'exact' numerical value after numerical optimization MATLAB 
You're trying to store/use a number that cannot be represented exactly in
an IEEE754 64bit doubleprecision floating point number.
I'm not sure how you got that number without using vpa() in the first
place, since 64bit double is Matlab's maximum of precision...
You could use the multiple precision toolbox by Ben Barrowes, or HPF by
John d'Errico, also from the FEX. You'll have to convert/construct to/from
string if you want to store/load it to/from file.
But I have to agree with John's comment there:
The fact is, most of the time, if you can't do it with a double, you
are doing something wrong
so...why exactly are those 32ormore digits important?

Summing text inputs in which the number of inputs changes based on a for loop 
You'll have to examine all input elements and examine their name, checking
for the prefix "hous". For example:
var sum = 0;
var elts = document.getElementsByTagName('input');
for( var i=0; i<elts.length; i++ ) {
var elt = elts[i];
if( elt.id && elt.id.indexOf( 'hous' ) === 0 ) sum += Number(
elt.value );
}
console.log( sum );
This solution doesn't need jQuery. See it in action here:
http://www.codepen.io/anon/pen/xmrGu

Python UserDefined Global Variables Across Modules: Issues calling them when other modules are run 
Running a module as a script does not count as importing it as a module.
When the Functions_Practice_Main.py script imports Functions_Practice, and
Functions_Practice imports Functions_Practice_Main, Python doesn't care
that the code in Functions_Practice_Main.py is already running as the main
script. Python will run it again to produce the module.
How do you fix this? Well, there are several things you should do. First,
avoid circular imports if at all possible. Instead of having
Functions_Practice import Functions_Practice_Main, pass any data
Functions_Practice needs from Functions_Practice_Main as function
arguments.
In Functions_Practice_Main:
Functions_Practice.interactive_remainder_test(name)
In Functions_Practice:
def interactive_remainder_test(name):
number = inputData(na

Including admin parts in modules(bundles) in symfony2 ansd calling them from other modules and templates 
I think you misunderstood what Symfony2 offers you. I'll try to explain
some of them for your use case.
What I understood
You want to create an admin panel on your website. It's a common case.
What to do
You should create a bundle for this whole content. Like AdminBundle
Step by step
Let's look at a Symfony2 directory structure. Here's an excerpt.
project/
app/
config/
config.yml
parameters.yml
cache/
AppKernel.php
src/
Acme/
DemoBundle/
Controller/
Resources/
config/
public/
views/
AcmeDemoBundle.php
vendor/
symfony/
autoload.php
web/
.htaccess
app.php
a

Ambient declations for javascript modules that add fields to interfaces in other modules 
If the item you are extending is an interface, they are open in TypeScript,
so you can just add the extras like so:
interface ExpressServerRequest {
myAdditionalThing(): void;
}
There are ways of declaring pretty much anything, so if this isn't the
trick for your case just post the exiting ExpressServerRequest and I'll
update the example. The version of express.d.ts I checked on Definitely
Typed has ExpressServerRequest as an interface.

Configuring AngularJS modules  how does it affect the other modules in the app? 
Here is what i think. Like any other angular $httpProvider is also
singleton in nature which very well means any changes to it from any where
including any module would affect other, or in other words changes are
global.

What does it mean to have modules inside other modules in Ruby? 
It is essentially namespacing. You could do the same thing with just module
Fabrication::Syntax::Make. For whatever reason, nesting them is what most
wellknown gems/projects do, and for that unknown reason I do too. I would
love to get some insight as to why people generally prefer nesting over the
more direct method.

Getting numerical value from edit box in MATLAB 
You can get the value of the edit box with
S = get(editBoxHandle, 'string');
If it's a numerical value, then convert it
N = str2num(S);
If you want to have only the digits within a string mixing letters and
numbers, this code
S = '123abc456xyz';
N = cell2mat(regexp(S, 'd+', 'match'));
disp(N)
gives N=123456 (from this SO answer).

constraint on all numerical tables 
You would need to create a separate constraint for each column in each
table. You could potentially write a bit of dynamic SQL for this
DECLARE
l_sql_stmt VARCHAR2(1000);
BEGIN
FOR x IN (SELECT *
FROM user_tab_columns
WHERE data_type = 'NUMBER'
AND table_name in (SELECT table_name
FROM user_tables
WHERE dropped = 'NO' )
LOOP
l_sql_stmt := 'ALTER TABLE '  x.table_name 
' ADD CONSTRAINT chk_'  x.table_name  '_' 
x.column_name 
' CHECK( '  x.column_name  ' > 0)';
EXECUTE IMMEDIATE l_sql_stmt;
END LOOP;
END;
For every numeric column in every table in the current schema, this will
attempt to create a check c

