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FIR
0

converting binary to decimal

Asked by FIR
on 19 Jan 2013
i have a value as S=-5
i converted it to binary by
Cw1=dec2bin(typecast(int16(S),'uint16'),15)
now how to convert again to -5
plz assist

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2 Answers

Answer by Image Analyst
on 19 Jan 2013
 Accepted Answer

Why are you using uint16 when you have a negative number?????
Anyway,...
S = -5;
Cw1=dec2bin(typecast(int16(S),'uint16'),15)
S_recovered = bin2dec(Cw1)
maxUint16 = intmax('uint16')
maxInt16 = intmax('int16')
if S_recovered > maxInt16
S_recovered = int16(S_recovered - double(maxUint16) - 1)
end
S_recovered will be -5 as a signed 16 bit integer, which is what I assume you want.

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Answer by Walter Roberson
on 19 Jan 2013

typecast(bin2dec(Cw1), 'int16')

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FIR
on 21 Jan 2013
Walter i get
typecast(bin2dec(Cw1), 'int16')
ans =
0 0 -160 16623
typecast(uint16(bin2dec(Cw1)),'int16')

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