如何创建模式向量='日期'

时间:2016-07-11 16:34:15

标签: r

我想在函数中使用下面的行

datehit <- vector(mode="Date",length(vectordiagdate))

但我收到错误

> Error in vector(mode = "Date", length(vectordiagdate)) : 
  vector: cannot make a vector of mode 'Date'.

稍后我将使用datediff

有什么问题,是否有解决方法?

2 个答案:

答案 0 :(得分:1)

没有Date的存储模式。

日期是class

date.vec <- seq(Sys.Date(), Sys.Date()+10, 1) # date vector example
mydate   <- as.Date("1970-01-01")  # class conversion from character to date

使用你的例子(松散地):

as.vector(data.frame(x = seq(Sys.Date(),Sys.Date()+10,1)), mode = "list")
            x
1  2016-07-11
2  2016-07-12
3  2016-07-13
4  2016-07-14
5  2016-07-15
6  2016-07-16
7  2016-07-17
8  2016-07-18
9  2016-07-19
10 2016-07-20
11 2016-07-21
datehit <- as.Date(datehit$x)

有效的存储模式是:

  • “logical”
  • “整数”
  • “double”
  • “复杂”
  • “原始”
  • “character”
  • “列表”
  • “表达”
  • “name”
  • “symbol”
  • “功能”

答案 1 :(得分:0)

如果你想要一个类似于经常使用function onDocumentMouseDown( e ) { if(document.activeElement.id != "myThreeJSElementID"){ //some other element has been clicked so let's return with nothing: return; } e.preventDefault(); console.log(dialog); var mouseVector = new THREE.Vector3(); mouseVector.x = 2 * (e.clientX / window.innerWidth ) - 1; mouseVector.y = 1 - 2 * ( e.clientY / window.innerHeight ); var raycaster = new THREE.Raycaster(); raycaster.setFromCamera( mouseVector, camera ); var intersects = raycaster.intersectObjects(objectCollection ); if (intersects.length > 0) { var selectedObject = intersects[0]; console.log("Intersected object", intersects[0]); selectedObject.object.material = (selectedObject.object.material.wireframe) ? selectedBoxMaterial : unselectedBoxMaterial; var text = intersects[0].distance; var title = "Shelf info"; if (dialog == false) { createDialog(title, text, offset); offset = offset - 50; console.log(offset); dialog = true; console.log(dialog); } if (dialog == true) { {jQuery("#bodyText").text(text); } } } 的东西,作为一个模板对象来填写,那么你可以做

vector()

我们无法使用as.Date(rep(NA, length = 10)) > (foo <- as.Date(rep(NA, length = 10))) [1] NA NA NA NA NA NA NA NA NA NA > class(foo) [1] "Date" 作为NULL的对象,因为它会在rep上发出警告以惹恼我们as.Date窒息。