[R] Help with reshape/reshape2 needed
Jim Lemon
drjimlemon at gmail.com
Thu Jul 6 00:46:45 CEST 2017
Oops, that should have been:
stretch_df(tadf,"V1","V2")
Jim
On Thu, Jul 6, 2017 at 8:38 AM, Jim Lemon <drjimlemon at gmail.com> wrote:
> Hi Tom,
> Or perhaps:
>
> #assume the data frame is named "tadf"
> library(prettyR)
> stretch_df(tadf,1,2)
>
> Jim
>
>
> On Thu, Jul 6, 2017 at 6:50 AM, Ista Zahn <istazahn at gmail.com> wrote:
>> The reason it doesn't work easily with reshape/reshape2 is that the
>> order of the rows is not determined. Your answer could be
>>
>> 1957 1958 ... 1985 1986
>> 0.8625000 0.7500000 ... 0.7307692 0.23750000
>> 0.0733945 0.6435644 ... NA 0.05769231
>> 0.5096154 NA ... NA 0.65137615
>>
>> or
>>
>> 1957 1958 ... 1985 1986
>> 0.0733945 0.6435644 ... NA 0.05769231
>> 0.8625000 0.7500000 ... 0.7307692 0.23750000
>> 0.5096154 NA ... NA 0.65137615
>>
>> or
>>
>> 1957 1958 ... 1985 1986
>> 0.8625000 0.6435644 ... NA 0.23750000
>> 0.0733945 NA 0.7307692 0.05769231
>> 0.5096154 0.7500000 ... NA 0.65137615
>>
>> or any other combination of orders. You might not care about the
>> order, but reshape does.
>>
>> The usual way around it is to just make up an order variable, e.g.,
>> assuming your data.frame is named "example_data" and the columns are
>> named "year" and "score":
>>
>> example_data <- do.call(rbind,
>> lapply(split(example_data,
>> example_data$year),
>> transform,
>> obs = seq_along(year)))
>>
>> dcast(example_data,
>> obs ~ year,
>> value.var = "score")
>>
>> Best,
>> Ista
>>
>>
>> On Wed, Jul 5, 2017 at 2:16 PM, Thomas Adams <tea3rd at gmail.com> wrote:
>>> Hi all:
>>>
>>> I'm struggling with getting my data re-formatted using functions in
>>> reshape/reshape2 to get from:
>>>
>>> 1957 0.862500000
>>> 1958 0.750000000
>>> 1959 0.300000000
>>> 1960 0.287500000
>>> 1963 0.675000000
>>> 1964 0.937500000
>>> 1965 0.025000000
>>> 1966 0.387500000
>>> 1969 0.087500000
>>> 1970 0.275000000
>>> 1973 0.500000000
>>> 1974 0.362500000
>>> 1976 0.925000000
>>> 1978 0.712500000
>>> 1979 0.337500000
>>> 1980 0.700000000
>>> 1981 0.425000000
>>> 1982 0.212500000
>>> 1983 0.312500000
>>> 1986 0.237500000
>>> 1958 0.643564356
>>> 1963 0.250000000
>>> 1968 0.211538462
>>> 1976 0.317307692
>>> 1981 0.673076923
>>> 1985 0.730769231
>>> 1986 0.057692308
>>> 1957 0.073394495
>>> 1966 0.742574257
>>> 1961 0.082568807
>>> 1964 0.165137615
>>> 1965 0.137614679
>>> 1959 0.128712871
>>> 1968 0.587155963
>>> 1969 0.660550459
>>> 1970 0.477064220
>>> 1971 0.513761468
>>> 1973 0.449541284
>>> 1974 0.128440367
>>> 1968 0.415841584
>>> 1977 0.009174312
>>> 1979 0.339449541
>>> 1981 0.596330275
>>> 1982 0.348623853
>>> 1984 0.146788991
>>> 1986 0.651376147
>>> 1959 0.451923077
>>> 1965 0.750000000
>>> 1962 0.326732673
>>> 1964 0.782178218
>>> 1970 0.336538462
>>> 1975 0.277227723
>>> 1978 0.712871287
>>> 1957 0.509615385
>>> 1960 0.490384615
>>> 1961 0.721153846
>>> 1966 0.298076923
>>> 1969 0.413461538
>>> 1971 0.500000000
>>> 1972 0.692307692
>>> 1974 0.653846154
>>> 1984 0.049504950
>>> 1978 0.442307692
>>> 1973 0.079207921
>>> 1983 0.355769231
>>> 1984 0.038461538
>>> 1979 0.237623762
>>> 1982 0.564356436
>>>
>>> to:
>>>
>>> 1957 1958 1959 1960 ...
>>> 1985 1986
>>> 0.509615385 0.750000000 0.451923077 0.287500000 ...
>>> 0.651376147
>>> 0.509615385
>>>
>>> and so on. It's likely the column lengths will be different, so I'm
>>> guessing padding with NAs will be needed. I have on the order of 1335 rows
>>> with years spanning 1957 to 2016.
>>>
>>> Thank you...
>>> Tom
>>>
>>> --
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
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>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
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