[R] data frame

[Jeffrey Robert Spies]

I believe you're looking for:

dim(a)

dim(a)[1]  # Number of observations, in your example, 12
dim(a)[2]  # Number of variables per observation, in your example, 9

--Jeff.


On Sep 17, 2007, at 12:05 PM, Alfredo Alessandrini wrote:

> Hi everybody,
>
> If I've a data frame like this:
>
> dataframe a
>
>       X0  X2  X4  X6  X8 X10 X12 X14 X16
> 1957   0   0   0   0   0   0   0   0   0
> 1958   0   0   0   0   0   0   0   0   0
> 1959 831   0   0   0   0   0   0   0   0
> 1960 544 282   0   0   0   0   0   0   0
> 1961 446 365   0   0   0   0   0   0   0
> 1962 442 473   0   0   0   0   0   0   0
> 1963 595 468   0   0   0   0   0   0   0
> 1964 400 397 516   0   0   0   0   0   0
> 1965 417 382 401   0   0   0   0   0   0
> 1966 642 518 509 453   0   0   0   0   0
> 1967 505 340 621 458   0   0   0   0   0
> 1968 451 383 428 318 339   0   0   0   0
>
>> length (a)
> [1] 9
>
> I've a questions...
>
> There is a function for show the lenght of single observation?
>
>> ???? (a)
> [1] 12
>
>
>
> Best Wishes,
>
> Alfredo
>
> 	[[alternative HTML version deleted]]
>
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