Main Content. Open Live Script. Read File Contents into Array. Skip Specific Characters in File. Skip specific characters in a sample file, and return only numeric data. Create a sample text file containing temperature values. Input Arguments collapse all fileID — File identifier integer. Data Types: double. Numeric Fields This table lists available conversion specifiers for numeric inputs.
If the initial digit is 0 , then values are octal base 8. Fields and Characters to Ignore fscanf reads all numeric values and characters in your file in sequence, unless you tell it to ignore a particular field or a portion of a field. Field Width To specify the maximum number of digits or text characters to read at a time, insert a number after the percent character.
Literal Text to Ignore fscanf ignores specified text appended to the formatSpec conversion specifier. For numeric data, the output, A , is a column vector. For text data, A is a character vector. For text data, A , is a character vector. The output, A , is m -by- n , filled in column order. Output Arguments collapse all A — File data column vector matrix character vector character array.
The class and size of A depend on the formatSpec input: If formatSpec contains only numeric specifiers, then A is numeric. Otherwise, A is of class double. Number of characters read, returned as a scalar value. Tips Format specifiers for the reading functions sscanf and fscanf differ from the formats for the writing functions sprintf and fprintf. Usage notes and limitations: For MEX code generation, the code generator treats fscanf as an extrinsic function.
If you generate MEX, dynamic memory allocation must be turned on. These are some examples: In the generated code, if fscanf reads a null byte, the returned values might be truncated. Select a Web Site Choose a web site to get translated content where available and see local events and offers. The values in the file determine the base: The default is base Read only characters in the brackets up to the first nonmatching character or white space.
Read to the end of the file. The text file is indicated by the file identifier, fileID. Use fopen to open the file, specify the character encoding, and obtain the fileID value. When you finish reading, close the file by calling fclose fileID. For numeric data, this is the number of values read. You can use this syntax with any of the input arguments of the previous syntaxes.
Define the format of the data to read. Read the file data, filling output array, A , in column order. Transpose the array so that A matches the orientation of the data in the file. Also return the number of values that fscanf reads. A is a vector containing the numeric values in the file.
File identifier of an open text file, specified as an integer. Before reading a file with fscanf , you must use fopen to open the file and obtain the fileID. Format of the data fields in the file, specified as a character vector or string scalar of one or more conversion specifiers.
When fscanf reads a file, it attempts to match the data to the format specified by formatSpec. This table lists available conversion specifiers for numeric inputs. If the initial digits are 0x or 0X , then the values are hexadecimal base Read any single character, including white space.
To read multiple characters at a time, specify field width. If formatSpec contains a combination of numeric and character specifiers, then fscanf converts each character to its numeric equivalent.
To specify the maximum number of digits or text characters to read at a time, insert a number after the percent character. Dimensions of the output array, A , specified as Inf , an integer, or a two-element row vector. File data, returned as a column vector, matrix, character vector or character array. The class and size of A depend on the formatSpec input:.
If formatSpec contains only numeric specifiers, then A is numeric. If you specify the sizeA argument, then A is a matrix of the specified size. Otherwise, A is a column vector. If the input contains fewer than sizeA values, then fscanf pads A with zeros. If formatSpec contains only bit signed integer specifiers, then A is of class int If formatSpec contains only bit unsigned integer specifiers, then A is of class uint If you specify sizeA and the input contains fewer characters, then fscanf pads A with char 0.
If formatSpec contains a combination of numeric and character specifiers, then A is numeric, of class double , and fscanf converts each text characters to its numeric equivalent.
Can someone help me. Just using textscan and ignoring the things you don't need, like the numbers and : gives you quite a simple solution:. I assume that the colon : seperates values in a row and the semicolon ; is separating rows. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 11 years, 11 months ago.
Active 9 years, 4 months ago. Viewed 4k times. Improve this question. Amro k 25 25 gold badges silver badges bronze badges. Abe Abe 9 1 1 silver badge 2 2 bronze badges. I can probably help you, but I'm not sure what you want. Can you give the desired output for the given input?
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