Floating point to 16 bit hexadecimal

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Tousif Ahmed 2018-4-23

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https://ww2.mathworks.cn/matlabcentral/answers/396789-floating-point-to-16-bit-hexadecimal

评论： Tousif Ahmed 2018-4-24

采纳的回答： Ameer Hamza

Hello all, how can i convert floating point decimal to 16 bit hexadecimal value?

Thank you

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Guillaume 2018-4-24

Specifying the encoding used would be helpful. Is it IEEE 754 half precision you're after?

Tousif Ahmed 2018-4-24

yes IEEE 754 half precision

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Ameer Hamza 2018-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/396789-floating-point-to-16-bit-hexadecimal#answer_316858

编辑：Ameer Hamza 2018-4-24

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You can use this file exchange submission. It will convert your number to 16-bit half precision format. But instead of returning as a string, it will return the equivalent uint16 MATLAB object. To get binary string, you can do this,

halfPrecisionNumber = halfprecision(1.2);  % halfprecision() is provided in the file exchange package.
halfPrecisionString = dec2bin(halfPrecisionNumber, 16);

In case you face the following error on running the package

"Floating point bit pattern is not IEEE 754"

you can try following

Open halfprecision.c file.
Add following to include section

#include <stdint.h>

Replace 4 #define with the following macros

#define INT16_TYPE int16_t 
#define UINT16_TYPE uint16_t 
#define INT32_TYPE int32_t 
#define UINT32_TYPE uint32_t

Run mex halfprecision.c.

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Guillaume 2018-4-24

编辑：Guillaume 2018-4-24

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Use dec2hex instead of dec2bin in Ameer's answer. Do not use num2hex which is not all suited for what you want.

halfPrecisionNumber = halfprecision(1.2);  % halfprecision() is provided in the file exchange package.
halfPrecisionHex = dec2hex(halfPrecisionNumber, 4);

Tousif Ahmed 2018-4-24