Git expects numerical timeout? 
If something related to GitHub suddenly stop working, then it is probably
linked to its status.
6:24 UTC A small percentage of repositories are currently unavailable
while we perform maintenance.
If it does persist though, then it could be related with some local
configuration issue.
For instance, check git status and git branch, making sure you are on a
branch, and not in a detached HEAD mode.
If git status mentions files to be committed (ie they have been added to
the index but not yet registered ion a commit), do a git commit after your
git add.
If git branch doesn't return anything, then you need to follow "Git: How
can I reconcile detached HEAD with master/origin?"

Meaning of a numerical ErrorMessage 
cout << "MTB Error: " << message <<":"<<(unsigned
int) e>Error()<< endl;
cout isn't very good at displaying Unicode strings, it merely displays the
string pointer value. Not useful of course, use wcout instead. And favor
displaying the error code in hex. 0x80040154 is a very common COM error,
"Class not registered". Thousands of questions about it already, you just
need to get the COM server registered properly. Ask the vendor or author
if you don't know how to do that.

Converting Text Field to Numerical Value (Getting NaN) 
val returns a string. Now, the way you're using those variables, they'll
get automagically converted to numbers (although it's best practice to
parse them yourself).
One or the other of your values has a character in it that prevents the
value from being automatically converted to a number; and then since that's
NaN, any math involving it will be NaN. If you examine AmtX and AmyY in
Firebug before using them, you should see whatever that character is.
Again, parsing isn't the actual problem here, but you're using parseInt in
exactly the wrong place (unless you were trying to use it to truncate the
fractional portion of the number, in which case there are better choices).
Here are the right places:
var AmtX= parseInt($('#Apply_RequestedAdvanceAmtX_r').val(), 10);
var AmtY= parseInt($("#A

SAS Group by numerical value or convert to char 
You're not getting distinct entries because it is ignoring your group by,
because you didn't ask for any summary functions. SAS does not permit
group by without a summary function (ie, sum(something) or count(something)
or whatever), it converts it to order by. There's no explicit reason
numeric wouldn't work for grouping.
This is noted in the log with a NOTE, by the way.
You can use distinct, as you suggested in the comments:
proc sql;
select distinct username, customercode from have;
quit;
That will give you a list of all username/customercode combinations.
If you wanted to format it, you have to remove the $  the $ in format does
not mean "make this a character", which is what all formats do; it means
"the original value preformat was a character value".
proc sql;
create

Sorting strings with numerical digits in it 
You can e.g make struct like this
struct combined{
string alph;
int numeral;
};
put these in a c++ standard container
and use the sort of algoritm with a user defined compare object.

How to make numerical field name CLS compliant? 
Ok, then try this.
Open the xsd file.
Right click on the table.
Select configure.
Assign an alias in the select statement.
Update report.
This link might help u out

Numerical precision for difference of squares 
The most precise way with floats is likely to compute both sin and cos
using a single x87 instruction, fsincos.
However, if you need to do the computation manually, it's best to group
arguments with similar magnitudes. This means the second option is more
precise, especially when cos_theta is close to 0, where precision matters
the most.
As the article
What Every Computer Scientist Should Know About FloatingPoint Arithmetic
notes:
The expression x2  y2 is another formula that exhibits catastrophic
cancellation. It is more accurate to evaluate it as (x  y)(x + y).
Edit: it's more complicated than this. Although the above is generally
true, (x  y)(x + y) is slightly less accurate when x and y are of very
different magnitudes, as the footnote to the statement explains:

Setting nonnumerical list values 
Actually li elements only accepts integers in their value attribute, so
it's not possible solely through li's.
Depending on your layout you could simply remove the liststyle and prepend
your own 'value' in a span before the rest of your content.

