 49 lines or less, so everything ends up being discarded. readtable determines the file format from the file extension. The character '1' is interpreted as its ASCII value, 0x31 (49 decimal), so the first 49 lines are skipped. Description example T readtable (filename) creates a table by reading column oriented data from a file. Finally, 'Delimiter',',' states that all commas should be interpreted as the delimiter between each column. textscan returns a single cell array regardless of how many fields you read. 1 Answer Sorted by: 3 I think your problem is that you have specified a string instead of an integer value for HeaderLines. %f means "interpret as doubles (floats)". Textscan and Fscanf in Matlab Learnrope Tutorials 855 subscribers Subscribe 130 Share Save 39K views 8 years ago Matlab Tutorial Learn how to use Textscan and FscanF functions in Matlab. The asterisk in %*s means "ignore this column". To do this, call: data = textscan(fid,'%*s %s %s %f %f %f','Delimiter',',') Finally, 'Delimiter',',' states that all commas should be interpreted as the delimiter between each column. Ignore string string double double double To do this, call: data textscan (fid,'s s s f f f','Delimiter',',') The asterisk in s means 'ignore this column'. To do so, get a file identifier of the text file with fopen: fid = fopen('path/to/myfile') Īssume for the data in this example, we want to ignore the first column "Data", read the date and time as strings, and read the rest of the columns as doubles, i.e. One may use textscan to read this quite fast. Date and time strings to numeric array fastĪssume you have formatted data in a large text file or string, e.g.Ordinary Differential Equations (ODE) Solvers.Fourier Transforms and Inverse Fourier Transforms.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |