Finding every possible "nonduplicate" combination given a set of 6 digits 
Following code would display the combination for 4,5,6. You can change to
include what ever value
for (var i = 4; i < 7; i++)
for(var y = i; y < 7 ; y++)
for(var z = y ; z < 7; z++)
$('#result').append('<div>' + i + '' + y + '' + z +
'</div>');
IS this what you want. JSFIDDLE

How to compare doubles with 5 digits of precision? 
1.000001 when limited to the usual 64bit IEEE floating point
representation is actually 1.0000009999999999177333620536956004798412.
Likewise 1.000002 is actually 1.0000020000000000575113290324225090444087.
The two are ever more slightly apart than 0.000001.
You can use a very slightly larger comparison value to catch this:
const double epsilon = 0.0000011;
It really isn't possible to completely eliminate any rounding problems with
floating point numbers.

Java: double: how to ALWAYS show two decimal digits 
Use the java.text.NumberFormat for this:
NumberFormat nf= NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
nf.setMinimumFractionDigits(2);
nf.setRoundingMode(RoundingMode.HALF_UP);
System.out.print(nf.format(decimalNumber));

(C++) std::istringstream reads up to 6 digits from string to double 
The precision of your output probably just isn't showing all of the data in
number. See this link for how to format your output precision.

Format a double to two digits after the comma without rounding up or down 
Math.Truncate(value * 100)/100
Although I make no guarantees about how the division will affect the
floating point number. Decimal numbers can often not be represented
exactly in floating point, because they are stored as base 2, not base 10,
so if you want to guarantee reliability, use a decimal, not a double.

Separate double number larger than 10 digits in Java 
Perhaps you could use java.lang.Math.floor(double) for the integer part,
and then subtract that from the original number to get the fractional part.
(If that doesn't do what you want for negative numbers, then use
Math.ceiling(double) for the integer part when the number is negative.)

how to place a "double" formated to 6 decimal digits into a QString? 
This is what I did to get 888888.888888:
for(int i; i < m_iBuild; i++){
out << QString::number(dLog[i]  dLog[0], 'f', 6) <<
" " << msgList.at(cLog[i]) << "
";
}

c# double value displayed as .9999998? 
According to the CLR ECMA specification:
Storage locations for floatingpoint numbers (statics, array elements,
and fields of classes) are of fixed size. The supported storage sizes
are float32 and float64. Everywhere else (on the evaluation stack, as
arguments, as return types, and as local variables) floatingpoint
numbers are represented using an internal floatingpoint type. In each
such instance, the nominal type of the variable or expression is
either R4 or R8, but its value can be represented internally with
additional range and/or precision. The size of the internal
floatingpoint representation is implementationdependent, can vary,
and shall have precision at least as great as that of the variable or
expression being represented. An implicit widening conve

shift and rotation in matlab for handwritten digits 
Let I be your image.
%I = Input image;
J = imrotate(I,30); %To rotate
JS = [zeros(size(J,1),10), J]; %To shift 10pix horizontally
figure,imshow(I)
figure,imshow(J)
figure,imshow(JS)

Regular expression for Less or more than 9 digits Repeating digits for first 5 or all 9 digits and only number? 
By your last comment, you need a regex to validate a string of maximum
length 9 containing digits only:
^[09]{1,9}$
This will validate any string containing digits, with length at least 1 and
not greater than 9.
If you want to avoid strings such as 098 (leading zeroes), use this
instead:
^[19][09]{0,8}$
EDIT: If I understand your question well now, you can use this regex:
^(?!([09])1111)[09]{3}[09]{2}[09]{4}$
That is assuming that echosign can handle callbacks, if not, you can use
this instead:
^(?!(?:11111222223333344444555556666677777888889999900000))[09]{3}[09]{2}[09]{4}$

Double being displayed with unnecessary zeros after decimal 
As mentioned in the [NSString stringWithFormat:] class reference:
Parameters
format A format string. See “Formatting String Objects” for
examples of how to use this method, and “String Format Specifiers”
for
a list of format specifiers. This value must not be nil.
and following the first link, one of the first examples is:
NSString *string1 = [NSString stringWithFormat:@"A string: %@, a float:
%1.2f",
@"string", 31415.9265]; //
^
// string1 is "A string: string, a float: 31415.93"
You need to learn to think for yourself. Read the documentation!

