How can I show the 4-byte hex representation of a single precison float value?

Is there a way to show/display the 4-byte hex and/or binary representation of a single precision float value in Matlab and/or Simulink?

Answer 1

[James Tursa]

s = your single float number
h = dec2hex(typecast(s,'uint32'),8)

And the reverse is

s = typecast(uint32(hex2dec(h)),'single')

If you want binary then see the dec2bin( ) and bin2dec( ) functions.

[glentall]

Thank you - I will explore this!

[glentall]

I first tried your equations using the default variable type (double) at the Matlab command window and had erroneous results. Once I remembered to change 's' to a 'single,' I got the correct results that I desired.

Thanks James!

[li li]

best method of format conversion from hex to float !

very thanks!

[Walter Roberson]

s = rand('single')

s = single 0.7387

dec2hex(typecast(s,'uint32'),8)

ans = '3F3D1D5B'

num2hex(s)

ans = '3f3d1d5b'

In my opinion, numhex() is better for this purpose, as it is shorter and does not require as much technical knowledge.

Answer 2

[Walter Roberson]

num2hex() gives a single call for this.