Create new fields based on condition and append that output df to another df

[sten]

I am trying to create new fields from a df based on if the conditions match. Below is the df I am trying to use.

abc<- tibble::tribble(
  ~type,               ~match_type, ~count,
  "type b", "alpha",           2,
  "type a", "alpha",           4,
  "type b",           "alpha",           1,
  "type a",           "alpha",           2,
  "type a",    "beta",          32,
  "type a",    "beta",          40,
  "type a",    "beta",          39,
  "type a",    "beta",          40,
  "type a",    "beta",          55,
  "type b",    "beta",          66,
  "type b",    "beta",          35,
  "type b",    "beta",          72,
  "type b",    "beta",          54,
  "type b",    "beta",          30,
  "type b",    "beta",          22,
  "type b",    "beta",          24,
  "type b",    "beta",          13,
  "type b",    "beta",          32,
  "type b",    "beta",          18,
  "type b",    "beta",          40
)

Now if match_type is alpha then create a new field called alpha and sum up the count numbers there and similar for beta.

This is what I have tried so far and the error which I get.

abc %>%  mutate(alpha=(count[match_type =="alpha"]),
                beta=(count[match_type =="beta"]))

Error: `mutate()` argument `alpha` must be recyclable.
ℹ `alpha` is `(count[match_type == "alpha"])`.
x `alpha` can't be recycled to size 20.
ℹ `alpha` must be size 20 or 1, not 4.

I am trying to create a new df like this (the numbers might not add up in this example)

result <- tibble::tribble(
  ~type,               ~alpha, ~beta,
  "type b", 22,           2,
  "type a", 12,           4
)

Once I get this above df I want to insert those values in this dataframe based on the field type which as of now are na.

final_df <-tibble::tribble(
  ~type,               ~alpha, ~beta, val1 ,val2,
  "type b", na,           na, 4,5,
  "type a", na,           na,3,2,
  "type c", 22,           2,2,3,
  "type d", 12,           4,12,12,
  "type e", 22,           2,4,5,
  "type f", 12,           4,3,4
)

Am I doing too many steps. is there a simple way to do it.Thank you

[FJCC]

I think this accomplishes the first part of your description. I do not understand the next part. Could you try explaining that again?

library(tibble)
library(dplyr)
#> 
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union
library(tidyr)
abc<- tibble::tribble(
  ~type,               ~match_type, ~count,
  "type b", "alpha",           2,
  "type a", "alpha",           4,
  "type b",           "alpha",           1,
  "type a",           "alpha",           2,
  "type a",    "beta",          32,
  "type a",    "beta",          40,
  "type a",    "beta",          39,
  "type a",    "beta",          40,
  "type a",    "beta",          55,
  "type b",    "beta",          66,
  "type b",    "beta",          35,
  "type b",    "beta",          72,
  "type b",    "beta",          54,
  "type b",    "beta",          30,
  "type b",    "beta",          22,
  "type b",    "beta",          24,
  "type b",    "beta",          13,
  "type b",    "beta",          32,
  "type b",    "beta",          18,
  "type b",    "beta",          40
)
Summary <- abc %>% group_by(type, match_type) %>% 
  summarize(Count = n())
Summary
#> # A tibble: 4 x 3
#> # Groups:   type [2]
#>   type   match_type Count
#>   <chr>  <chr>      <int>
#> 1 type a alpha          2
#> 2 type a beta           5
#> 3 type b alpha          2
#> 4 type b beta          11
SummaryWide <- pivot_wider(Summary, names_from = match_type, values_from = Count)
SummaryWide
#> # A tibble: 2 x 3
#> # Groups:   type [2]
#>   type   alpha  beta
#>   <chr>  <int> <int>
#> 1 type a     2     5
#> 2 type b     2    11

^{Created on 2020-04-14 by the reprex package (v0.3.0)}