library(WDI)
veri <- WDI(country = "AZ",indicator = c ("AG.LND.FRST.ZS","NY.GDP.MKTP.CD"))
str(veri)
## 'data.frame':    63 obs. of  6 variables:
##  $ country       : chr  "Azerbaijan" "Azerbaijan" "Azerbaijan" "Azerbaijan" ...
##  $ iso2c         : chr  "AZ" "AZ" "AZ" "AZ" ...
##  $ iso3c         : chr  "AZE" "AZE" "AZE" "AZE" ...
##  $ year          : int  1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 ...
##  $ AG.LND.FRST.ZS: num  NA NA NA NA NA NA NA NA NA NA ...
##   ..- attr(*, "label")= chr "Forest area (% of land area)"
##  $ NY.GDP.MKTP.CD: num  NA NA NA NA NA NA NA NA NA NA ...
##   ..- attr(*, "label")= chr "GDP (current US$)"
library(tidyverse)
## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
## ✔ dplyr     1.1.4     ✔ readr     2.1.5
## ✔ forcats   1.0.0     ✔ stringr   1.5.1
## ✔ ggplot2   3.5.0     ✔ tibble    3.2.1
## ✔ lubridate 1.9.3     ✔ tidyr     1.3.1
## ✔ purrr     1.0.2     
## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag()    masks stats::lag()
## ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors
library(tidyr)
library(dplyr)
library(explore)
countries <- unique(veri$country)
veri %>% describe_all()
## # A tibble: 6 × 8
##   variable       type     na na_pct unique         min          mean         max
##   <chr>          <chr> <int>  <dbl>  <int>       <dbl>         <dbl>       <dbl>
## 1 country        chr       0    0        1        NA            NA      NA      
## 2 iso2c          chr       0    0        1        NA            NA      NA      
## 3 iso3c          chr       0    0        1        NA            NA      NA      
## 4 year           int       0    0       63      1960          1991       2.02e 3
## 5 AG.LND.FRST.ZS dbl      33   52.4     31        11.4          12.4     1.38e 1
## 6 NY.GDP.MKTP.CD dbl      30   47.6     34 444658672.  29420997153.      7.87e10
veri2 <- WDI_data$country
veri <- left_join(veri, veri2)
## Joining with `by = join_by(country, iso2c, iso3c)`
veri3 <- veri%>%filter(region!="aggregates")
veri3 %>% describe_all()
## # A tibble: 12 × 8
##    variable       type     na na_pct unique         min          mean        max
##    <chr>          <chr> <int>  <dbl>  <int>       <dbl>         <dbl>      <dbl>
##  1 country        chr       0    0        1        NA            NA     NA      
##  2 iso2c          chr       0    0        1        NA            NA     NA      
##  3 iso3c          chr       0    0        1        NA            NA     NA      
##  4 year           int       0    0       63      1960          1991      2.02e 3
##  5 AG.LND.FRST.ZS dbl      33   52.4     31        11.4          12.4    1.38e 1
##  6 NY.GDP.MKTP.CD dbl      30   47.6     34 444658672.  29420997153.     7.87e10
##  7 region         chr       0    0        1        NA            NA     NA      
##  8 capital        chr       0    0        1        NA            NA     NA      
##  9 longitude      chr       0    0        1        NA            NA     NA      
## 10 latitude       chr       0    0        1        NA            NA     NA      
## 11 income         chr       0    0        1        NA            NA     NA      
## 12 lending        chr       0    0        1        NA            NA     NA
veri3 <- veri3 %>% filter(year >= 1992)
veri3 %>% describe_all()
## # A tibble: 12 × 8
##    variable       type     na na_pct unique         min          mean        max
##    <chr>          <chr> <int>  <dbl>  <int>       <dbl>         <dbl>      <dbl>
##  1 country        chr       0    0        1        NA            NA     NA      
##  2 iso2c          chr       0    0        1        NA            NA     NA      
##  3 iso3c          chr       0    0        1        NA            NA     NA      
##  4 year           int       0    0       31      1992          2007      2.02e 3
##  5 AG.LND.FRST.ZS dbl       1    3.2     31        11.4          12.4    1.38e 1
##  6 NY.GDP.MKTP.CD dbl       0    0       31 444658672.  30860130889.     7.87e10
##  7 region         chr       0    0        1        NA            NA     NA      
##  8 capital        chr       0    0        1        NA            NA     NA      
##  9 longitude      chr       0    0        1        NA            NA     NA      
## 10 latitude       chr       0    0        1        NA            NA     NA      
## 11 income         chr       0    0        1        NA            NA     NA      
## 12 lending        chr       0    0        1        NA            NA     NA
bos_sayi <- veri3 %>% group_by(country) %>% summarise(sayi=sum(is.na("NY.GDP.MKTP.CD")))
veri3 <-left_join(veri3, bos_sayi)
## Joining with `by = join_by(country)`
veri3 <- veri3 %>% filter(sayi<1)
veri3 %>% describe_all()
## # A tibble: 13 × 8
##    variable       type     na na_pct unique         min          mean        max
##    <chr>          <chr> <int>  <dbl>  <int>       <dbl>         <dbl>      <dbl>
##  1 country        chr       0    0        1        NA            NA     NA      
##  2 iso2c          chr       0    0        1        NA            NA     NA      
##  3 iso3c          chr       0    0        1        NA            NA     NA      
##  4 year           int       0    0       31      1992          2007      2.02e 3
##  5 AG.LND.FRST.ZS dbl       1    3.2     31        11.4          12.4    1.38e 1
##  6 NY.GDP.MKTP.CD dbl       0    0       31 444658672.  30860130889.     7.87e10
##  7 region         chr       0    0        1        NA            NA     NA      
##  8 capital        chr       0    0        1        NA            NA     NA      
##  9 longitude      chr       0    0        1        NA            NA     NA      
## 10 latitude       chr       0    0        1        NA            NA     NA      
## 11 income         chr       0    0        1        NA            NA     NA      
## 12 lending        chr       0    0        1        NA            NA     NA      
## 13 sayi           int       0    0        1         0             0      0