How do I reshape this data?-CodePudding

Hoping someone can help me.

I have this dataset: enter image description here

I want to produce a dataframe exactly like this:

enter image description here

I've tried so many different ways using tidyverse, baseR to do this, but I can't seem to find a solution.

Can anyone please help?

CodePudding user response：

Maybe something like

df %>% pivot_longer(cols = -Subject, names_to = c("Gender", "Age"), names_sep = "_")

But without any pasteable sample data, it's hard to check.

CodePudding user response：

Please read about how to ask a good question and how to give a reproducible example. Sharing data as screenshot is not the correct way to get help.

For reproducibility I have created a sample dataset by hand which is similar to your data.

df <- data.frame(Subject = c('ID986', 'ID407'), M_22_25 = c(4, 5), 
                 M_31_35 = NA, F_31_35 = NA, M_26_30 = c(2, 3))
df

#  Subject M_22_25 M_31_35 F_31_35 M_26_30
#1   ID986       4      NA      NA       2
#2   ID407       5      NA      NA       3

You can use tidyr::pivot_longer to get data in required structure.

tidyr::pivot_longer(df, 
                    cols = -Subject, 
                    names_to = c('Gender', 'Age'), 
                    names_pattern = '(M|F)_(.*)', 
                    values_drop_na = TRUE)

#  Subject Gender Age   value
#  <chr>   <chr>  <chr> <dbl>
#1 ID986   M      22_25     4
#2 ID986   M      26_30     2
#3 ID407   M      22_25     5
#4 ID407   M      26_30     3