Formula to get the first cell with a numerical value from a selection? 
You can simplify the last number formula by using LOOKUP, i.e.
=LOOKUP(9.99999999999999E+307,B:B)
and for the first number try this
=INDEX(B:B,MATCH(1,INDEX(ISNUMBER(B:B)+0,0),0))

Numerical Integration; CUDA development 
If I understand your problem correctly, you want to do numerical
integration with multiple (1024) sets of inputs (a,b,c), and for each
integral you need N subintervals. Let's call the number of sets of inputs
M.
If N is large enough (let's say > 10000) the first kernel sample you pasted
could be good enough (invoking it M times for different set of inputs).
Whether or not it utilizes all available device throughput depends on how
complex your function is.
I didn't get what exactly you do with the d_arr[] array? Normally for
numerical integration you would want to sum it. Right? Are you summing up
the results on CPU? Consider using atomicAdd (esp. if you are going to run
your kernel on compute cap 3.0 and above gpus) or a parallel scan if you
find atomicAdd not fast enough.
If N is sm

Join two queries and use for numerical division 
This should do it.
SELECT
SUM(TIME_TO_SEC(TIMEDIFF(od.created_at, oc.created_at))) /
COUNT(*) AS `sec_per_call`
FROM on_connected oc
JOIN on_disconnected od ON od.call_id = oc.call_id
WHERE oc.ext_num = 3205006
You don't need two subqueries, because the criteria in both are the same.
You just need to divide the two aggregates.
Also, count(TIME_TO_SEC(TIMEDIFF(od.created_at, oc.created_at))) doesn't
really make sense. The COUNT() function just counts nonnull values,
there's no need to do complicated conversions like TIMEDIFF and TIME_TO_SEC
in there. If you just want to know the number of calls, it's just the
number of matching rows, which is COUNT(*).
Actually, it can be simplified further. SUM/COUNT is just the average, and
SQL has a builtin AVG function:
SELECT AVG(TIME_TO_SE

How do I search for documentation on numerical macros? 
Google limits.h.
Even better, look up this file on your system.
Then, in Xcode (and other IDEs) codecompletion is your friend; just start
to type "int" and you'll see the list: INT16_MAX, INT16_MIN, ... On Xcode
(in iOS project) I did not have to explicitly #include <limit.h> but
you may have to do this first on other IDEs.

sorting text data (like numbers) so the numerical value is followed 
If you are using MySQL, you can do:
order by field+0, field
MySQL automatically does a conversion of the leftmost characters in a
string for an arithmetic operation.
In other databases, this seems to be more difficult. In some, you can use
REGEXP to replace a pattern (such as removing all characters after the
first nondigit). Or, you might have to loop through the characters
themselves, with something like:
order by (case when left(field, 5) not like '[^09]' then cast(left(field,
5) as int)
when left(field, 4) not like '[^09]' then cast(left(field,
4) as int)
when left(field, 3) not like '[^09]' then cast(left(field,
3) as int)
when left(field, 2) not like '[^09]' then cast(left(field,
2) as int)
when left(field, 1) n

Rails Omniauth, set a numerical value only on first model creation 
That's what first_or_initialize is!
From Rails docs
# Find the first user named Scarlett or create a new one with a particular
last name.
User.where(:first_name => 'Scarlett').first_or_create(:last_name =>
'Johansson')
# => <User id: 2, first_name: 'Scarlett', last_name: 'Johansson'>
# Find the first user named Scarlett or create a new one with a different
last name.
# We already have one so the existing record will be returned.
User.where(:first_name => 'Scarlett').first_or_create do user
user.last_name = "O'Hara"
end
# => <User id: 2, first_name: 'Scarlett', last_name: 'Johansson'>
find_or_create is complementary to first_or_initialize, the former persists
the object. source

Add email and numerical validation to jquery form 
Check out this answer for validating your email field Email validation
using jQuery
Check out this answer for Zip Code validation ZIP Code (US Postal Code)
validation
To output to bootstrap warning message put something like the following
instead of your alerts...
$(body).prepend('<div class="alert alertblock alerterror fade
in"><a class="close" datadismiss="alert"
href="#">×</a>You need to tell us something! Please
enter your message!</div>');

Give key names to an array with numerical keys 
The answer here is to use array_combine($keys, $values);
Note that the function will fail if the number of elements in the $keys and
$values array are different.

Why am I getting an error when trying to convert "numerical" degrees to DMS using dd2dms()? 
Your data might have some nonnumeric entries buried somewhere, eg strings
like "NA" or whatever. When R sees them, it assumes the whole column is
character, which is probably then being converted into a factor.
Note that:
mode(f) for a factor f is numeric (since factors are internally stored as
numbers). You want class(f).
if x is a primitive vector, then sapply(x, mode) is needlessly complex. You
want just mode(x).

