在SAS中重置临时阵列 [英] Reset a temporary array in SAS

问题描述

在声明数组之后，我想为其余代码重置其值。

After I declares an array, I'd like to reset its values for the rest of the code.

array cutoffs[4] _temporary_ (1 2 3 4); /*works well*/
... use of the array
array cutoffs[3] _temporary_ (3.5 5 7.5); /*Error*/
... use of the updated array

错误为以下：

错误124-185：变量临界值已定义。

ERROR 124-185: The variable cutoffs has already been defined.

此错误非常明显，但我想知道如何在不更改其名称的情况下重新分配数组（这会很繁琐）。

This error is very clear but I wonder how could I reattribute the array without changing its name (which would be most tedious).

我尝试了一些语法，但我自己找不到，而且我在Google或stackoverflow上都没有看到资源。

I tried some syntaxes but couldn't find by myself, and I saw no ressources on google, nor on stackoverflow.

我该怎么办？

编辑：主要目的是我创建了一个函数（使用 proc fcmp ），该函数将数组作为参数并削减了值（例如R的 cut 函数）。该函数将在许多列上使用，但具有不同的截止值，我不想为每个列创建繁琐的数组。

EDIT : the main purpose is that I created a function (with proc fcmp) that take arrays as parameter and cut the value (like R's cut function). The function is to be used on a lot of columns but with different cutoffs, and I don't want to tediously create an array for each and every column.

推荐答案

您可以一个一个地更改截止值数组的值。

You can change the values of the cutoffs array one by one.

array cutoffs{4} _temporary_ (1 2 3 4); /*works well*/
... use of the array
cutoffs[1]=3.5;
cutoffs{2}=5;
cutoffs{3}=7.5;
cutoffs{4}=.;

或者您可以第二次使用另一个名称作为数组。

or you could just use another name for the array the second time.

话虽如此，您使用它的方式似乎有些奇怪。

With that said, the way you are using this seems a bit strange.

编辑：您可以考虑重写您的 proc fcmp 函数期望值列表作为字符串（例如'3.5,5,7.5'）而不是数组，并执行完全删除数组。

you could consider rewriting your proc fcmp function to expect the list of values as a character string (e.g. '3.5,5,7.5') instead of an array and do away with arrays entirely.

您的 proc fcmp 可能会与

do i=1 to dim(array);
  val=array{i};
  ...
end;

类似；

do i=1 to countw(array,',');
  val=input(scan(array,i,','),best32.);
  ...
end;

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