# converting binary to decimal

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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

Image Analyst on 19 Jan 2013
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.

Walter Roberson on 19 Jan 2013
typecast(bin2dec(Cw1), 'int16')
##### 2 CommentsShowHide 1 older comment
Walter Roberson on 21 Jan 2013
typecast(uint16(bin2dec(Cw1)),'int16')

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