![]() However, the matrix must be manipulated somewhat to get it back into the original form from the file. Instead of using the fgetl function to read one line at a time, once a file has been opened the fscanf function can be used to read from this file directly into a matrix. If it is desired to perform calculations using the number, the function str2num would be used to convert the number stored in the string variable into a double value. The string function strtok is then used to store the number and the character in separate variables, both of which are string variables (the sec- ond variable actually stores the blank space and the letter). > type subjexp.dat 5.3 a 2.2 b 3.3 a 4.4 a 1.1 b ****************** Sample output of attached script: > fileex 5.30 a 2.20 b 3.30 a 4.40 a 1.10 b File close successful ****************** For attached example: -In this example, in the loop each time the fgetl function reads one line into a string variable. To use these, the file must be opened first and then closed when the reading has been completed. If this is not the case, lower-level functions must be used. The function load will work only if the values in the file are all the same type and the same number of values are on every line in the file, so that they can be read into a matrix. When a file has both characters and numbers. 6) type: Used to display contents of a file The function call feof(fid) would return logical true if the end of the file has been reached for the file identified by fid, or logical false if not. 5) feof: Returns logical true if the end of the file has been reached. If there's a new line character, it is gotten rid of -Normally placed in a loop that goes until end of the file -Can be used in a loop to read each line from the file as a separate string string manipulating functions must then be used to break the string into pieces and convert to numbers *****SAMPLE of fgetl % using fgetl x = y = while feof(fid) = 0 aline = fgetl(fid) aline = aline(2:end) = strtok(aline,'y') x = ystr = rest(2:end) y = end ***** 4) fgets: Same as fgetl, but keeps new line character NOTE: All of these functions (above) require first opening the file, and then closing it when finished. No loop required 3) fgetl: Reads strings from a file one line at a time. ![]() File must be opened first and then closed. ![]() The fscanf and textscan functions can read the entire data file into one data structure. Will read into a matrix and convert characters to ASCII equivalents 2) textscan: reads text data from a file and stores the data in a cell array it also uses conversion formats >textscan(fid,'format') -'format' includes conversion characters much like those used in the fprintf function like >textscan(fid,'%c %f') -Reads into a cell array that stores each column from the file into separate column vectors of the cell array. However, if it is looking for a character, it would read a whitespace character. Opening the file in Notepad++ and converting it to ANSI format fixed any of the issues I was having.Fid = fopen('subjexp.dat') 1) fscanf: reads formatted data into a matrix, using conversion formats such as %d for integers, %s for strings, and %f for floats >fid=fopen('file.dat') >fscanf(fid, data type, ) -It is important to note that if the fscanf function is looking for a number, it will skip over whitespace characters including blank spaces and newline characters. Further inspection revealed that the file imported with a whitespace between every single character on each line. Has anybody had a similar problem and might be able to offer a fix?įound the error, wanted to leave my solution for anybody who googles in the future. With this, there appears to be a blank line between each of my data lines that does not show up on text editor, which I believe to be the root of my problem. Digging into the issue a bit, I've tried looking at each individual line with fgetl(). However, when I use the following textscan line: Data = textscan(FileID, '%f%f%f%f%*','HeaderLines',2) Time ( min ),Stress ( MPa ),Position ( mm ),Load ( kN ),Zone In Excel or a text editor like Notepad++, the data appears as follows: Start of Test Thu 12:00:27 I'm trying to read in a comma seperated text file that contains both floats and strings.
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