How to convert hex number '0' to binary when it is at first place in a bit stream

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kamila
kamila 2014-4-4
评论： kamila 2014-4-4
hex_str='0123';
actual answer is 0000000100100011 but matlab is not showing the starting zeros as it giving the answer 10010011

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Azzi Abdelmalek
Azzi Abdelmalek 2014-4-4
编辑：Azzi Abdelmalek 2014-4-4
s='0123'
b=strjoin(cellfun(@(x) dec2bin(hex2dec(x),4),regexp(s,'.','match'),'un',0),'')

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Joseph Cheng
Joseph Cheng 2014-4-4
编辑：Joseph Cheng 2014-4-4
reading the documentation on dec2bin you can specify the number of bits
>> hexstr= '0123';
>> n=length(hexstr);
>> d = hex2dec(hexstr);
>> dec2bin(d,2^n)
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