# [R] Data reshaping with conditions

Jim Lemon drjimlemon at gmail.com
Thu Apr 21 01:22:41 CEST 2016

```Hi sri,
As your problem involves a few logical steps, I found it easier to
approach it in a stepwise way. Perhaps there are more elegant ways to
accomplish this.

117 335 sally A
19 335 sally A
167 335 sally B
18 340 susan A
56 340 susan A
22 340 susan B
53 340 susan B
135 351 lee A
114 351 lee A
84 351 lee A
80 351 lee A
19 351 lee A
8 351 lee A
21 351 lee A
88 351 lee B
111 351 lee B
46 351 lee B
# you can also do this with other reshape functions
library(prettyR)
svdatstr<-stretch_df(svdat,"id",c("Count","type"))
count_ind<-grep("Count",names(svdatstr))
type_ind<-grep("type",names(svdatstr))
svdatstr\$maxA<-NA
svdatstr\$maxB<-NA
svdatstr\$x<-NA
svdatstr\$y<-NA
for(row in 1:nrow(svdatstr)) {
svdatstr[row,"maxA"]<-
max(svdatstr[row,count_ind[as.logical(match(svdatstr[1,type_ind],"A",0))]])
svdatstr[row,"maxB"]<-
max(svdatstr[row,count_ind[as.logical(match(svdatstr[1,type_ind],"B",0))]])
svdatstr[row,"x"]<-svdatstr[row,"maxA"] < svdatstr[row,"maxB"]
svdatstr[row,"y"]<-!svdatstr[row,"x"]
}
svdatstr

You can then just extract the columns that you need.

Jim

On Wed, Apr 20, 2016 at 3:03 PM, sri vathsan <srivibish at gmail.com> wrote:
> Dear All,
>
> I am trying to reshape the data with some conditions. A small part of the
> data looks like below. Like this there will be more data with repeating ID.
>
> Count id name type
> 117 335 sally A
> 19 335 sally A
> 167 335 sally B
> 18 340 susan A
> 56 340 susan A
> 22 340 susan B
> 53 340 susan B
> 135 351 lee A
> 114 351 lee A
> 84 351 lee A
> 80 351 lee A
> 19 351 lee A
> 8 351 lee A
> 21 351 lee A
> 88 351 lee B
> 111 351 lee B
> 46 351 lee B
> 108 351 lee B
>
> >From the above data I am expecting an output like below.
>
> id name type count_of_B Max of count B     x               y
> 335 sally B 167 167 117,19      NA
> 340 susan B 22,53 53 18              56
> 351 lee B 88,111,46,108  111 84,80,19,8,2   135,114
>
> Where, the column x and column y are:
>
> x = Count_A_less_than_max of (Count type B)
> y = Count_A_higher_than_max of (Count type B).
>
> *1)* I tried with dplyr with the following code for the initial step to get
> the values for each column.
> *2)*  I thought to transpose the columns which has the unique ID alone.
>
> I tried with the following code and I am struck with the intial step
> itself. The code is executed but higher and lower value of A is not coming.
>
> Expected_output= data %>%
>   group_by(id, Type) %>%
>   mutate(Count_of_B = paste(unlist(count[Type=="B"]), collapse = ","))%>%
>   mutate(Max_of_count_B = ifelse(Type == "B", max(count[Type ==
> "B"]),max(count[Type == "A"]))) %>%
>   mutate(count_type_A_lesser = ifelse
> (Type=="B",(paste(unlist(count[Type=="A"]) < Max_of_count_B[Type=="B"],
> collapse = ",")), "NA"))%>%
>   mutate(count_type_A_higher =
> ifelse(Type=="B",(paste(unlist(count[Type=="A"]) >
> Max_of_count_B[Type=="B"], collapse = ",")), "NA"))
>
> I hope I make my point clear. Please bare with the code, as I am new to
> this.
>
> Regards,
> sri
>
>         [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.

```