How do perform negation on binary values using matlab?

2014 2 20
2 个回答
更新时间：2021 7 26
4 次查看（30 天）

0 个投票

for example given input is = 10011011 i need negation of only MSB bit therefore the result should be =00011011 how can this be performed using MATLAB

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the cyclist
the cyclist 2014-2-20
编辑：the cyclist 2014-2-20
What is the variable type? Is it a character string?
yeshwini
yeshwini 2014-2-21
yes sir, one was binary cancatenation and the other is negation of bit here input is binary means bits

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回答（2 个）

the cyclist
the cyclist 2014-2-20

1 个投票

Here is one way, if the input is a character string:
char(num2str(x'=='0'))'
I feel that there must be a better way, and I am just being dumb.
the cyclist
the cyclist 2014-2-20

0 个投票

char('a'-x);
where x is your input string.

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the cyclist
the cyclist 2014-2-21
The synergy was quite deliberate on my part. If you would like to enter this as a solution yourself, I will happily delete this one, to give you the credit.
David Young
David Young 2014-2-21
I realised that it was deliberate - and effective! I put a solution on Cody, no need to change anything.
yeshwini
yeshwini 2014-2-21
char('a'-x); helo sir,what is 'a' here
the cyclist
the cyclist 2014-2-21
'a' is the character string for the letter 'a'. This is a nice trick to "subtract" your string x from the ASCII character 'a', which gives you what you want.
So, if
x = '0110';
y = char('a'-x);
will result in y having the value '1001'.

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