- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
我有以下名为 trades
的 xts 对象:
trades = structure(c("37119712", "37119713", "37119714", "37119715", "37119716",
"37119717", "37119720", "37119722", "37119724", "37119725", "37119726",
"37119727", "37119732", "37119734", "37119735", "37119741", "37119742",
"37119756", "37119774", "37119775", "37119834", "37119835", "37119836",
"37119850", "37119851", "37119852", "37119853", "37119854", "37119855",
"37119856", "BID", "BID", "BID", "BID", "BID", "ASK", "BID",
"BID", "ASK", "BID", "BID", "ASK", "BID", "BID", "ASK", "BID",
"BID", "ASK", "BID", "BID", "ASK", "ASK", "ASK", "BID", "BID",
"ASK", "ASK", "ASK", "BID", "BID", "440.002", "440.002", "440.030",
"440.983", "441.500", "440.000", "440.000", "440.000", "439.335",
"440.998", "441.496", "439.335", "441.496", "441.496", "441.496",
"441.490", "441.500", "439.736", "439.736", "441.400", "439.645",
"439.643", "439.642", "441.400", "441.400", "441.400", "441.400",
"440.960", "441.499", "441.500", "1.0000000", "8.7381500", "1.5481100",
"0.0639222", "0.4908570", "3.1680000", "0.0473160", "0.7825840",
"0.0108432", "0.0270000", "0.0263241", "0.0100000", "0.1060000",
"0.1879220", "0.1150000", "0.1000000", "1.8170000", "0.0222000",
"0.0234469", "2.4815500", "0.2730000", "0.0380000", "3.0852800",
"0.5824950", "0.0100000", "0.0689000", "0.2188070", "0.0100000",
"0.0705000", "0.8139830", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE",
"TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE",
"TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE",
"TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE", "TRUE",
"TRUE"), .Dim = c(30L, 5L), .Dimnames = list(NULL, c("id", "type",
"price", "size", "api")), index = structure(c(1399673507, 1399673524,
1399673524, 1399673524, 1399673524, 1399673531, 1399673553, 1399673565,
1399673605, 1399673609, 1399673609, 1399673619, 1399673645, 1399673677,
1399673686, 1399673721, 1399673721, 1399673764, 1399673810, 1399673810,
1399674172, 1399674172, 1399674172, 1399674333, 1399674333, 1399674335,
1399674353, 1399674368, 1399674368, 1399674368), tzone = "CET",
tclass = c("POSIXct", "POSIXt")), class = c("xts", "zoo"),
.indexCLASS = c("POSIXct", "POSIXt"), tclass = c("POSIXct", "POSIXt"),
.indexTZ = "CET", tzone = "CET")
时间序列不是等距的。当我键入以下命令时:
last(trades["/2014-05-10 00:26:08"], "5 minutes")
我会 expext 从时间间隔(2014-05-10 00:26:08 减去 5 分钟,2014-05-10 00:26:08)获取所有数据。
但是,我得到以下结果:
id type price size api
2014-05-10 00:15:21 "37119741" "BID" "441.490" " 0.10000000" "TRUE"
2014-05-10 00:15:21 "37119742" "BID" "441.500" " 1.81700000" "TRUE"
2014-05-10 00:16:04 "37119756" "ASK" "439.736" " 0.02220000" "TRUE"
2014-05-10 00:16:50 "37119774" "BID" "439.736" " 0.02344690" "TRUE"
2014-05-10 00:16:50 "37119775" "BID" "441.400" " 2.48155000" "TRUE"
2014-05-10 00:22:52 "37119834" "ASK" "439.645" " 0.27300000" "TRUE"
2014-05-10 00:22:52 "37119835" "ASK" "439.643" " 0.03800000" "TRUE"
2014-05-10 00:22:52 "37119836" "ASK" "439.642" " 3.08528000" "TRUE"
2014-05-10 00:25:33 "37119850" "BID" "441.400" " 0.58249500" "TRUE"
2014-05-10 00:25:33 "37119851" "BID" "441.400" " 0.01000000" "TRUE"
2014-05-10 00:25:35 "37119852" "ASK" "441.400" " 0.06890000" "TRUE"
2014-05-10 00:25:53 "37119853" "ASK" "441.400" " 0.21880700" "TRUE"
2014-05-10 00:26:08 "37119854" "ASK" "440.960" " 0.01000000" "TRUE"
2014-05-10 00:26:08 "37119855" "BID" "441.499" " 0.07050000" "TRUE"
2014-05-10 00:26:08 "37119856" "BID" "441.500" " 0.81398300" "TRUE"
但是输入这个:
last(trades["/2014-05-10 00:26:08"], "2 minutes")
给出正确的结果:
id type price size api
2014-05-10 00:25:33 "37119850" "BID" "441.400" " 0.58249500" "TRUE"
2014-05-10 00:25:33 "37119851" "BID" "441.400" " 0.01000000" "TRUE"
2014-05-10 00:25:35 "37119852" "ASK" "441.400" " 0.06890000" "TRUE"
2014-05-10 00:25:53 "37119853" "ASK" "441.400" " 0.21880700" "TRUE"
2014-05-10 00:26:08 "37119854" "ASK" "440.960" " 0.01000000" "TRUE"
2014-05-10 00:26:08 "37119855" "BID" "441.499" " 0.07050000" "TRUE"
2014-05-10 00:26:08 "37119856" "BID" "441.500" " 0.81398300" "TRUE"
但是话又说回来,命令:
last(trades["/2014-05-10 00:26:08"], "120 seconds")
应该给出与上面相同的结果,但事实并非如此。问题在哪里??
