interpolation

Color scaling function

由 一笑奈何 提交于 2019-11-27 01:09:55
问题 I am trying to visualize some values on a form. They range from 0 to 200 and I would like the ones around 0 be green and turn bright red as they go to 200. Basically the function should return color based on the value inputted. Any ideas ? 回答1: Basically, the general method for smooth transition between two values is the following function: function transition(value, maximum, start_point, end_point): return start_point + (end_point - start_point)*value/maximum That given, you define a

How to implement linear interpolation?

由 北慕城南 提交于 2019-11-27 01:00:53
Say I am given data as follows: x = [1, 2.5, 3.4, 5.8, 6] y = [2, 4, 5.8, 4.3, 4] I want to design a function that will interpolate linearly between 1 and 2.5 , 2.5 to 3.4 , and so on using Python. I have tried looking through this Python tutorial , but I am still unable to get my head around it. As I understand your question, you want to write some function y = interpolate(x_values, y_values, x) , which will give you the y value at some x ? The basic idea then follows these steps: Find the indices of the values in x_values which define an interval containing x . For instance, for x=3 with

How do I make angular.js reevaluate / recompile inner html?

由 孤人 提交于 2019-11-27 00:27:20
问题 I'm making a directive that modifies it's inner html. Code so far: .directive('autotranslate', function($interpolate) { return function(scope, element, attr) { var html = element.html(); debugger; html = html.replace(/\[\[(\w+)\]\]/g, function(_, text) { return '<span translate="' + text + '"></span>'; }); element.html(html); } }) It works, except that the inner html is not evaluated by angular. I want to trigger a revaluation of element 's subtree. Is there a way to do that? Thanks :) 回答1:

AngularJS strategy to prevent flash-of-unstyled-content for a class

由 耗尽温柔 提交于 2019-11-27 00:16:29
问题 I have an AngularJS project, I want to prevent a FOUC during page load on a classname. I've read about ng-template but that seems useful only for content within a tag. <body class="{{ bodyClass }}"> I would like it to be "login" on page load. Any strategy for this? Or do I just have to fudge it and load it as 'login' and manually use javascript to to tweak the DOM just for this instance. 回答1: What you are looking for is ng-cloak . You have to add it like this: <body class="{{ bodyClass }}" ng

get x-value given y-value: general root finding for linear / non-linear interpolation function

由 回眸只為那壹抹淺笑 提交于 2019-11-26 23:04:19
I am interested in a general root finding problem for an interpolation function. Suppose I have the following (x, y) data: set.seed(0) x <- 1:10 + runif(10, -0.1, 0.1) y <- rnorm(10, 3, 1) as well as a linear interpolation and a cubic spline interpolation: f1 <- approxfun(x, y) f3 <- splinefun(x, y, method = "fmm") How can I find x -values where these interpolation functions cross a horizontal line y = y0 ? The following is a graphical illustration with y0 = 2.85 . par(mfrow = c(1, 2)) curve(f1, from = x[1], to = x[10]); abline(h = 2.85, lty = 2) curve(f3, from = x[1], to = x[10]); abline(h =

Conversion between RGB and RYB color spaces

由 时光怂恿深爱的人放手 提交于 2019-11-26 22:51:50
问题 I am currently trying to convert colours between RGB (red, green, blue) colour space and RYB (red, yellow, blue) colour space and back again. Based on the details in the following paper, I am able to convert from RYB to RGB using trilinear interpolation - where the parametric weightings (s,t,u) are the RYB colors, and the vertices of the cube are 3d points in RGB space. Paint Inspired Color Mixing and Compositing for Visualisation - Gossett and Chen - Section 2.1 - Realization Details My

Fast interpolation of grid data

由 点点圈 提交于 2019-11-26 22:46:13
问题 I have a large 3d np.ndarray of data that represents a physical variable sampled over a volume in a regular grid fashion (as in the value in array[0,0,0] represents the value at physical coords (0,0,0)). I would like to go to a finer grid spacing by interpolating the data in the rough grid. At the moment I'm using scipy griddata linear interpolation but it's pretty slow (~90secs for 20x20x20 array). It's a bit overengineered for my purposes, allowing random sampling of the volume data. Is

Pandas interpolate within a groupby

由 南笙酒味 提交于 2019-11-26 21:17:08
问题 I've got a dataframe with the following information: filename val1 val2 t 1 file1.csv 5 10 2 file1.csv NaN NaN 3 file1.csv 15 20 6 file2.csv NaN NaN 7 file2.csv 10 20 8 file2.csv 12 15 I would like to interpolate the values in the dataframe based on the indices, but only within each file group . To interpolate, I would normally do df = df.interpolate(method="index") And to group, I do grouped = df.groupby("filename") I would like the interpolated dataframe to look like this: filename val1

Dynamically define a variable in LESS CSS

由 旧巷老猫 提交于 2019-11-26 20:57:25
问题 I am trying to create a mixin that dynamically defines variables in LESS CSS, by actually assigning them a composite name. The simplified use-case (not the real one): .define(@var){ @foo{var}: 0; } Then one would call the mixin as such: .define('Bar'){ @fooBar: 0; } Since this kind of string interpolation is possible while using selectors names, I was wondering if the same would be possible for variable names; so far, I have had no luck with various syntaxes I tried (other than the above, I

Property binding vs attribute interpolation

由 筅森魡賤 提交于 2019-11-26 20:14:36
问题 I have read an article about difference between property and attribute bindings. From what I understood, most of the time, Angular2 prefers property bindings, because after each change in data, the DOM would be updated. (If I am mistaken, please correct me). I have a custom component and use it from the parent component. In it, I have an @Input named truevalue . when I initiate truevalue from the parent via property binding, sometimes, it does not change. I used following code: <my-checkbox [
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