Separate the digits in a hex number

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fiona rozario
fiona rozario 2017-2-18
评论： fiona rozario 2017-2-19
I want to use the digits from hex numbers as indices to a lookup table. Eg: if the number is A9, A corresponds to the row of the lookup table and 9 corresponds to the column, so that I can pick up the value of the cell at the intersection of this row and column.
How can I separate 'A' and '9' in hex?

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Walter Roberson
Walter Roberson 2017-2-18
>> sscanf('A9', '%1x')
ans =
10
9
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John D'Errico
John D'Errico 2017-2-18
编辑：John D'Errico 2017-2-18
If you want the digits as an index into a table, then since indexing is 1-based in MATLAB, you want 'A' to map to 11, '9' maps to 10, '0' to 1, etc.
This will do:
H = 'F5A9';
[~,ind] = ismember(H,'0123456789ABCDEF')
ind =
16 6 11 10

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