[R] How to create an array of list?
Gang Chen
gangchen at mail.nih.gov
Fri Nov 9 00:31:30 CET 2007
Thanks again for the response!
For example, I want to run the following
> contrast(fit.lme, list(Trust="U", Sex=levels(Model$Sex),
Freq=levels(Model$Freq)), list(Trust="T", Sex=levels(Model$Sex),
Freq=levels(Model$Freq)))
The 2nd and 3rd arguments are two lists that I'm trying to construct
based on the data frame 'Model'. Of course I could provide the two
lists explicitly as the above command. However for a general usage, I
would like to build the two lists from the user's input. That is how
the issue of creating an array of list came about. In the example I
provided, it would run 7 separate contrasts line the one shown above,
each of which contains 2 lists, and each list has 3 named components
(Trust, Sex, and Freq) each of which is of unequal components
(depending on the contrast specification). And that is why I wanted
to have an array of 7 X 2 X 3.
Hope this is clearer. Any better solutions?
Thanks,
Gang
On Nov 8, 2007, at 6:18 PM, jim holtman wrote:
> I am still not sure what you expect as output. Can you provide an
> example of what you think that you need. What is it that you are
> trying to construct? How do you then plan to use them? There might
> be other ways of going about it if we knew what the intent was -- what
> is the structure that you are trying to create? The code that you
> have is probably having problems with the number of elements in the
> replacement, so to see what the alternatives are, can you give an
> explicit example of what you would like as an outcome and then how you
> intend to use it.
>
> On Nov 8, 2007 5:19 PM, Gang Chen <gangchen at mail.nih.gov> wrote:
>> Thanks for the response!
>>
>> I want to create those lists so that I could use them in a function
>> ('contrast' in contrast package) as arguments.
>>
>> Any suggestions?
>>
>> Thanks,
>> Gang
>>
>> On Nov 8, 2007, at 5:12 PM, jim holtman wrote:
>>
>>> Can you tell us what you want to do, and not how you want to do it.
>>> Without the data it is hard to see. Some of your indexing probably
>>> does not have the correct number of parameters when trying to do the
>>> replacement. An explanation of what you expect the output to be
>>> would
>>> be useful in determining what the script might look like.
>>>
>>> On Nov 8, 2007 4:51 PM, Gang Chen <gangchen at mail.nih.gov> wrote:
>>>> I have trouble creating an array of lists? For example, I want
>>>> to do
>>>> something like this
>>>>
>>>> clist <- array(data=NA, dim=c(7, 2, 3));
>>>> for (n in 1:7) {
>>>> for (ii in 1:2) {
>>>> for (jj in 1:3) {
>>>> if (cc[n, ii, jj] == "0") { clist[n, ii, ][[jj]] <-
>>>> list(levels(MyModel[,colnames(MyModel)[jj]])); }
>>
>>>> else { clist[n, ii, ][[jj]] <- cc[n, ii, jj]; }
