When using ISR, can I choose the address I will return to as the address I have determined instead of the address I stay? In this way, I can override the interrupt logic, make an instant interruption and determine the return location myself.
Tag: functions
functions – Order column custom date using pre_get_posts
How I want to sort my custom column contain string date with format j F Y
my column data contains string example “21 januari 2021”, how I can change the format to date so I sort it.
My value from postmeta with meta_key “datepicker”.
here my code:
add_action( 'pre_get_posts', 'manage_wp_posts_be_qe_pre_get_posts', 1 );
function manage_wp_posts_be_qe_pre_get_posts( $query ) {
if ( $query->is_main_query() && ( $orderby = $query->get( 'orderby' ) ) ) {
switch( $orderby ) {
case 'delivery_date':
// set our query's meta_key, which is used for custom fields
$query->set( 'meta_key', 'datepicker' );
$query->set( 'orderby', 'meta_value' );
break;
}
}
}
how I can orderby meta_valuewith format date?
Mass matrix for hat functions, triangulation
Ive included a picture of the task im trying to solve where i need to show some equalities for the integral of hat functions on a triangulated grid
enter image description here
naming – Terminology for cumulative vs non cumulative functions on timeseries data
Say you had some (contrived) timeseries data like:
time | 1 | 2 | 3 | 4 | 5 |
temp 1 | 3 | 3 | 4 | 4 | 5 |
temp 2 | 2 | 2 | 2 | 2 | 2 |
...etc
Is there a particular terminology for functions that go across the rows (cumulative) vs the columns (point in time)?
For example, the sum of temp 1 across all the time periods is 19 (cumulative) but perhaps the max temp at time 3 is 4 (point in time).
functions – Convert list of InterpolatingFunctions to data
Clear("Global`*")
data = RandomReal(10, {20, 2}) // Sort;
g = Interpolation(data)
The source data can be extracted from the InterpolatingFunction
data === Transpose({g((3, 1)), g((4, 3))})
(* True *)
To uniformly resample the InterpolatingFunction
on the domain
dom = g((1, 1))
(* {0.0472677, 9.7063} *)
data2 = {#, g(#)} & /@ (Subdivide(##, 9) & @@ dom);
Show(
Plot(g(x), {x, dom((1)), dom((2))},
PlotRange -> All),
ListPlot({data, data2},
PlotStyle -> {Blue, Red}))
Two non constant meromorphic functions over a connected compact Riemann surface, could not be algebraically independent
Let $M$ be a connected compact Riemann surface. Let $f, g$ be two nonconstant meromorphic functions. Why is there a two-variable complex polynomial $F(x,y)$ that vanishes for $(x, y)=(f, g)$, (in other words $F(f,g)=0$)?
custom functions in function file delete automatically daily
I have added some custom ajax calls and functionality on my WordPress site. I added code in function.php which is placed in wp_includes folder. It was working fine but from the last 2 weeks, my custom functions automatically removed from functions.php file.
what is the solution of this? I am new to WordPress. Any help would be highly appreciable.
functions – query_vars treat as single var from URL
I want to use the link parameter from URL as one query_var.
If I visit the page where (flipwoo) is in, for example:https://test.com/test/?link=https://test.com/?download_file=1953&order=wc_order_zHOH4RI97k9mR&email=test%40gmail.com&key=91c44b50-6922-4976-ac57-6d499136eead
the following is echoed:https://test.com/?download_file=1953
but I want the whole URL after ?link= to be echoed:https://test.com/?download_file=1953&order=wc_order_zHOH4RI97k9mR&email=test%40gmail.com&key=91c44b50-6922-4976-ac57-6d499136eead
Where is the mistake?
function themeslug_query_vars( $qvars ) {
$qvars() = 'link';
return $qvars;
}
add_filter( 'query_vars', 'themeslug_query_vars' );
function get_woolink() {
$linked = get_query_var( 'link', 1 );
echo $linked;
}
add_shortcode('flipwoo', 'get_woolink');
Bezout’s identity for analytic functions of several variables
In (single-variable) complex analysis, given analytic functions $f$ and $g$ with no common zeros, one can find analytic functions $u$ and $v$ such that $uf+vg=1$. I’d like to know if the same holds in several variables; as a simple case, specifically,
Let $f,gcolonmathbb{D}^2tomathbb{C}$ be analytic (in the bi-disc $mathbb{D}^2$) with no common zeros. Does there exist analytic functions $u,vcolon mathbb{D}^2tomathbb{C}$ such that $uf+vg=1$?
functions – Computing the sign of an expression
As $sigma>0$ we can divide the expression by $sigma$ without changing its sign. Then, defining $x=(p-v_0)/sigma$, the expression becomes
Sign(Sqrt(2) + E^(x^2/2)*Sqrt(π)*x*Erfc(-x/Sqrt(2)))
This expression seems to be positive for any $xinmathbb{R}$, so I’d say that the answer to your question is that your Sign(...)
is always 1:
LogPlot(Sqrt(2) + E^(x^2/2)*Sqrt(π)*x*Erfc(-x/Sqrt(2)), {x, -1000, 10},
WorkingPrecision -> 100, PlotRange -> All)
The asymptotes of your expression are
- $sqrt{2}/x^2$ for $xto-infty$, which is positive,
- $2xsqrt{pi} e^{frac{x^2}{2}}$ for $xto+infty$, which is positive.