**Formatting of Inf floating-point values**While debugging some problems of my own,
I stumbled on this curiosity:
$ set tcl_patchLevel
8.5.8
$ set f [expr 1.0/0.0]
Inf
$ format %f $f
1.#INF00
Is this right/expected/documented? I couldn't find
anything about Inf or Nan in the [format] man pages.
This is on Windows; is it perhaps a quirk of the
underlying C library? On Linux I only have Tcl8.4,
where [expr] doesn't let me do divide-by-zero, but
its [format %f Inf] yields "inf" as I would expect
(isn't that what the C standard says?).
thanks
--
Jonathan Bromley
On 24 aug, 10:58, Jonathan Bromle...

**Formatting floating point values in ostream objects**This C program:
#include <stdio.h>
#include <math.h>
int main()
{
float value;
for(value = -1.0f; 1.1f > value; value += 0.1f){
printf("%.1f\n", value);
}
return 0;
}
Produces this output:
-1.0
-0.9
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Trying to write an equivalent C++ program using ostream has proven
tricky. Here is a solution I came up with:
#include <iostream>
#include <cmath>
int main()
{
static const float TOLERANCE = 0.0001f;
using std::cout;
cout << std...

**Getting float values from a formatted text file**Hi All
I want to read certain values from text file and need help.
My text file looks like the following
32 Fed 2044 25:61:61
Asdfg-Asdfg
Data Unavailable
Yaqw (UUUUU) Qwe (321) (deg) Asdfg (321) (deg) Yxcv (321) (deg)
----------------------- --------------- ----------------- ----------------
32 Def 2022 10:00:00.040 56.001 -0.001 0.137
32 Def 2022 10:00:00.060 56.000 -0.001 0.112
32 Def 2022 10:00:00....

**hex value ==> floating point value**Question:
For our GPS application I need to convert the minutes part (heximal value)
to a decimal/floating point value.
So: 41609218 (4 bytes) has to be converted to: 14.034 (approx)
(format of the float is IEEE-754 )
Thanx in advance for any help!!!!
Quarco
"Q" <dont@bother.com> wrote in message
news:45cc5a40$0$331$e4fe514c@news.xs4all.nl...
> Question:
>
> For our GPS application I need to convert the minutes part (heximal value)
> to a decimal/floating point value.
>
> So: 41609218 (4 bytes) has to be converted to: 14.034 (approx)
>
>...

**Convert floating point values to fixed point?**Hello,
I want to try using an fixed point based FFT routine instead of the current
floating point based routine. I have a user of my software that has a 800
Mhz VIA chipset motherboard, and the FPU on that thing is so bad, it can't
crunch an audio signal in real time (i.e. - while they are talking). On
non-VIA systems the computer is able to keep up in real time (it's a speech
recognition app.)
I found the KISS FFT project on SourceForge which is able to do fixed point
FFT as well as floating point
http://sourceforge.net/projects/kissfft/
However, when I use it compiled with fixe...

**Fixed-point format for floating-point numbers**Dear All,
Please how can I fix the significant places (number of digits after the
float point) for the floating-point numbers in java?
Thanks In Advance.
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Motaz Khalid Saad.
Department Of Computer Science
Information Technology College
Islamic University - Gaza - Palestine
http://www.iugaza.edu.ps
http://www.geocities.com/motsad
e-mail: motaz.saad@gmail.com , motsad@yahoo.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On 3 Nov 2005 14:52:52 -0800, "Motaz Saad" <motaz.saad@gmail.com>
wrote, quoted or indirectly quoted someone who said...

**Metastock Date Format (Microsoft Binary Floating Point Format)**Hi
I'm working on a program in Clipper 5.2d that reads Metastock data
files and then does various stuff with the extracted data.
Fortunately I found a document titled, unsurprisingly, 'MetaStock File
Format' by someone called Gianluca Scacco (http://
www.mirrorservice.org/sites/download.sourceforge.net/pub/sourceforge/m/ms/mstockfl/MetaStock.pdf)
and with the information therein have worked out most of what I need
to know, except how to decode the date values.
According to Mr Scacco's excellent document, date values are stored as
four bytes and are of type "Float CVS"...

**writing decimal values to z.-formatted fixed point values**Hello all
I find myself in the situation of having to write a value of, say,
-2146.9
as
-0000002146900
to a text file, where the number of decimal digits is fixed and known (3 in
the example).
Is there a convenient SAS format to do this ?
Thank you very much indeed
Daniele
Perhaps something like....
proc format;
picture dmz
/*12345678901234567890*/
low-<0 = ' 9999999999999' (mult=1e3 prefix='-')
0-high = ' 9999999999999' (mult=1e3)
;
run;
data _null_;
x = -2146.9;
y = x * 1e3;
put y= z14.;
put x=dmz.;
...

