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KNITRO

This is a proof of concept interface between R and knitro. The goal for the proof of concept is to enable users to express the code from this page entirely in R.

demo/knitro.R contains a demo.

Installation

This package does not contain knitro, so you have to install your own copy and deal with licences as you would normally do.

Currently, the package uses an environment variable KNITRO to locate a directory where it will find knitro's include and lib directory. Make sure this variable is set and points to the correct directory.

For example, I have this in my ~/.bash_profile:

export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks

The KNITRO R package currently supports R functions as callbacks. For example the function below can be used as a callback.

fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a callback has precisely these arguments, in the same order.

If changes are made to the arguments, they must be returned as a list. In this example, changes are made to obj and c.

About

R bindings for Knitro

Resources

Readme
Activity

Stars

0 stars

Watchers

1 watching

Forks

0 forks
Report repository

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

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inst
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README.md
README.md
Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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README.md
Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
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0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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demo
inst
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README.md
Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

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README.md
Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
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var __m = "*";
var __re = new RegExp('^' + ".*" + '

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demo
inst
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NAMESPACE
README.md
README.md
Repository files navigation
KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
About
R bindings for Knitro
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
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0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
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KNITRO
This is a proof of concept interface between R and knitro. The goal for the proof of
concept is to enable users to express the code from
this page
entirely in R.
demo/knitro.R contains a demo.
Installation
This package does not contain knitro, so you have to install your own copy and
deal with licences as you would normally do.
Currently, the package uses an environment variable KNITRO to locate
a directory where it will find knitro's include and lib directory. Make sure
this variable is set and points to the correct directory.
For example, I have this in my ~/.bash_profile:
export KNITRO=/Users/romain/knitro
DYLD_LIBRARY_PATH=$KNITRO/lib
export DYLD_LIBRARY_PATH

Callbacks
The KNITRO R package currently supports R functions as callbacks. For example
the function below can be used as a callback.
fun <- function(evalRequestCode, n, m, nnzJ, nnzH,x,lambda,obj,c,objGrad,jac,hessian,hessVector){
if (evalRequestCode != KTR_RC_EVALFC)
stop("Wrong evalRequestCode in callback function.");
# objective function
obj <- 1000 - x[1]*x[1] - 2*x[2]*x[2] - x[3]*x[3] - x[1]*x[2] - x[1]*x[3]
# constraints
c <- c(
8*x[1] + 14*x[2] + 7*x[3] - 56, x[1]*x[1] + x[2]*x[2] + x[3]*x[3] - 25
)
list( obj = obj, c = c )
}

The internal code of the package checks that the function supplied as a
callback has precisely these arguments, in the same order.
If changes are made to the arguments, they must be returned as a list. In this
example, changes are made to obj and c.
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R bindings for Knitro
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