Convert data to binary and ASCII format

2013 12 9
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更新时间：2013 12 9
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If the variable
a=[3 2 1; 1 2 3; 2 3 1]
b=[1 2 3; 4 6 7; 5 3 5]
c=[a*b]
How to I save each variable as binary format and ASCII format?

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回答（1 个）

sixwwwwww
sixwwwwww 2013-12-9
编辑：sixwwwwww 2013-12-9

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You can do it as follow:
a = [3 2 1; 1 2 3; 2 3 1];
dec2bin(a) % decimal to binary conversion
b = double(num2str(a)) % decimal to ASCII conversion

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Darren
Darren 2013-12-9
Thanks. But I just realized my coursework matrix have a negative integer in the matrix. And there's an error when I try to convert it to binary format using your method.
Eg
a=[-3 2 1; -1 2 3; 2 -3 1]
How do I convert to binary format in this kind of situation?? And 1 more thing, how do I save the converted format to disk at the end of the program?
Walter Roberson
Walter Roberson 2013-12-9
There are three different "standards" for converting negative integers. You need to decide which one you are going to use: sign bit, one's complement, or two's complement.
You can save the converted to disk using fprintf() or fwrite(); or you can use save(); or you can use one of the higher level routines such as csvwrite() or dlmwrite() or xlswrite().
Darren
Darren 2013-12-9
I get the saving to disk part but I don't understand sign bit, one's complement, or two's complement as I never heard or learn about them before.
Can you give me an example of how to convert a=[-3 2 1; -1 2 3; 2 -3 1] into binary format using signbit, one's complement or two's complement?
Walter Roberson
Walter Roberson 2013-12-9
Have you decided yet which representation you are going to use ?

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Darren
2013-12-9

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2013-12-9

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