lag

问题 I've been searching but have been unable to find a solution to this--I know it's do-able but I just don't have the ninja SQL skills I need (yet).... I'm looking for a solution to this issue: I have a 2 tables related to stock market data. The first is a simple list of stock symbols with an ID and stock ticker symbol (ID,SYMBOL). The second table contains historical price data for each of the stocks. (ID, DATE, OPEN, HIGH, LOW, CLOSE, VOLUME). I'm trying to figure out how to query for stocks

问题 Assume that you have a table with user name, counter and score for each counter. data have; input user $ counter score; cards; A 1 . A 2 . A 3 40 A 4 . A 5 20 A 6 . B 1 30 B 2 . C 1 . C 2 . C 3 . ; run; Some scores are missing beween some counters, and you want to put the same score as previous counter. So the result will look like below: A 1 40 A 2 40 A 3 40 A 4 40 A 5 20 A 6 20 B 1 30 B 2 30 C 1 . C 2 . C 3 . I managed to fill the missing score values forward by using the lag function like

问题 I am calling setNeedsDisplay from touches moved (and have also tried not calling from touches moved, but instead from a 0.05 timer) and the drawrect method is always laggy. Is their anyway to change this? I am doing a lot of drawing in drawrect but I have no idea for a solution to fix the lag. Even when the timer was called at a 1.0 interval than it still lagged when the timer called the selector. Also, I have no leaks (I checked using Xcode analyze feature ). Please help!! EDIT: I am calling

问题 I am a near beginner android programmer, and i have made a simple 2D spaceship game in surfaceView class where you can control the spacehip with your finger and you have dodge oncoming objects. However, now that i am using a lot of bitmaps my game seems to be lagging a bit. So i was wondering is there a way to destroy/garbage pictures after you use them, so they don't create so much lag. (because i think, the pictures are creating the lag) Please tell me another simple way to make my game

问题 I want to find the count of rows between first and last occurrence of a value. However when there are five or more records of a different value between them, stop counting. So if last occurrence is today and first occurrence is yesterday, the result would be 2 (today plus yesterday). If last occurrence is today and first occurrence is 8 days ago AND there is no occurrence in between the two, the result would be '1'. If however there would be another occurrence 3 days ago, the result would be

问题 I have a producer in java and consumer in nodeJS. I want to know in java what is the consumer lag, so i know if i can produce more data to the topic. What is the API in java to get the consumer lag? 回答1: Why do you need to know the consumer lag ? The aim of a broker is to produce messages asynchronously. If you need to have a synchronous processing, use a basic rest processing. 回答2: The actual class you can call from Java is the kafka.admin.ConsumerGroupCommand . It's Scala code, but it's

问题 I am working on a 3D map in SceneKit. When I enable the Cast Shadow Property of a directional light in SceneKit, the shadows appear, but the application becomes very slow. How do I reduce the lag while still maintaining shadows in the scene? 回答1: Use Fake Shadows (shadows generated and baked as a texture in 3D authoring tool) rather than True Shadow Map . To apply fake shadows as a texture for 3D plane use PNG file format with premultiplied alpha channel ( RGB * A ). It helps you get rid of

问题 i'm having an issue working with CardViews . I`ve created a CardView containing 1 TextView and 2 ImageViews , which gets displayed in an RecycleView . When i try to update the contents of one of the CardViews (created 5 cards for testing) the interface starts to lag when scrolling over the updated card, but goes back to normal when i pass the item. It only happens when ImageViews are present , when substituting the ImageViews for say, TextViews with some random text in them, it works normally

问题 I am trying to calculate the time between sequential observations. I have attached a sample of my data here. A subset of my data looks like: head(d1) #visualize the first few lines of the data date time year km sps pp datetime next timedif seque <fct> <fct> <int> <dbl> <fct> <dbl> <chr> <dbl> <dbl> <fct> 2012/06/21 23:23 2012 80 MUXX 1 2012-06-21 23:23 0 4144 10 2012/07/15 11:38 2012 80 MAMO 0 2012-07-15 11:38 1 33855 01 2012/07/20 22:19 2012 80 MICRO 0 2012-07-20 22:19 0 7841 00 2012/07/29

问题 This question already has an answer here : Shift a column of lists in data.table by group (1 answer) Closed 3 years ago . shift in R 's data.table is great for time series and time window stuff. But columns of lists don't lag the same way that columns of other elements do. In the code below, gearLag lead/lags gear correctly, but gearsListLag isn't lagging gearsList , instead, shift is operating within gearsList to lag the element on itself in the same row. dt <- data.table(mtcars)[,.(gear,