Numerical Integral of large numbers in Fortran 90 
This is probably an extended comment rather than an answer but here goes
anyway ...
As you've already observed Fortran isn't equipped, out of the box, with the
facility for handling such large numbers as e^2000. I think you have 3
options.
Use mathematics to reduce your problem to one which does (or a number of
related ones which do) fall within the numerical range that your Fortran
compiler can compute.
Use Mathematica or one of the other computer algebra systems (eg Maple,
SAGE, Maxima). All (I think) of these can be integrated into a Fortran
program (with varying degrees of difficulty and integration).
Use a library for highprecision (often called either arbitrayprecision or
multipleprecision too) arithmetic. Your favourite search engine will turn
up a number of these for you,

Numerical Gradient in Matlab  Rounding Issues 
If you work out the gradient of that Wolfe function, you come up with:
if x<=0;
dfx = 9  81*x.^8;
dfy = 16*sign(y);
elseif x>=abs(y);
dfx = 5*0.5./sqrt(9*x.^2 + 16*y.^2)*9*2.*x;
dfy = 5*0.5./sqrt(9*x.^2 + 16*y.^2)*16*2.*y;
else
dfx = 9;
dfy = 16*sign(y);
end
So as you can see, the second component of the gradient for x<=0 is
16*sign(y), thus it is zero when y==0, +16 otherwise.
BTW, it doesn't look like the exact minimum lies at [1 0], but rather at
[0.7598 0]
= [(1/9)^(1/8) 0]

Show / Hide Multiple divs with out using a numerical value 
You can add custom data attribute like datavalue like this 
Html : (same for other options)
<option datavalue='6' value="apatient6">6</option>
Js :
$(document).ready(function () {
$('.formbox').hide();
$('#additional').change(function () {
$('.formbox').hide();
for (i = 1; i <=
parseInt($('option:selected',this).data('value')); i++) {
$('#workshop' + i).show();
}
});
});
Demo > http://jsfiddle.net/PayBt/8/

Differences in numerical behaviour between Scala versions 
Sorry, can't post just a comment yet.
What is the magnitude of the differences you're seeing, and what kind of
calculation are you doing in your code? It may not be meaningful to ask
which is correct, it's FP, after all. Could you try compiling your code
with strictfp? Slight differences in code gen and optimization can result
in differences in when/how often 80bit intermediates are truncated to 64
 assuming you're running on an x86 architecture. If you have access to
hardware that doesn't have 80bit fp registers you might try running both
versions on that. Even then, simple expressions like LL + S1 + S2, where
LL is much greater than S1 or S2, can give different results depending on
the order of the adds.

Numerical integration when variable is lower limit 
This is a more mathematical solution, but
( int_1^0 f(t) dt ) + ( int_0^x f(t) dt )
is equivalent to the negative of
int_x^1 f(t) dt
Thus, if you are able to find int_0^x f(t) dt, you should be ablue to find
what you seek.
Hopefully that helps.
(Excuse any syntax errors, I am not familiar with the syntax. This is meant
to be a mathematical solution, there may be better programmatical
solutions)
EDIT: As clarification, this was noted in a comment above (thanks to @Rody
Oldenhuis for the clarification):
"I believe it's a consequence of the fundamental theorem of calculus [FTC]
that for any realvalued function f and limits a and b, int(f, a,b) ==
int(f, b,a). So indeed, ... use flipud or fliplr on your f, find the
limits and use cumtrapz, and don't forget the negative sign :)"
In

numpy gradient function and numerical derivatives 
In np.gradient you should tell the sample distance. To get the same results
you should type:
plt.plot(x1,np.gradient(y(x1),1),'ro')
plt.plot(x2,np.gradient(y(x2),0.1),'bo')
plt.plot(x3,np.gradient(y(x3),0.01),'go')
The default sample distance is 1 and that's why it works for x1.
If the distance is not even you have to compute it manually. If you use the
forward difference you can do:
d = np.diff(y(x))/np.diff(x)
If you are interested in computing central difference as np.gradient does
you could do something like this:
x = np.array([1, 2, 4, 7, 11, 16], dtype=np.float)
y = lambda x: x**2
z1 = np.hstack((y(x[0]), y(x[:1])))
z2 = np.hstack((y(x[1:]), y(x[1])))
dx1 = np.hstack((0, np.diff(x)))
dx2 = np.hstack((np.diff(x), 0))
d = (z2z1) / (dx2+dx1)

Numerical derivatives of an arbitrarily defined function 
Install and load the numDeriv package.
library(numDeriv)
f < function(x) {
a < x[1]; b < x[2]; c < x[3]
sin(a^2*(abs(cos(b))^c))
}
grad(f,x=1:3)
## [1] 0.14376097 0.47118519 0.06301885
hessian(f,x=1:3)
## [,1] [,2] [,3]
## [1,] 0.1422651 0.9374675 0.12538196
## [2,] 0.9374675 1.8274058 0.25388515
## [3,] 0.1253820 0.2538852 0.05496226
(My example is trivariate rather than bivariate, but it will obviously work
for a bivariate function as well.) See the help pages for more information
on how the gradient and especially Hessian computations are done.