How do I compare the display layout of two pivot tables displayed next to each other 
Based on Excel 2007, copy your two PivotTables and Paste Special values
somewhere convenient. You will lose the drill down facility and the ability
to choose different views (without going back to your originals) but should
be able to insert cells to align rows to suit.

error: cannot convert 'double (evaluator::*)(double, double)' to 'double (*)(double, double)' in assignment 
This:
double (*ope)(double, double);
should be:
double (evaluator::*ope)(double, double);
// ^^^^^^^^^^^^
because you are using a pointer to member.

sql server 2008 r2 compare int with double 
Try this one 
ALTER PROCEDURE dbo.getRestaurantNear
(
@lat INT
, @lon INT
)
AS BEGIN
SET NOCOUNT ON;
SELECT
ID
, restaurantID
, [description]
FROM dbo.RestaurantAddressMap
WHERE ROUND(lat, 0) = @lat
AND ROUND(lon, 0) = @lon
END

compare double in hibernate criteria 
You should use Double instead of double in the mapped class.
private Double ball;
It will be useful if you have NULL in the database as well.

How to implement double compare and swap in C/Linux? 
I don't know of any CAS operations that work on two distinct memory
locations. However, it's possible the paper is using a struct for the
pointer and counter as a workaround to treat both fields as a larger type,
and therefore, change both atomically.
Assuming you have a struct of two fields, a pointer and a counter: pointer
size of 4 bytes, counter size of 4 bytes; properly aligned without padding
to a struct size of 8 bytes. Assuming you also have a CAS operation that
handles values of 8 bytes (such as a pointer to a 64bit integer). You can
prepare the struct values separately, and use the CAS operation on the
struct as a whole to change two values at once.

Why does time difference measurement with `std::chrono` give more significant digits with `float` type, compared to `double` type? 
You want to read up about binary floating points and precision! float has 6
decimal digits of precision, double has 16 decimal digits of precision (I
think but I keep misremembering the exact values; check
std::numeric_limits<T>::digits10). Since binary floating points can't
representation fractional decimal values exactly (only some but many not),
printing the binary floating point values causes some rounding when leaving
the printing routine to do what it wants to do. When you ask for more than
digits10 digits, the rounding will generally be put off and it prints the
actual binary fractional value up to whatever number of digits you asked
for.
In the case you described above the float version just starts printing the
actual values (which can have up to std::numeric_limits<T>

How to Compare two Chanel s in Matlab 
The way you have defined s1 and s2, it is not possible for the signals to
be equal.
Should you still want to test with matlab, however, and assuming you know
nothing a priori about the signals, FFT both (as explained in my answer to
your previous question here), and compare the frequency and amplitude of
the peaks (and if you wish, phase).

Does clang support a doublewordcompareandexchange operation? 
The issue here is that SOME models of 64bit processors do not have a
cmpxchg16b. The mcx16 tells the compiler that "I know that this processor
supports the cmpxchg16b instructions, so you can generate it". This is to
avoid problems with older 64bit processors which don't support this
instruction  they would then cause an "illegal opcode trap". It's the same
thing as using for example SSE4.

Duplicate photo searching with compare only pure imagedata and image similarity? 
You can remove exif data with mogrify strip from ImageMagick toolset. So
you could, for each image, copy it without exif, md5sum, and then compare
md5sums.
When it comes to visually similar messages  you can, for example, use
compare (also from ImageMagick toolset), and produce black/white diff map,
like described here, then make histogram of the difference and check if
there is "enough" white to mean that it's different.

