size | 易学教程

Automatically resize bars in ggplot for uniformity across several graphs R

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问题 I generate several bars graphs in a loop, and they all resize according to the output size (assume from plot/device size?) rather than according to the bar size. This means that plots with two bars have fat bars, and plots with, say, 6 bars, have thin bars; both outputs are the same size though. The code below represents my script with reproduceable data (I do many other aes/theme changes to mine). I'd like the output plot to resize (in the dimension of bar width) so that the bars are always

Calculate letter size in javascript

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问题 I need to calculate the exact size of the letter in javascript. The letter can have different font-size or font-family attributes, etc. I tried to use div element for this, but this method gives only the size of the div, not letter. <div style="display: inline; background-color: yellow; font-size: 53px; line-height:32px">A</div> Does anybody know how to solve this issue? 回答1: This is basically not possible for the general case. Font kerning will result in variable "widths" of letters

GDB reports “no symbol in current context” upon array initialization

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问题 I am attempting to initialize an array with a size of ceil(buflen/125.0) as follows: long long maxjpg = ceil(buflen/125.0); long long arr[maxjpg]; I do not receive a compiler error, but GDB reports "no symbol 'arr' in current context". The only fix I have found is by hardcoding a numerical value into the array size like so: long long arr[5]; I have tried casting, using different variable types, using const and any combination of these approaches. I know that ceil returns a double , I have

iOS Game Size problem [closed]

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问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I developed an iOS Universal game and I want to know if 100mb means that the game is very large compared to other games, I really have a problem with those .png images which are over 8mb each 回答1: 100mb is a very

DFS_BFS（深度优先搜索和广度优先搜索）

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package com.rao.graph; import java.util.LinkedList; /** * @author Srao * @className BFS_DFS * @date 2019/12/10 19:16 * @package com.rao.graph * @Description 深度优先搜索和广度优先搜索 */ public class BFS_DFS { /** * 图的顶点 */ private static class Vertex{ int data; Vertex(int data){ this.data = data; } } /** * 图（邻接表） */ private static class Graph{ private int size; private Vertex[] vertices; //存放每个顶点的链表 private LinkedList<Integer>[] adj; Graph(int size){ this.size = size; vertices = new Vertex[size]; adj = new LinkedList[size]; for (int i = 0; i < size; i++) { vertices[i] = new Vertex(i); adj[i] = new

How full does the old generation have to be to trigger a major GC cycle?

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问题 I am working on resolving a high garbage collection utilization rate in our production environment, and was wondering if setting a large heap size guaranteeing that the old generation will never be really filled up would prevent triggering a major GC cycle. For that to be true, I imagine that there is a certain threshold mark at which a major GC cycle gets triggered. If this assumption is true, can someone please let me know what that number is? If not, I would appreciate an explanation of

How to get TOTAL memory and internal storage size Android?

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问题 I'm attempting to get the total memory (RAM) and internal storage size, but every method I have used is reporting it too low. I'm aware the kernel may take up some of it but I need to know how much there is installed in total. For the memory I first just read from /proc/meminfo/ then used the getMemoryInfo . Each of these reported less than the amount of memory installed (700MB instead of 1GB). for the internal storage size I am using Environment.getDataDirectory , getBlockSizeLong and

Memory usage of class instance in c# [duplicate]

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问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: How much memory does a C#/.NET object use? Like the title says, how can I check how much memory a class instance takes in memory in c# (webforms) 回答1: private System.Diagnostics.PerformanceCounter ramCounter; ramCounter = new System.Diagnostics.PerformanceCounter("Memory", "Available MBytes"); public string getAvailableRAM() { return ramCounter.NextValue() + "Mb"; } Those be the tools to your disposal :D

content “jumps” vertically on Chrome iOS with viewport sizing when address bar is hidden/displayed [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last month . Im' having different sections on my website and I want some of them to take the full viewport height. So I size with height: 100vh; On Chrome iOS, this results in the content slightly "jumping vertically" whenever the address bar is hidden or displayed again. In particular, this happens whenever user scrolls in

Why does using boost increase file size so much?

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问题 I've noticed that when I use a boost feature the app size tends to increase by about .1 - .3 MB. This may not seem like much, but compared to using other external libraries it is (for me at least). Why is this? 回答1: Boost uses templates everywhere . These templates can be instantiated multiple times with the same parameters. A sufficiently smart linker will throw out all but one copy. However, not all linkers are sufficiently smart. Also, templates are instantiated implicitly sometimes and it