negative numbers to hexdecimal

How can i transform a negative number like 0,2378 into hexdecimal? The function num2hex and dec2hex, they don´t work! and the bitcmp(..) also doesn´t work.

thanks for helping.

[Azzi Abdelmalek]

0.2378 is not a negative number!

[Joao Costa]

sorry, "-0.238"!!

I have an array like this [0.34 0.56 -0.23 0.89 -0.65 -0.11 (...)] and i want to pass this values to hexadecimal!

[Amos]

Using Matlab2012a, num2hex(-0.238) works on my computer.

[Samuel Gray]

yeah, it works but what did you actually get...

hex notation is usually reserved for integers.

there is num2hex and dec2hex

the first will give you the 16-character representation,

the latter has a 2nd input that lets the user set the # of characters in the returned value

num2hex will work with both positive and negative reals.

[Walter Roberson]

Hex notation since at least the IBM 360 has been used to show the bits actually in memory, distinct from the interpretation that the bits are going to be given by the program and instructions. Instructions, characters, integers, floating-point numbers: hex to show you the real bits. Especially for those days when you suspect that the programming language or disassembler are treating a value incorrectly (which did happen...)