Re: how to read in a number in hex and convert it to binary
- To: mathgroup at smc.vnet.net
- Subject: [mg105220] Re: [mg105176] how to read in a number in hex and convert it to binary
- From: Carl Woll <carlw at wolfram.com>
- Date: Wed, 25 Nov 2009 02:29:37 -0500 (EST)
- References: <200911231153.GAA22070@smc.vnet.net>
Michael O'Hanrahan wrote: > Hi, newbie question I'm afraid, but I couldn't work out how to do this from the help. I'm using Mathematica 5.2. > > I've got a textfile containing about 30 thousand 256-digit numbers in hex. I need to read them in and work on them one by one. Reading them is fine using > > Read["hello.txt",Expression] > > Then I would like to turn each number into a fixed-length binary number, using something like > > IntegerDigits[16^^p, 2, 27] > > The problem is, this doesn't work. The argument of ^^ seems to need to be an actual number in hex, e.g. 16^A12B3, rather than a variable. > > Given that essentially ^^ is a two-argument function, is there a way to express it as such in Mathematica? > > I'm even having trouble getting the input to be accepted as a number at all . Replacing "Expression" (or "String") with "Number" or "Integer" doesn't work. > > Will be grateful for any help with this. > Thanks! > Michael > > You could try using FromDigits: In[73]:= FromDigits["A12B3", 16] Out[73]= 660147 Then, IntegerIDigits[660147,2,27] will do what you want. Carl Woll Wolfram Research
- References:
- how to read in a number in hex and convert it to binary
- From: "Michael O'Hanrahan" <hanrahan398@yahoo.co.uk>
- how to read in a number in hex and convert it to binary