**MatLab database problem~to get integer values instead of floating-point values**Hi All,
I met a problem when programming a simple database application at
MatLab.
As you see the following code,
SELECT query would two data (base_dt and sum(rtn) ) from database.
one (base_dt column) is date-format.
the other ( sum(rtn) column ) is floating-point value.
but when running the following code, the second field is returned to be
integer instead of floating-point value.
the first field is what i expected : date format
In my thought, problem is related with the functions in query.
I failed to solve this problem by "setdbprefs".
FYR,
database is Oracle and matlab ve...

**floating point values**Hello.
I have a function that reads values from an image and uses
that number as an array index for a lookup table.
This works find for double type data that are integers.
My problem is when i try to use images that are floating
point values (.hdr) the function will not work as the lookup
array cannot be accessed using non-integer or literal values.
I need some way of reading the floating point data and
converting it into a representative value that is suitable
for indexing arrays.
Im trying to run this on a 96bit image file, so 32 bit
floating point values for each pixel.
Cheers
Ed
In a...

**floating point values**how can I take the fractional part of a floating point value
such that I can store that value into an integer type?
float foo = 6.180;
now take the fractional part
such that you can store 180 into an object
of type int or any other integer type.
I'm looking for way not involving the use of
float -> string -> parse string -> get 180 -> convert to int
but a process involving
float -> int
aegis <aegis@mad.scientist.com> wrote:
> how can I take the fractional part of a floating point value
> such that I can store that value into an integer type?
> float foo ...

**Registry contains reference to dll instead of description text, how to call dll to get text? (values in the format @xxxx.dll,-yyy )**I have a simple program that list information of all the windows
services from the registry.
Now in Windows Vista and 2008 server the display name and description
are not simple text strings, but a reference to a dll, see this
example:
The service "Application Experience":
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AeLookupSvc]
"DisplayName"="@%SystemRoot%\\system32\\aelupsvc.dll,-1"
"Description"="@%SystemRoot%\\system32\\aelupsvc.dll,-2"
Can anyone explain to me what this mean? I assume I have to call this
DLL to get the informat...

**analysis of floating point values**hi, is there a way by which we can see a bit-by bit representation of
how a floating point value is stored? I was thinking something similar
to how we shift bits using the >> and << operators but they only work
for integers. In short, I'd like to first find out what the size of
the value is in bytes and then analyse every bit in every byte. Is
this possible?
thanks!
On 18/02/2011 12:57, K4 Monk wrote:
> hi, is there a way by which we can see a bit-by bit representation of
> how a floating point value is stored? I was thinking something similar
> to how we ...

**Format of floating point output**I am reading TC++PL3, and on page 468, at "21.4.3 Floating-Point
Output", it formats floating point output in the style:
cout.setf(ios_base::scientific, ios_base::floatfield); // use scientific
// format
cout<< "scientific:\t"<< 1234.56789<< '\n';
However my compiler compiles "cout.setf(ios_base::scientific)" OK.
Does this statement affect more stream states than the original
statement using "ios_base::floatfield", or is "ios_base::floatfield"
usage, a re...

**Floating Point Formats are not linked**hi
Its been Given that Which error are you likely to get when you run the
following program?
main()
{
struct emp
{
char name[20];
float sal;
};
struct emp e[10];
int i;
for(i=0;i<=9;i++)
scanf("%s%f", e[i].name,&e[i].sal);
}
The answer given is Floating point formats are not linked.
so why this error will come ?
Before I get on to what neha said, I'll make a prediction, based purely on
the subject line. My prediction is that he's using a Borland compiler.
neha said:
> hi
>
> Its been Given that Which error ar...

**Fast Floating-Point Format**Hi,
I'm looking for an implementation of fast floating point FFT algorithm. I
found application notes (http://tiny.cc/EE185, Analog Devices) describing
addition and multiplication of fast floating point numbers. cftt function
inside VisualDSP library performs N-point radix-2 complex input FFT using
fract16 format. Could I find somewhere implementation for fastfloat16
format?
I haven't used VisualDSP, so I'm not quite familiar with VisualDSP
libraries
On Tue, 20 Oct 2009 09:05:47 -0500, _tomislav wrote:
> Hi,
>
> I'm looking for an implementation of fast...