>>>> names(clist[n, ii, ][[jj]]) <- colnames(MyModel)[jj];
>>>> }
>>>> }
>>>> }
>>>>
>>>> but I get an error:
>>>>
>>>> Error in `*tmp*`[n, ii, ] : incorrect number of dimensions
>>>>
>>>> Is it because each list has different number of components? The two
>>>> variables involved in the loop, character matrix cc and dataframe
>>>> MyModel are shown below:
>>>>
>>>>> cc
>>>> , , 1
>>>>
>>>> [,1] [,2]
>>>> [1,] "U" "T"
>>>> [2,] "0" "0"
>>>> [3,] "0" "0"
>>>> [4,] "0" "0"
>>>> [5,] "U" "T"
>>>> [6,] "U" "T"
>>>> [7,] "U" "T"
>>>>
>>>> , , 2
>>>>
>>>> [,1] [,2]
>>>> [1,] "0" "0"
>>>> [2,] "M" "F"
>>>> [3,] "0" "0"
>>>> [4,] "0" "0"
>>>> [5,] "0" "0"
>>>> [6,] "0" "0"
>>>> [7,] "0" "0"
>>>>
>>>> , , 3
>>>>
>>>> [,1] [,2]
>>>> [1,] "0" "0"
>>>> [2,] "0" "0"
>>>> [3,] "Lo" "Hi"
>>>> [4,] "No" "Hi"
>>>> [5,] "Hi" "Hi"
>>>> [6,] "Lo" "Lo"
>>>> [7,] "No" "No"
>>>>
>>>>> MyModel
>>>> Trust Sex Freq
>>>> 1 T F Hi
>>>> 2 T F Hi
>>>> 3 T F Hi
>>>> 4 T F Hi
>>>> 5 T F Hi
>>>> 6 T F Hi
>>>> 7 T F Hi
>>>> 8 T F Hi
>>>> 9 T F Lo
>>>> 10 T F Lo
>>>> 11 T F Lo
>>>> 12 T F Lo
>>>> 13 T F Lo
>>>> 14 T F Lo
>>>> 15 T F Lo
>>>> 16 T F Lo
>>>> 17 T F No
>>>> 18 T F No
>>>> 19 T F No
>>>> 20 T F No
>>>> 21 T F No
>>>> 22 T F No
>>>> 23 T F No
>>>> 24 T F No
>>>> 25 T M Hi
>>>> 26 T M Hi
>>>> 27 T M Hi
>>>> 28 T M Hi
>>>> 29 T M Hi
>>>> 30 T M Hi
>>>> 31 T M Hi
>>>> 32 T M Hi
>>>> 33 T M Lo
>>>> 34 T M Lo
>>>> 35 T M Lo
>>>> 36 T M Lo
>>>> 37 T M Lo
>>>> 38 T M Lo
>>>> 39 T M Lo
>>>> 40 T M Lo
>>>> 41 T M No
>>>> 42 T M No
>>>> 43 T M No
>>>> 44 T M No
>>>> 45 T M No
>>>> 46 T M No
>>>> 47 T M No
>>>> 48 T M No
>>>> 49 U F Hi
>>>> 50 U F Hi
>>>> 51 U F Hi
>>>> 52 U F Hi
>>>> 53 U F Hi
>>>> 54 U F Hi
>>>> 55 U F Hi
>>>> 56 U F Hi
>>>> 57 U F Lo
>>>> 58 U F Lo
>>>> 59 U F Lo
>>>> 60 U F Lo
>>>> 61 U F Lo
>>>> 62 U F Lo
>>>> 63 U F Lo
>>>> 64 U F Lo
>>>> 65 U F No
>>>> 66 U F No
>>>> 67 U F No
>>>> 68 U F No
>>>> 69 U F No
>>>> 70 U F No
>>>> 71 U F No
>>>> 72 U F No
>>>> 73 U M Hi
>>>> 74 U M Hi
>>>> 75 U M Hi
>>>> 76 U M Hi
>>>> 77 U M Hi
>>>> 78 U M Hi
>>>> 79 U M Hi
>>>> 80 U M Hi
>>>> 81 U M Lo
>>>> 82 U M Lo
>>>> 83 U M Lo
>>>> 84 U M Lo
>>>> 85 U M Lo
>>>> 86 U M Lo
>>>> 87 U M Lo
>>>> 88 U M Lo
>>>> 89 U M No
>>>> 90 U M No
>>>> 91 U M No
>>>> 92 U M No
>>>> 93 U M No
>>>> 94 U M No
>>>> 95 U M No
>>>> 96 U M No
>>>>
>>>> Thanks,
>>>> Gang
>>>>
>>>> ______________________________________________
>>>> R-help at r-project.org mailing list
>>>> 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.
>>>>
>>>
>>>
>>>
>>> --
>>> Jim Holtman
>>> Cincinnati, OH
>>> +1 513 646 9390
>>>
>>> What is the problem you are trying to solve?
>>
>>
>
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem you are trying to solve?
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