Overloading comparison for double to allow for numerical error 
No, you cannot overload operators for builtin types.
No, changing the semantics of operators is (in general) not a good idea.
You could either:
Use comparisonfunctions (as you suggest yourself).
Write a wrapperclass around a double member that has the operators you
want.

Plot numerical string values in matplotlib 
edit:
My matplotlib 1.2 can plot the string lists fine btw, there is no need for
conversion to begin with, just plot them as they are.
You can first convert them to a float32 Numpy array:
x = ['1.34511','0.0234','0.0890']
y = ['0.0987', '0.8763', '0.0762']
x = np.array(x, dtype=np.float32)
y = np.array(y, dtype=np.float32)
plt.plot(x,y)
Or use list comprehension to convert the values to a float:
x = ['1.34511','0.0234','0.0890']
y = ['0.0987', '0.8763', '0.0762']
x = [float(val) for val in x]
y = [float(val) for val in y]
plt.plot(x,y)

Is there a C# mathematics framework that can do numerical indefinite integration? 
The indefinite integral is a family of functions, "F(x)+C", where F is any
particular solution. Given a procedure for calculating a definite integral
of f in any interval, you can pick F(x) as the definite integral from any
abscissa to x.
Given a way to calculate the definite integral of f in an interval, the
indefinite integral function F that passes through the constraint point
(u,v) is:
F(x) = definite_integral(f, u, x) + v;
On the other hand, if you want to avoid recalculating the integral for
every point what you are actually looking for is a routine for solving the
ordinary differential equation F'(x) = f(x) with the given constraint. Any
decent library of numerical analysis should have several functions for
solving ODEs.

Input string does not match a numerical range 
The input you get from gets is always a string, so it will never match a
number range. To convert it to an integer, do this:
cost = gets.to_i
You can directly put it in case statement like so
case gets.to_i

Appropriate type for storing numerical data and be able to interpolate 
You want to use sorted lists of XY pairs
(List<Tuple<double,double>> would be an appropriate type for
this). Let's assume you have two input lists, series1 and series2, which
are sorted by X value, and you're checking series2 (and possibly
interpolating) for the X values present in series1 (just as you state in
the question). Because you need to check every coordinate in series1,
there's a minimum complexity of O(n).
The key to keeping this efficient is the fact that the lists are ordered,
which means you don't have to search the entire series2 list for each X
value in series1. You do this by keeping a pointer to the current item in
series2, and moving it as you traverse series1. Here's pseudoC# to show
what I mean.
var s2idx = 0;
foreach(s1 in series1)
{
// go forward

TeachingDemos: using etxtPlot with numerical results in loops 
The reason that is happening is because it is assumed that you do not want
the etxtPlot command to show up in the transcript or command history, so
when that function is called it sets a variable that tells the workhorse
internal function (that is called by the task manager) to skip outputting
the commands and results temporarily. This works correctly outside of a
loop because the suppression of the output only lasts for the call to
etxtPlot and everything else is properly output. The problem comes when
you do this in a loop, everything done in the loop is processed in a single
step (see ?addTaskCallback for the details on how things are handled), so
the suppressing of the command and output from etxtPlot ends up also
suppressing the commands and output from everything else in the loop.

How to set a nvd3 axis to use strings instead of numerical values ? 
You can pass in a format function that returns label. This is an API of
d3js.
var x_format = function(num) {
if (num === 2.3)
return "A";
else if (num === 5.6)
return "B";
else if (num === 45.2)
return "C";
};
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom")
.tickFormat(x_format);
Check out this example that I make for scatterplot.
http://vida.io/documents/jSGz9TQEmzwMqQzhs
{(A, 2.3), (B, 5.6), (C, 45.2) }
Update: my answer with fixed value.
Update: hybrid combination between line, bar, scatterplot:
http://vida.io/documents/fN5FjsYaHaJSXEjz7
