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问题 I am working in R Markdown, knitting to PDF. I thought the following code should create a table with a local image, but it is not working. Any help would be greatly appreciated! column1 <- c("1", "2", "3") column2 <- c("a", "b", "c") column3 <- c("x", "y", "z") dat <- data.frame(column1, column2, column3) dat$column1[1] <- "{ width=25px }" print(kable(dat)) 回答1: --- title: "pic in column" author: "test" date: "2014/08/03" output: html_document --- ```{r results='asis'}

问题 I have been trying for days to get jquery autocomplete to work the way I need it to. so far I have this which works fine: <script> $(function() { var availableTags = [<?php $taglist = Array(); foreach ($users as $user) if ($user->getAttribute('first_name') == ''){ $taglist[] = '"'.$user->getUserName().'"'; }else{ $taglist[] = '"'.$user->getAttribute('first_name').' '.$user->getAttribute('last_name').'"'; } echo join(',', $taglist); ?>]; $("#searchmem").autocomplete({ source: availableTags,

问题 The SVG is not display correctly when it is loaded from <use> tag. I've added an img tag to illustrate the expected result. Code sample: <svg> <use xlink:href="file.svg" href="file.svg"></use> </svg> <img src="file.svg" /> Current output: Working fiddle: demo Thank to anyone who can point out my mistake. 回答1: You have this error: Unsafe attempt to load URL https:.....svg from frame with URL https://...... Domains, protocols and ports must match You need to use the id of the svg object you

问题 I have two images on the same row but I want these images have the same height also. This is my code now: HTML: <div> <div class="img1"> <img src="http://www.immobiliaredelcentromodena.com/wp-content/uploads/2017/02/esterno-agenzia.jpg"> </div> <div class="img2"> <img src="http://www.immobiliaredelcentromodena.com/wp-content/uploads/2017/02/interno-agenzia.jpg"> </div> <div> CSS: .img1 { float:left; width:30%; } .img2 { float:right; width:60%; } I tried to use the max-height property without

问题 I have two images on the same row but I want these images have the same height also. This is my code now: HTML: <div> <div class="img1"> <img src="http://www.immobiliaredelcentromodena.com/wp-content/uploads/2017/02/esterno-agenzia.jpg"> </div> <div class="img2"> <img src="http://www.immobiliaredelcentromodena.com/wp-content/uploads/2017/02/interno-agenzia.jpg"> </div> <div> CSS: .img1 { float:left; width:30%; } .img2 { float:right; width:60%; } I tried to use the max-height property without

问题 I'm trying to send a frame and throw socket by python, using opencv . The image is sent as string stream but when i remake the image on the server,the bytes are not in the right order. Client code : import socket import numpy as np import cv2 UDP_IP = "127.0.0.1" UDP_PORT = 5005 cap = cv2.VideoCapture(1) sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) while 1: ret, frame = cap.read() cv2.imshow('client', frame) d = frame.flatten() s = d.tostring() #sock.sendall(s) #print len(s) for i

问题 I'm working on a simple html form to upload an image, then save it on a directory situated on my localhost. <form action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']);?>" enctype="multipart/form-data" method="post"> <label for="img">Pick a picture</label> <input id="img" type="file" name="image"> <input type="submit" name="imageProfil" value="Upload the image"> </form> However, when I handle the image, while checking errors (in $_FILES['image']['errors'], I'm getting an error 3, which

问题 We have a small feature on our site which allows users to upload a profile picture. This picture will then be stored in our Postgres database as a base-64 encoded string. My question concerns the data scheme used in an <img> URL to render a base-64 encoded string, e.g. <img src="data:image/gif;base64,iVBORw0KGgo ..."> ^^^ but what if we don't know the extension? We plan on simply storing a base-64 blob and nothing else. But in this case, how could we know what extension was used in the

问题 I am using an SVG based 64 as an image source. This looks fine on a desktop, but when I view on my mobile (Iphone XS MAX - Safari), this looks really blury. See below fiddle which has two images, one is just the raw SVG, and the second is the SVG base 64 used as source. https://jsfiddle.net/t0e4sjw3/ You can see from the screenshot below, that the one used as an image is very blury and the filter seems to be a lot bigger than on the first image. Is there any way to stop this? <svg xmlns="http

问题 I am using an SVG based 64 as an image source. This looks fine on a desktop, but when I view on my mobile (Iphone XS MAX - Safari), this looks really blury. See below fiddle which has two images, one is just the raw SVG, and the second is the SVG base 64 used as source. https://jsfiddle.net/t0e4sjw3/ You can see from the screenshot below, that the one used as an image is very blury and the filter seems to be a lot bigger than on the first image. Is there any way to stop this? <svg xmlns="http