can we write hexadecimal values in matlab too?

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Imtiaz nabi 2022-3-4

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https://ww2.mathworks.cn/matlabcentral/answers/1663399-can-we-write-hexadecimal-values-in-matlab-too

评论： Walter Roberson 2022-3-5

Hi there I want to write some hexadecimal values in matlab for example

// Add TOW-count message into HOW
    if (iwrd==1)
	    sbfwrd |= ((tow&0x1FFFFUL)<<13);
    
    // Compute checksum
    sbfwrd |= (prevwrd<<30) & 0xC0000000UL; // 2 LSBs of the previous transmitted word
    nib = ((iwrd==1)||(iwrd==9))?1:0; // Non-information bearing bits for word 2 and 10
    chan->dwrd[iwrd] = computeChecksum(sbfwrd, nib);

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Answer 1

Walter Roberson 2022-3-4

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1663399-can-we-write-hexadecimal-values-in-matlab-too#answer_909554

在 MATLAB Online 中打开

https://www.mathworks.com/help/matlab/matlab_prog/specify-hexadecimal-and-binary-numbers.html

0x1FFFFu32

The C code is a bit weak in that it assumes unsigned long is 32 bits.

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Imtiaz nabi 2022-3-5

but when I try to store these in a variable it automatically converts into deciamal in another computer that is running a matlab 2019b why is my computer giving me an error?

Walter Roberson 2022-3-5

https://www.mathworks.com/help/matlab/matlab_prog/specify-hexadecimal-and-binary-numbers.html

Starting in R2019b, you can write hexadecimal and binary values as literals using an appropriate prefix as notation. For example, 0x2A is a literal that specifies 42—and MATLAB stores it as a number, not as text.

So the reason for the difference between the r2019b system and your R2017b system is that MATLAB was improved as of R2019b to support hexadecimal constants.

Which is why earlier I said "in your version" of MATLAB that hex2dec and sscanf were your available choices.

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