Convert hexadecimal cell information to struct

Question

Bram Surewaard 2020-8-11

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/578152-convert-hexadecimal-cell-information-to-struct

编辑： Bram Surewaard 2020-8-28

Data.mat

Hey,

So i have this Data that is a 8306x1 cell filled with 1x1872 cells, and each cell from this is filled with hexidecimal input. I have atteched the first 10 inputs of the Data file.

What I need to do is to get the hexidecimal input from certain cells and convert those to either char or normal values. This is where I am stuck as I have no idea how to achieve this. I tried using:

char(hex2dec(Data{1,1}(1,9:12)))

However then I get this:

  4×1 char array
    'B'
    'T'
    'H'
    '0'

And I need to have this into one char and not in this array form, and same goes for converting hexidecimal numbers into normal numbers for different amount of hexidecimal values.

I hope I have explained the problem well and anybody is able to help me.

Thanks!

Edit:

Oke so this would be the input starting from Data{1,1}{1,137} until Data{1,1}{1,156}

    '52'	'30'	'02'	'08'	'36'	'80'	'80'	'80'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'bb'	'02'	'bb'

And I would like to save it into a struct like this:

Frame.SectionName = R0 (short) , (so the first two cells of the input above ['52' '30'] )
Frame.SectionSize = 520 (short), (input 139 and 140 ['02' '08] )
Frame.ScalingFactor = 0.00000382965663 (floating point number) , (input 141 till 144, ['36'	'80'	'80'	'80'] )
Frame.Range = [ 698 698 698 698 699 699] so this needs to be able to save all the range measurements from many inputs, (input 145 till 156, ['02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'bb'	'02'	'bb'] )

I hope this is a bit clear, I got these names from a pdf file describing the data format which looks like this:

u16 R0_SectionName; // 'R0'

u16 R0_SectionSize; // [bytes] size of this entire section

f32 R0_ScalingFactor;

u16 R0_Range[H0_Points]; // [seconds two-way] = R0_Range * R0_ScalingFactor

With the type defenitions being:

typedef unsigned char u8;

typedef unsigned short u16;

typedef unsigned int u32;

typedef signed char s8;

typedef signed short s16;

typedef signed int s32;

typedef float f32;

typedef float f64;

UPDATE:

I managed to get it working for characters, however i cant seem to make it work for normal numbers.

For instance i have now a 1x4 cell array with 00 00 07 48 which i need to find a way to get it into one single number so that i can converti the hex (00000748) to the desired 1864

found it, it can be done with cell2mat

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Bram Surewaard 2020-8-12

在 MATLAB Online 中打开

Oke so this would be the input starting from Data{1,1}{1,137} until Data{1,1}{1,156}

'52'	'30'	'02'	'08'	'36'	'80'	'80'	'80'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'bb'	'02'	'bb'

And I would like to save it into a struct like this:

Frame.SectionName = R0 (short) , (so the first two cells of the input above ['52' '30'] )
Frame.SectionSize = 520 (short), (input 139 and 140 ['02' '08] )
Frame.ScalingFactor = 0.00000382965663 (floating point number) , (input 141 till 144, ['36'	'80'	'80'	'80'] )
Frame.Range = [ 698 698 698 698 699 699] so this needs to be able to save all the range measurements from many inputs, (input 145 till 156, ['02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'ba'	'02'	'bb'	'02'	'bb'] )

I hope this is a bit clear, I got these names from a pdf file describing the data format which looks like this:

u16 R0_SectionName; // 'R0'

u16 R0_SectionSize; // [bytes] size of this entire section

f32 R0_ScalingFactor;

u16 R0_Range[H0_Points]; // [seconds two-way] = R0_Range * R0_ScalingFactor

With the type defenitions being:

typedef unsigned char u8;

typedef unsigned short u16;

typedef unsigned int u32;

typedef signed char s8;

typedef signed short s16;

typedef signed int s32;

typedef float f32;

typedef float f64;

Bram Surewaard 2020-8-13

在 MATLAB Online 中打开

I think that it comes done to this:

I am able to get the data that I need with the following command:

Data{1,1}(1,34:37)

Which gives me:

1×4 cell array
    {'02'}    {'a5'}    {'7b'}    {'31'}

Now I need to stitch these numbers togeter into one number that i can convert with hex2dec.

However I am not able to find a way of getting this done and I dont know the right terminology to find it.

Does anybody know how I can achieve this?

Stephen23 2020-8-28

"Does anybody know how I can achieve this?"

Concatenation:

https://www.mathworks.com/help/matlab/math/creating-and-concatenating-matrices.html

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Answer 1

David Hill 2020-8-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/578152-convert-hexadecimal-cell-information-to-struct#answer_479355

在 MATLAB Online 中打开

hex2dec(cell2mat(a));

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Bram Surewaard 2020-8-28

This does stitch the number together, however the outcome is not the desired characters it is not just a large number, any idea how I can still convert this to a string of characters?

Bram Surewaard 2020-8-28

Found it, I can use convertCharsToStrings() to stitch the 4x1 char into one string

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Convert hexadecimal cell information to struct

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