These were accumulated (a few hundred FFT output specra). A single FFT
output would never look so clean, which makes it hard to see an actual
spectrum.
Jason
On 23 Jun 2010, at 02:01,
wrote:
Hi Jason:
The plots you sent is a accumulated result or it is a single FFT
output.
Thanks
Hi Jason:
The plots you sent is a accumulated result or it is a single FFT output.
Thanks
Wan
-Original Message-
From: Jason Manley [mailto:jasonman...@gmail.com]
Sent: Thursday, 17 June 2010 7:31 PM
To: Cheng, Wan (CASS, Marsfield)
Cc: casper@lists.berkeley.edu
Subject: Re: Green FFT
"for i in [set]" is probably one of the most universally recognized
constructs in all of computer science! (Unsubstantiated generalization
alert:) Anyone who's been programming for more than a couple of weeks
who sees a variable named "i" inside of a loop instantly knows its
general purpose and be
Moral: Use str2num or str2mat. I don't know why we need a custom
tostring function.
Sometimes this function needs to accept strings themselves and just
pass these through. The "tostring" function just wraps num2str in
certain cases. It's nothing special, but it helps to maintain scripts
Hi Jason:
Thanks. This will also explain why the latest casper library cannot work with
me.
But it seems that FFT block can always work when I setup it up at first time.
But I cannot modify it because it will be broken.
Cheers
Wan
-Original Message-
From: Jason Manley [mailto:jasonma
I agree, too. But years ago when I started programming in C, I wanted
to keep i & j available for other purposes without confusing myself, so
early
on I formed the habit of using k, l, & m as loop variables. I still do
so to
this day.
Dana
Andrew Lutomirski wrote:
On Thu, Jun 17, 2010 at
That's a great idea, Jonathan! I was going to suggest adding "i =
sqrt(-1);" to scripts that need to ensure that i had not been
redefined, but I like this convention better. It's too bad that
Matlab didn't start out enforcing this from the start and instead
allowed an unadorned, uninitia
One could also use the complex() function to avoid ambiguity.
Mark
On Thu, Jun 17, 2010 at 11:06 AM, Jonathan Landon <
silicondiode2...@yahoo.com> wrote:
> Recent versions of Matlab encourage use of a modified variable name for
> sqrt(-1) -- i.e., 1i and 1j instead of i and j. Using i,j as loo
Recent versions of Matlab encourage use of a modified variable name for
sqrt(-1) -- i.e., 1i and 1j instead of i and j. Using i,j as loop variables is
fine as long as complex numbers everywhere else are 1i or 1j. Users familiar
with Matlab have learned never to use i,j as loop variables since
On Thu, Jun 17, 2010 at 12:47 PM, Peter Williams
wrote:
> On Thu, 2010-06-17 at 15:54 +0200, Jason Manley wrote:
>> ...
>> 1st year comp.sci classes taught us to use descriptive variable names.
>> That includes iterators. It's sound advice that could have avoided a
>> lot of trouble and saved a lo
On Thu, 2010-06-17 at 15:54 +0200, Jason Manley wrote:
> ...
> 1st year comp.sci classes taught us to use descriptive variable names.
> That includes iterators. It's sound advice that could have avoided a
> lot of trouble and saved a lot of time. I think we should avoid using
> i and j as var
Hi Jason,
wow . reminds me of when I used IF in a script on the control computer
at hatcreek
several decades ago, and all hell broke loose, which required
re-booting, because
I had unwittingly destroyed the operating system by redefining IF, THEN, ELSE
logic. Now IF is a very sensible name for
No, the problem is not with scope. You can build designs with two
different FFTs no problem. The issue was that some of the scripts
would use i and j as iterators, and then something like a=1+2*i
wouldn't return the complex number expected. We've side-stepped the
problem by saying "a=1+2i"
> Hello CASPERites
>
> Many of you will be aware of a long-standing bug in the FFT libraries
> which caused degraded performance. We believe that we've fixed it.
> Andrew Martens and myself performed some repairs earlier this week and
> have checked-in our script changes to the CASPER subversion (n
No, the FFT redraw scripts used i and j internally, which broke things
too. So you're affected! You need to recompile your FFT.
Jason
On 17 Jun 2010, at 11:27, wrote:
Hi Jason:
I guess if I build my own blocks with 'i' or 'j' as a loop, it would
be a problem.
But if I If I did not write
Hi Jason:
I guess if I build my own blocks with 'i' or 'j' as a loop, it would be a
problem.
But if I If I did not write any matlab scripts and only use the casper library
standard green block, I would not be affect. Is this right?
And could you clarify in which case user can overwrite the casp
Hello CASPERites
Many of you will be aware of a long-standing bug in the FFT libraries
which caused degraded performance. We believe that we've fixed it.
Andrew Martens and myself performed some repairs earlier this week and
have checked-in our script changes to the CASPER subversion (now g
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