gradient

Checking the gradient when doing gradient descent

由 允我心安 提交于 2021-02-19 08:22:32
问题 I'm trying to implement a feed-forward backpropagating autoencoder (training with gradient descent) and wanted to verify that I'm calculating the gradient correctly. This tutorial suggests calculating the derivative of each parameter one at a time: grad_i(theta) = (J(theta_i+epsilon) - J(theta_i-epsilon)) / (2*epsilon) . I've written a sample piece of code in Matlab to do just this, but without much luck -- the differences between the gradient calculated from the derivative and the gradient

Checking the gradient when doing gradient descent

由 血红的双手。 提交于 2021-02-19 08:22:12
问题 I'm trying to implement a feed-forward backpropagating autoencoder (training with gradient descent) and wanted to verify that I'm calculating the gradient correctly. This tutorial suggests calculating the derivative of each parameter one at a time: grad_i(theta) = (J(theta_i+epsilon) - J(theta_i-epsilon)) / (2*epsilon) . I've written a sample piece of code in Matlab to do just this, but without much luck -- the differences between the gradient calculated from the derivative and the gradient

CSS3 Background Gradients Not Validating, Can Someone Tell Me Why? Code Example Inside

由 帅比萌擦擦* 提交于 2021-02-19 02:26:37
问题 Can someone tell me why the following css is not validating? I've been trying to research this myself with no luck. All of the documentation I've read says this is the proper why to do gradients in css3. #header { color: white; font-size: 12px; font-family: Helvetica, Verdana, Arial, sans-serif; background: black; background: -moz-linear-gradient(top, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0) 100%); background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0.65)), color

Draw a D3 circle with gradient colours

由 旧时模样 提交于 2021-02-18 04:53:39
问题 How to draw a circle with gradient color? Say, a gradient from yellow to blue. Normally, to create a circle in yellow we can use the following code: var cdata=[50,40]; var xscale=40; var xspace =50; var yscale=70; var svg = d3.select("body") .append("svg") .attr("width", 1600) .attr("height", 1600); var circle = svg.selectAll("circle") .data(cdata) .enter() .append("circle"); var circleattr = circle .attr("cx", function(d) { xscale = xscale+xspace; return xscale; }) .attr("cy", function(d) {

CSS3 gradient 颜色渐变效果

由 ￡可爱￡侵袭症＋ 提交于 2021-02-17 06:41:25
CSS3 Gradient分为 linear-gradient(线性渐变) 和 radial-gradient（径向渐变） 。为了更好的应用CSS3 Gradient, 需要先了解一下目前的几种浏览器的内核，主要有Mozilla( Friefox, Flock等)， webkit(Safari, chrome等)，Opera(Opera浏览器)， Trident(IE浏览器)。 线性渐变在Mozilla下的应用： 语法： -moz-linear-gradient( [<point> || <angle>,]? <stop>, <stop> [, <stop>]* ) 参数：其共有三个参数，第一个参数表示线性渐变的方向,top是从上到下，left是从做到右，如果定义成left top,那就是从左上角到右下角。第二个和第三个参数分别是起点颜色和终点颜色。你还可以在它们之间插入更多的参数，表示多种颜色的渐变。如图所示： 根据上面的介绍，我们先来看看一个简单的例子： HTML: <div class="example example1"></div> CSS: .example { width: 150px; height: 80px; } 如无特殊说明，我们后面的实例都是应用这一段html和CSS的基本代码。 现在我们给这个div应用一个简单的渐变样式： .example {

HTML Help Workshop: css gradient vanishes

由 廉价感情. 提交于 2021-02-10 19:56:56
问题 I attached a page.css (contents below) and .gif files to [Files] section of my help project and added this line into some of the html files: <body class="grade"> <link rel="stylesheet" href="page.css" type="text/css" /> Everything works fine, the chm file shows a nice gradient. A strange thing happens when I switch to a non-gradient page inside the help and then switch back to a gradient site: The gradient is gone but other css attributes are still there. Does anybody has an idea? Here my

HTML Help Workshop: css gradient vanishes

由 …衆ロ難τιáo~ 提交于 2021-02-10 19:56:26
问题 I attached a page.css (contents below) and .gif files to [Files] section of my help project and added this line into some of the html files: <body class="grade"> <link rel="stylesheet" href="page.css" type="text/css" /> Everything works fine, the chm file shows a nice gradient. A strange thing happens when I switch to a non-gradient page inside the help and then switch back to a gradient site: The gradient is gone but other css attributes are still there. Does anybody has an idea? Here my

CSS3 animation: Not loading in Safari

由 |▌冷眼眸甩不掉的悲伤 提交于 2021-02-10 14:46:41
问题 the following animation doesn't even load in Safari browser (but works nicely in Chrome, Mozilla, IE, Opera) http://codepen.io/anon/pen/utdIK Any idea how to fix it? This problem looks similar, but it didn't fit to my problem. CSS3 animation not working in safari HTML: <div id="spinner-2"> <div class="slices bar"> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> </div> </div> <div class="maskWheel"></div> </div> CSS: #spinner-2 { width: 45px;

CSS3 animation: Not loading in Safari

由 百般思念 提交于 2021-02-10 14:46:08
问题 the following animation doesn't even load in Safari browser (but works nicely in Chrome, Mozilla, IE, Opera) http://codepen.io/anon/pen/utdIK Any idea how to fix it? This problem looks similar, but it didn't fit to my problem. CSS3 animation not working in safari HTML: <div id="spinner-2"> <div class="slices bar"> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> </div> </div> <div class="maskWheel"></div> </div> CSS: #spinner-2 { width: 45px;

How to return intermideate gradients (for non-leaf nodes) in pytorch?

由 送分小仙女□ 提交于 2021-02-10 14:25:44
问题 My question is concerning the syntax of pytorch register_hook . x = torch.tensor([1.], requires_grad=True) y = x**2 z = 2*y x.register_hook(print) y.register_hook(print) z.backward() outputs: tensor([2.]) tensor([4.]) this snippet simply prints the gradient of z w.r.t x and y , respectively. Now my (most likely trivial) question is how to return the intermediate gradients (rather than only printing)? UPDATE: It appears that calling retain_grad() solves the issue for leaf nodes. ex. y.retain
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