So in your example when processing 'a,b,' with q it first processes the a as part of the q format, and then eats the delimiter that is there, leaving 'b,' in the. These are coordinates to regions of interest for each category in an image. Well, it tells us that after textscan finishes processing the format, it examines the input stream, consuming Whitespace and up to the first copy of the Delimiter, and then stops. The file comes out of a relational database (Antelope) and consists of earthquake location, dates, times, phase information, etc. When you are finished reading from the file, you should close the file by calling fclose (fid). Learn more about text file, block, textscan, text, read, parse, debug, debugging session, regexp, blocks MATLAB I have a text file that is in a rather funky format. fopen supplies the fid input required by textscan. For example, I would like to read the following data using. Finally, 'Delimiter',',' states that all commas should be interpreted as the delimiter between each column. Lets say some numeric data is not delimited, buth we can delimit it based on their location. %f means 'interpret as doubles (floats)'. Learn more about textscan, whitespace, delimiter MATLAB While using textscan, it doesn't seem to treat multiple whitespace as a single delimiter. The asterisk in %*s means 'ignore this column'. To do this, call: data = textscan(fid,'%*s %s %s %f %f %f','Delimiter',',') Ignore string string double double double 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.

Matlab textscan delimiter