hex2dec for an character array

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Shrinish Donde 2022-10-4

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https://ww2.mathworks.cn/matlabcentral/answers/1817065-hex2dec-for-an-character-array

评论： Walter Roberson 2022-10-5

Hello

I have an array of hex numbers which I want to convert to decimal. These is an array converted from a table.

For eg.var = readtable()

var = table2array(var)

Now when I try to use hex2dec on this var it does not work. It gives the error message:

"Error using hex2dec

Hexadecimal text must consist of characters 0-9 and A-F."

When I put a quotation for each individual number inside the var, I can get it to work. But since this is an array with thousands of numbers, I cannot do it this way. I need to use hex2dec(var(:,1)) on the entire array. is there any way I can do it ?

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David Hill 2022-10-4

Attach your data.

Walter Roberson 2022-10-5

在 MATLAB Online 中打开

cs = cellstr(var);
ca = vertcat(cs{:});
u = unique(ca(:))

Look carefully at the output of u for any characters other than A B C D E F a b c d e f 0 1 2 3 4 5 6 7 8 9 . In particular look for space in the output. hex2dec() can handle leading and trailing spaces, but not embedded spaces.

For example if one of the strings as DE AD BE EF then hex2dec() would not be able to handle the space.

If you have an array with embedded spaces, then do you want each element to become an output value, or should the elements be grouped together? For example you might want to group BE EF together to get hex BEEF (a 16 bit integer) ?

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