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ischar function:
The ischar function return the logical true if an array is a character array, or logical false if not.
>> vec = 'EK127';
>> ischar(vec)
ans =
1
>> vec = 3:5;
0
Replacement : Replace a row by adding it to (or subtract from it) a multiple of the other row. For a given row ri, this is written as ri - srj → ri Note that when r
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