Floating point to 16 bit hexadecimal

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Tousif Ahmed
Tousif Ahmed 2018-4-23
评论： Tousif Ahmed 2018-4-24
Hello all, how can i convert floating point decimal to 16 bit hexadecimal value?
Thank you
  2 个评论
Guillaume
Guillaume 2018-4-24
Specifying the encoding used would be helpful. Is it IEEE 754 half precision you're after?

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Ameer Hamza
Ameer Hamza 2018-4-24
编辑：Ameer Hamza 2018-4-24
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
Guillaume 2018-4-24
编辑：Guillaume 2018-4-24

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
Tousif Ahmed 2018-4-24
cool that works perfectly. Thanks to Mr. Guillaume and Mr. Ameer Hamza

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