最佳答案
如果您的数据不规则,
last.xts
似乎不能很好地处理字符 n
。也许试试这样的方法?
> trades[paste(end(trades)-60*5, end(trades), sep="/"),]
id type price size api
2014-05-10 00:22:52 "37119834" "ASK" "439.645" "0.2730000" "TRUE"
2014-05-10 00:22:52 "37119835" "ASK" "439.643" "0.0380000" "TRUE"
2014-05-10 00:22:52 "37119836" "ASK" "439.642" "3.0852800" "TRUE"
2014-05-10 00:25:33 "37119850" "BID" "441.400" "0.5824950" "TRUE"
2014-05-10 00:25:33 "37119851" "BID" "441.400" "0.0100000" "TRUE"
2014-05-10 00:25:35 "37119852" "ASK" "441.400" "0.0689000" "TRUE"
2014-05-10 00:25:53 "37119853" "ASK" "441.400" "0.2188070" "TRUE"
2014-05-10 00:26:08 "37119854" "ASK" "440.960" "0.0100000" "TRUE"
2014-05-10 00:26:08 "37119855" "BID" "441.499" "0.0705000" "TRUE"
2014-05-10 00:26:08 "37119856" "BID" "441.500" "0.8139830" "TRUE"
关于r - 在 R 中子集 xts,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23595432/
我需要将文本放在 中在一个 Div 中,在另一个 Div 中,在另一个 Div 中。所以这是它的样子: #document Change PIN
奇怪的事情发生了。 我有一个基本的 html 代码。 html,头部, body 。(因为我收到了一些反对票,这里是完整的代码) 这是我的CSS: html { backgroun
我正在尝试将 Assets 中的一组图像加载到 UICollectionview 中存在的 ImageView 中,但每当我运行应用程序时它都会显示错误。而且也没有显示图像。 我在ViewDidLoa
我需要根据带参数的 perl 脚本的输出更改一些环境变量。在 tcsh 中,我可以使用别名命令来评估 perl 脚本的输出。 tcsh: alias setsdk 'eval `/localhome/
我使用 Windows 身份验证创建了一个新的 Blazor(服务器端)应用程序,并使用 IIS Express 运行它。它将显示一条消息“Hello Domain\User!”来自右上方的以下 Ra
这是我的方法 void login(Event event);我想知道 Kotlin 中应该如何 最佳答案 在 Kotlin 中通配符运算符是 * 。它指示编译器它是未知的,但一旦知道,就不会有其他类
看下面的代码 for story in book if story.title.length < 140 - var story
我正在尝试用 C 语言学习字符串处理。我写了一个程序,它存储了一些音乐轨道,并帮助用户检查他/她想到的歌曲是否存在于存储的轨道中。这是通过要求用户输入一串字符来完成的。然后程序使用 strstr()
我正在学习 sscanf 并遇到如下格式字符串: sscanf("%[^:]:%[^*=]%*[*=]%n",a,b,&c); 我理解 %[^:] 部分意味着扫描直到遇到 ':' 并将其分配给 a。:
def char_check(x,y): if (str(x) in y or x.find(y) > -1) or (str(y) in x or y.find(x) > -1):
我有一种情况,我想将文本文件中的现有行包含到一个新 block 中。 line 1 line 2 line in block line 3 line 4 应该变成 line 1 line 2 line
我有一个新项目,我正在尝试设置 Django 调试工具栏。首先,我尝试了快速设置,它只涉及将 'debug_toolbar' 添加到我的已安装应用程序列表中。有了这个,当我转到我的根 URL 时,调试
在 Matlab 中,如果我有一个函数 f,例如签名是 f(a,b,c),我可以创建一个只有一个变量 b 的函数,它将使用固定的 a=a1 和 c=c1 调用 f: g = @(b) f(a1, b,
我不明白为什么 ForEach 中的元素之间有多余的垂直间距在 VStack 里面在 ScrollView 里面使用 GeometryReader 时渲染自定义水平分隔线。 Scrol
我想知道,是否有关于何时使用 session 和 cookie 的指南或最佳实践? 什么应该和什么不应该存储在其中?谢谢! 最佳答案 这些文档很好地了解了 session cookie 的安全问题以及
我在 scipy/numpy 中有一个 Nx3 矩阵,我想用它制作一个 3 维条形图,其中 X 轴和 Y 轴由矩阵的第一列和第二列的值、高度确定每个条形的 是矩阵中的第三列,条形的数量由 N 确定。
假设我用两种不同的方式初始化信号量 sem_init(&randomsem,0,1) sem_init(&randomsem,0,0) 现在, sem_wait(&randomsem) 在这两种情况下
我怀疑该值如何存储在“WORD”中,因为 PStr 包含实际输出。? 既然Pstr中存储的是小写到大写的字母,那么在printf中如何将其给出为“WORD”。有人可以吗?解释一下? #include
我有一个 3x3 数组: var my_array = [[0,1,2], [3,4,5], [6,7,8]]; 并想获得它的第一个 2
我意识到您可以使用如下方式轻松检查焦点: var hasFocus = true; $(window).blur(function(){ hasFocus = false; }); $(win
我是一名优秀的程序员,十分优秀!