search for: inifinity

...hat stores a lot of Floats into MySQL database. Simplified version of the program use the following form of class. class Val < ActiveRecord::BASE end And Vals table contains one column: num double One of my data contains -Infinity for num and when I try to Val.new Val.num = <- Here goes -Inifinity Val.save! Then the program crashes: "/usr/local/stow/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.3/lib/active_record/connection_adapters/abstract_adapter.rb:120:in `log'': Mysql::Error: Unknown column ''Infinity'' in ''field list'': INSERT INTO ful...

I'm running into problems trying to use the nls function to fit the some data. I'm invoking nls using nls(s~k/(a+r)^b, start=list(k=1, a=13, b=0.59)) but I get errors indicating that the step has been reduced below the minimum step size or an inifinity is generated in numericDeriv. I've tried to use a variety of starting values for a, b, k but get similar errors. Is there anything I can do to get the a fit or is there an alternative to the nls function? -- Suchandra Thapa <s-thapa-11 at alumni.uchicago.edu>

...try compiling and running this program: > >--- >#include <limits> >#include <iostream> >int main() { > std::cerr << std::numeric_limits<float>::infinity() << "\n"; >} >--- > > Sure thing. It prints "0". Calling that inifinity is somewhat of a stretch, isn't it ? What on earth is going on here? Log: ---------- [finna at coplin11 debug]$ cat - > tst.cpp #include <limits> #include <iostream> int main() { std::cerr << std::numeric_limits<float>::infinity() << "\n"; } [finn...

...t; >--- > >#include <limits> > >#include <iostream> > >int main() { > > std::cerr << std::numeric_limits<float>::infinity() << "\n"; > >} > >--- > > > > > Sure thing. It prints "0". Calling that inifinity is somewhat > of a stretch, isn't it ? Well I think that explains why the linscan allocator doesn't work for you! :) It looks like numeric_limits::infinity has had a line of problems: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5527 http://lists.suse.com/archive/suse-programming-e/2003...

On Tue, 4 May 2004, Finn S Andersen wrote: > Chris wrote in a followup: > > > Can you send the output of 'llc -o - foo.bc -debug -print-machineinstrs'? > > > Attached as "linscan". (But added the "-regalloc=linearscan" to provoke > the error). Yes, that's exactly what I meant... thanks for reading my mind! :) It looks like this is where

On Oct 29, 2012, at 5:18 PM, Krzysztof Parzyszek <kparzysz at codeaurora.org> wrote: > On 10/29/2012 6:34 PM, Michael Ilseman wrote: > > > > N: no NaNs - ignore the existence of NaNs when convenient > > Maybe distinguish between quiet and signaling NaNs? > > > > NI - no infs AND no NaNs > > x - x ==> 0 > > Inf > x ==> true

OK, details: I run RH8 (gcc 3.2.something), RH9 (gcc 3.2.2-5) and Fedora. Problems are the same across all setups. Hardware is Athlon 1600+ and half a giga RAM. Runs fail with an assertion when the linear scan allocator is enabled, but runs without problems otherwise. On RH9 (the system I have access to while generating this email) I have the following details: > 1) The LLVM assembly

...amel at hepcat> Content-Type: text/plain I'm running into problems trying to use the nls function to fit the some data. I'm invoking nls using nls(s~k/(a+r)^b, start=list(k=1, a=13, b=0.59)) but I get errors indicating that the step has been reduced below the minimum step size or an inifinity is generated in numericDeriv. I've tried to use a variety of starting values for a, b, k but get similar errors. Is there anything I can do to get the a fit or is there an alternative to the nls function? -- Suchandra Thapa <s-thapa-11 at alumni.uchicago.edu> ----------------------...