**formatting floating-point-numbers**Hi
I need to format floating-point-numbers with exact 2 digits after decimal
point. I could use printf with "%.2f", but it don't use std::locale.
Any ideas?
--
Tommi M�kitalo
Dr. Eckhardt + Partner GmbH
"Tommi M�kitalo" <t.maekitalo@epgmbh.de> wrote...
> I need to format floating-point-numbers with exact 2 digits after decimal
> point. I could use printf with "%.2f", but it don't use std::locale.
>
> Any ideas?
Take a look at 'fixed' and other field flags from <ios>. They do
not use 'locale', IIRC.
V
&qu...

**Confused about Floating Point format**The "Art of Assembly" book (sec. 4.2) describes that binary strings
that represent floating point numbers practically always have a
mantisa that has a H.O. bit of "1" and thus normalized, but then it
goes on to mention that if it isnt normalized then you should
left-shift the mantisa. This doesn't compute to me, can anyone help?
'Preciate it.
"encryption_x" <spamtrap@crayne.org> wrote in message
news:c010664f.0409071830.23dc3663@posting.google.com...
> The "Art of Assembly" book (sec. 4.2) describes that binary strings
> that repre...

**invalid floating point value**OK, I realize that what I am asking here is not likely to have a
answer within the C standard. Nonetheless, it is not specific
to any particular platform, so I'll hazard the question anyway.
A C double can be aliased by an array of unsigned char, to which
any desired byte pattern may be written. Is there any somewhat
portable way of assigning a byte pattern such that the result
will, with very high probability, _not_ count as a valid double?
I ask because I'm in search of a mechanism for flagging "missing
values" in an array of doubles. I'm aware that the "best&...

**Error in floating point value**I have this error when i run my old cfd programs. Have can I solve this
problem?
Thanks!
You need to use the DOS extender
--
Ben E. Brady
http://www.clariondeveloper.com/diabetes/
Read the article... don't wait for the movie...
"Dvorski Josip" <mihaela.dvorski@vz.hinet.hr> wrote in message
news:bf3o89$3f4a$1@as201.hinet.hr...
> I have this error when i run my old cfd programs. Have can I solve this
> problem?
>
> Thanks!
>
>
This related to an internal loop ment to determine the machine
speed before program execution.
The solution has been poste...

**components of a floating point value**
I would like to portably extract the components of a floating point value:
sign, exponent, and significand. Based on the C floating point model
described in 5.2.4.2.2, I came up with the following code. There are
a couple of things to note about this code.
1) I convert the significand to an integer value in which the least
significant bit(s) of the integer correspond/s to the least significant
digit of the significand. This means that only as many low-order bits as
needed to encode DBL_MANT_DIG digits of the floating point radix are
significant in the integer value.
2) I assume that a...

**Comparing Floating Point Values**I was wondering if there was a convention for comparing 2 floats
dealing with significant digits. For example, if I had 2 variables (x
and y) and wanted to see if they were equal in an if statement, is
there a standard way to do a compare based on "x" significant digits?
Thank you.
markp wrote:
> I was wondering if there was a convention for comparing 2 floats
> dealing with significant digits. For example, if I had 2 variables (x
> and y) and wanted to see if they were equal in an if statement, is
> there a standard way to do a compare based on "x" significa...

**Floating point formats not linked**Is there anything wrong with this program?
#include <stdio.h>
int main()
{
struct emp
{
char name[20];
float sal;
};
struct emp e[1];
int i;
for (i=0;i<=0;i++)
scanf("%s %f",e[i].name,&e[i].sal);
for (i=0;i<=0;i++)
printf("%s %f",e[i].name,e[i].sal);
return 0;
}
--
main(){char s[37]="CSbwjAjocpy/mw!PS!sbwjAeftqbnnfe/dpn";
int i;for(i=0;i<36;putchar(s[i++]-1));return 0;}
"Ravi" <ravi@despammed.com> wrote in message
>
> Is t...

**summerize floating point values**Hello,
I calculate some values with the fp package and I woudl like to
summerize the values.
My first try was a counter like
\newcounter{mysum}
\setcounter{mysum}{0}
\newcommand{\sum}[1]{
\FPeval\val{#1 * 0.5}
\FPtrunc\ret\val2
\addtocounter{mysum}{\ret}
}
but this does not work. My next try was a scale with 100 to the \ret
value, so that I get only int values,
but this does not work also.
I would like to summerize my fp values in a global variable, how can i do that?
Thanks
Phil
...