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Writing data to a File:
The save function can be used to write a data from the matrix to the data file, or to append a data file. The format is as shown below:
save filename matrixvariablename -ascii
The -ascii qualifier is used when generating a text or data file. The following generates a matrix and then saves the values of the matrix variable to a data file known as the testfile.dat:
>> mymat = rand(2,3)
mymat =
0.4565 0.8214 0.6154
0.0185 0.4447 0.7919
>> save testfile.dat mymat -ascii
This generates a file known as the testfile.dat which stores the numbers
The type command can be used to show the contents of the file; note that the scientific notation is used as shown below:
>> type testfile.dat
4.5646767e-001 8.2140716e-001 6.1543235e-001
1.8503643e-002 4.4470336e-001 7.9193704e-001
Note: When the file already exists, then the save function will overwrite it; save always starts writing from the starting of a file.
Reading from a File: A file has been once created; it can be read into a matrix variable. When the file is a data file, the load function will read from the file filename.ext
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