Avoid duplicate activity or fragment due to multitouch or double tapping? 
I have solved it by adding this to our parent Activity class:
private Intent mActivityStarted = null;
[...]
@Override
public void startActivity(Intent intent) {
if (mActivityStarted == null  mActivityStarted == intent) {
mActivityStarted = intent;
super.startActivity(intent);
}
}
@Override
public void startActivityForResult(Intent intent, int requestCode) {
if (mActivityStarted == null  mActivityStarted == intent) {
mActivityStarted = intent;
super.startActivityForResult(intent, requestCode);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent
data) {
mActivityStarted = null;
super.onActivityResult(requestCode, resultCode, data);
}
I also added this in our parent Fragment class and it share

How does matlab compare two complex numbers? 
The complex numbers are compared first by magnitude, then by phase angle
(if there is a tie for the maximum magnitude.)
From help max:
When X is complex, the maximum is computed using the magnitude
MAX(ABS(X)). In the case of equal magnitude elements, then the phase
angle MAX(ANGLE(X)) is used.
NaN's are ignored when computing the maximum. When all elements in X
are NaN's, then the first one is returned as the maximum.

compare multiple matrices matlab 
edit
As I did not know about the second argument of the maxfunction, here is
what you should NOT use:
old
Well, quick&dirty:
x=[2 5 8];
w=max(x)
[~,loc] = ismember(w,x)

How to vectorize double loop in Matlab? 
You are probably looking for the meshgrid function. It is designed to fill
in the sort of m by n combinations that it looks like you need. For
example:
>> m = 1:4;
>> n = 1:3;
>> [mGridValues, nGridValues] = meshgrid(m,n)
mGridValues =
1 2 3 4
1 2 3 4
1 2 3 4
nGridValues =
1 1 1 1
2 2 2 2
3 3 3 3
This is a little more complicated since your inner loop depends on the
value of your outer loop. So you will need to mask out the undesired [n,
m] pairs (see below).
Modifying the prototype code that you have provided, you would end up with
something like this:
[mValues, nValues] = meshgrid(0:variable, 0:variable); %Start with a full
combination of values
mask = mValues

Double sqrt solution in Matlab? 
The docs don't say anything specific about always only providing the
positive square root but it does seem like a fair assumption in which case
you can get the negative square pretty easily like this:
p = sqrt(1cos(a)^2);
n = sqrt(1cos(a)^2);
btw assigning to sin(a) like that is going to create a variable called sin
which will hide the sin function leading to many possible errors, so I
would highly recommend choosing a different variable name.

Vectorizing double for loop in Matlab 
Pairwise Euclidean distance using pdist, which does the heavylifting in C,
and squareform to create the distance matrix:
d = squareform(pdist(A.'));
If you need this to be even faster (365by365 is not very big though), see
my answer here or try this File Exchange program.

Why is find in matlab returning double values 
I can only guess, but probably because a wide range of functions only
support double. Run
setdiff(methods('double'), methods('uint32'))
to see what functions are defined for double and not for uint32 on your
version of MATLAB.
Also there is the overflow issue with integer data types in MATLAB that can
introduce some hard to detect bugs.

Record video with web cam and get first frame of that and compare it with next frames in matlab 
imread is used to read a file from a folder which is already in a
particular compressed or uncompressed format. In your case, you have raw
data, on which you can perform operations. So, try using:
camfrm1 = rgb2gray(camfrm1);
This should work.
There is a second typo:
bt = abs(double(camfrm2)double(camfrm1));

How to Convert Persian Digits in variable to English Digits Using Culture? 
You need to parse them first, using e.g. Int32.Parse() with the correct
cultural specifier. Once you have it as a plain integer, it's simply a
matter of calling ToString() on it, again with the correct cultural
specifier.
An alternative solution is to walk the string character by character and
just replace any character that is a Persian digit with the corresponding
(west) arabic numeral. Other characters can then be preserved asis, if
required.
If the string really contains a number, you should go with the integer
parsing method. If it is not just a number, but really a phone number,
serial number etc, you might need to use the replacing algorithm instead.

Computing float to 2 digits only (not formatting/rounding off 6 digits after decimal to 2) 
There is nothing you can 'tell' math.h (in this regard); float does not
have precision options.
If you want less computational intensive calculations you must use other
types or methods.
You already mention the best candidate: fixedpoint. But, for obscure
reasons, you say that you can't use it.
Other idea is to scale up your calculations by for example a factor 10,000,
and keep everything as int (or longer). Then, only scale down to float
when needed. But of course, it depends on your problem if you can do this.

matlab Conversion to double from cell is not possible error message 
You can probably fix it with this:
plot(datenums,[everglades_precip_data{:}]);
or this:
plot(datenums,cell2mat(everglades_precip_data));

data type to store precision more than double in matlab 
It appears that matlab only uses 64bit doubles, but you might have luck
with one of the arbitrary precision libraries available for matlab.

