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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to plot the graph using ggplot2 So I have the following dataframe: iter se perf name 1 V1 0.6463573 12.8 e 2 V2 0.3265986 16.8 e 3 V3 0.2333333 19.1 e 4 V4 0.1000000 19.9 e 5 V5 0.0000000 20.0 e 6 V1 0.7483315 12.6 f 7 V2 0.6333333 16.3 f 8 V3 0.6798693 18.8 f 9 V4 0.2236068 19.5 f 10 V5 0.1000000 19.9 f and I am trying to plot it in the format similar to this page (under Line graphs). So here is the code for plotting: pd and it is working nicely: , except that I want these dots to be connected. I tried to add group=1 or group

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm reading through an example of page tables and just found this: Consider a system with a 32-bit logical address space. If the page size in such a system is 4 KB (2^12), then a page table may consist of up to 1 million entries (2^32/2^12). Assuming that each entry consists of 4 bytes, each process may need up to 4 MB of physical address space for the page table alone. I don't really understand what this 4MB result represents. Does it represent the space the actual page table takes up? 回答1: Since we have a virtual address space of

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: in stack-overflow, there's a badge called "Enthusiast" which is earned by "Visited the site each day for 30 consecutive days" how to write this query in sql server? 回答1: Create a table with Id , LastVisit , DaysConsecutivelyVisited and just update the table appropriately on each visit. The logic is clear, and there is no need for an ugly SQL query to otherwise extract the desired information. 回答2: You may gain some insight on the challenges here by reading the questions tagged enthusiast-badge on meta.stackoverflow.com . One

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to create a learn application and I would like to load data template for based on Question type as explained below. If Question Type is TYPE1 load InstructionTemplate_Type1.xaml load ChoiceTemplate_Type1.xaml load QuestionTemplate_Type1.xaml If Question Type is TYPE2 load InstructionTemplate_Type2.xaml load ChoiceTemplate_Type2.xaml load QuestionTemplate_Type2.xaml If Question Type is TYPE3 load InstructionTemplate_Type3.xaml load ChoiceTemplate_Type3.xaml load QuestionTemplate_Type3.xaml else load InstructionTemplate_Type3.xaml

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I was looking at another stackoverflow question and I tried the following: d3.selectAll(links.filter(function(db) { return db.source.id == 'foo' })).each(function(p) { console.log (p.source.id) }) And found that it returned with a TypeError: Cannot read property 'source' of undefined even though the filtered selection comes back as a proper array of objects with .source.id values (this example uses the standard link notation found in D3's force-directed networks). I'm just curious as to why this wouldn't work. 回答1: Make sure you are clear on

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a UITabBarController interface with 4 tabs. Each tab has a UINavigationController . How would I return to the topmost UIViewController in each UINavigationController whenever a tab bar button is pressed? 回答1: -popToRootViewControllerAnimated 文章来源: Return to top of UINavigationController stack when clicking a tab?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm a D3.js newbie and I'm learning how to play around with data. Let's say I have an object with names as keys, and each key has an array of numbers like this: var userdata = { 'John' : [0, 1, 3, 9, 8, 7], 'Harry': [0, 10, 7, 1, 1, 11], 'Steve': [3, 1, 4, 4, 4, 17], 'Adam' : [4, 77, 2, 13, 11, 13] }; For each user, I would like to append an SVG object and then plot the line with the array of values for that user. So here is my assumption of how that would look based on tutorials, but I know it is incorrect. This is to show my limited

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: There is string array ARRAY['CAT','CAT DOG CAT','DOG Cat'] Now i want to sort this array on count of words in each element. I have tried but cannot get any success. I want this output ARRAY['CAT DOG CAT','DOG CAT','Cat'] How i can do this? 回答1: This does feel rather clumsy, but I can't think of a simpler solution right now: with val (col) as ( values (ARRAY['CAT','CAT DOG CAT','DOG Cat']) ), word_list as ( select unnest(col) as pc from val ), wc as ( select array_length(string_to_array(pc, ' '),1) as word_count, pc from word_list ) select

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This is an example DataFrame with multi index rows. row_idx_arr = list(zip(['r0', 'r0', 'r0', 'r1', 'r1', 'r1', 'r2', 'r2', 'r2', 'r3', 'r3', 'r3'], ['r-00', 'r-01', 'r-02', 'r-00', 'r-01', 'r-02', 'r-00', 'r-01', 'r-02', 'r-00', 'r-01', 'r-02', ])) row_idx = pd.MultiIndex.from_tuples(row_idx_arr) d = pd.DataFrame((np.random.randn(36)*10).reshape(12,3), index=row_idx, columns=['c0', 'c1', 'returns']) c0 c1 returns r0 r-00 3.553446 5.434018 5.141394 r-01 10.045250 18.453873 13.170396 r-02 -7.231743 -11.695715 5.303477 r1 r-00 -1.302917 6

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to create a dynamic js table and I want to give id to each cell dynamically. I want to use those ids to use in different js event handlers. How it can be done? I have tried in different ways but none of them works! <html> <head> <style> #colors { float: right; width: 400px; height: 400px; } </style> </head> <body> <script> var d; var k = 0; function makeit() { var tbl = document.createElement("table"); var atts = document.createAttribute("style"); atts.value = "border:1px solid black;text-align:center;padding:2px;margin:3px 3px