Regular expression match aalphanumeric&bdigits&cdigits 
you can use this pattern :
^(?i)a([09az]++)&b([09]++)&c([09]++)$
In the case what you try to match is not the whole string, just remove the
anchors:
(?i)a([09az]++)&b([09]++)&c([09]++)
explanations:
(?i) make the pattern caseinsensitive
[09]++ digit one or more times (possessive)
[09az]++ the same with letters
^ anchor for the string start
$ anchor for the string end
Parenthesis in the two patterns are capture groups (to catch what you want)

Why is a double always 8 bytes and an int always 4 bytes, even if the int has more digits? 
These primitive datatypes need to be defined somewhere for you to use them.
It is not a flexible container where you can stuff in whatever you want,
rather more like a bottle which takes the same space no matter if full or
empty. And they also have a maximum they can contain.
Read more yourself here.

How to Combine groups of duplicate and repeating values and preserving order? Matlab 
You can use a derivative to find fluctuations in your data arrays, which
would indicate a change in grouping. Anywhere where the derivative is not
0, there is a change, either positive or negative. Find where these changes
occur, and then grab the corresponding indices. Something like below.
data = [1;1;1;2;2;2;3;3;3;4;4;4;4;4;3;3;2;2;2;2;1;1;1;1;4;4;4;4;];
change = diff(data)~=0;
indices = [1,find(change)'+1];
compressed = data(indices)';
and the result will be
compressed =
1 2 3 4 3 2 1 4
And of course you can use the indices variable for whatever you need as
well.
Note
On the third line, we add index 1 because technically the start of the
array is a change, and then we add 1 to the find command because we are
using find on the derivative, so the r

Matlab Undefined function or method 'C' for input arguments of type 'double' 
You've to do either of following
a) pass C as argument to function simps()
OR
b) evaluate C from workspace
C = evalin( 'base', 'C' );
inside the function before its use.
Also, use of eval and evalin is generally discouraged as it makes your code
harder to follow and reuse.
Tip :
You may want to combine both like following
function simps(C)
if nargin == 0
C= evalin( 'base', 'C' );
end
% Your code

remove last 14 digits from string, if there are digits 
this?
$filename =
"datac(festo1small1);dividerbin1.4.4;dividerconf1.3.3w(1,16);storagebin1.5.4;storageconf1.5.0w(1);workerbin4.5.1;workerconf4.4.1c(festo1)win1_20130620123306"
$filename replace 'd{14}$'

Display more digits of pvalue digits from adfTest when pvalue<0.01 
I don't know much about the command you're running, but I looked through
the adfTest function and it looks like the do approximation of the pvalue
based on the approx function and a table of critical values, which means
that they can't report PValues < 0.01.

Can a unit test perform doubleduty by accepting a boolean value as a switch, or should I write two separate tests that duplicate the test code? 
I don't like this. Here's why: your test method names should reflect the
method under test, what the preconditions of the test are, and what you
expect the result of the test to be:
public bool AddCustomer_CustomerIsValid_ShouldReturnTrue()
public bool AddCustomer_CustomerIsInvalid_ShouldReturnFalse()
Now if you want to, you can refactor the core testing logic into its own
method to eliminate the code duplication, and then call that method from
the two above methods. But the refactored method is not a test case; it's
just a helper method for the actual test cases.
Example:
[Test]
public void AddCustomer_CustomerIsValid_ShouldReturnTrue()
{
var result = AddCustomerTest(true);
Assert.IsTrue(result);
}
[Test]
public void AddCustomer_CustomerIsInvalid_ShouldReturnFalse()
{

show 2 digits max after floating point ... only if it is a float number with more than 2 float digits 
I think there is no such short bypass for it.
Manually check if it has 2 or more digits after decimal.
How to know if it has less one or zero digits after decimal ? Just multiply
with 10 and check if it is an integer. If it is, print the number as it is.
If it's now use '%.2f' to print it.
