r - Divide case by population -


in table2 dataset tidyr package, have: 

  country  year       type      count          <chr> <int>      <chr>      <int>  1 afghanistan  1999      cases        745  2 afghanistan  1999 population   19987071  3 afghanistan  2000      cases       2666  4 afghanistan  2000 population   20595360  5      brazil  1999      cases      37737  6      brazil  1999 population  172006362  7      brazil  2000      cases      80488  8      brazil  2000 population  174504898  9       china  1999      cases     212258 10       china  1999 population 1272915272 11       china  2000      cases     213766 12       china  2000 population 1280428583

how code can divide type cases type population , multiply 10000. (yes, question r data science hadley wickham.)

i've thought of: 

sum_1 <- vector() (i,j in 1:nrow(table2)) {   if (i %% 2 != 0) {     sum_1 <- (table2[i] / table2[j]) * 10000

assuming there 2 values 'type' each 'country', 'year', after grouping 'country', 'year', arrange 'type' (in case order different) , divide first value of 'count' last value of 'count' create 'newcol'

library(dplyr) table2 %>%     group_by(country, year) %>%     arrange(country, year, type) %>%      mutate(newcol = 10000*first(count)/last(count))

if need summarised output, replace mutate summarise

if there other values in type in addition 'cases' , 'population', subset 'count' based on logical index

table2 %>%     group_by(country, year) %>%     mutate(newcol = 10000*count[type=="cases"]/count[type=="population"])

here, assumption there single 'cases' , 'population' per each 'country', 'year'


Comments

Post a Comment

Popular posts from this blog

ubuntu - PHP script to find files of certain extensions in a directory, returns populated array when run in browser, but empty array when run from terminal -

i running os ububtu 16.04. ultimate goal able run php script cron job every minute. here php script located @ /var/www/html/tests/test/index.php : <?php $directorypath = $_server['document_root']."/tests/test/data/"; echo "directorypath: $directorypath<br><br>";//check $imagefilepathsarray = glob($directorypath . "*.{png,gif}", glob_brace); echo "<br><br>imagefilepathsarray: "; print_r($imagefilepathsarray);//check ?> when open php script in browser visiting url my-ip-address/tests/test/index.php , get: directorypath: /var/www/html/tests/test/data/ imagefilepathsarray:array( [0] => /var/www/html/tests/test/data/pic.png [1] => /var/www/html/tests/test/data/pic.gif ) before writing cron job in crontab file, need check if can run anywhere using terminal . opened ubuntu terminal @ /home/ location, , executed in terminal: sudo php /var/www/html/tests/test/index.php i got following out...
Read more

php - How can i create a user dashboard -

today have questions you, want create user dashboard site, include (obviously), users data, example -email -username -and others stuff how can information, , print them in html page? if can, how can these information via php sessions? shuld use session? example, if user login, , start new session ( session_start() ), how can data print in dashboard? should use php "project"? in advice, have day , thank time!
Read more

javascript - How to detect toggling of the fullscreen-toolbar in jQuery Mobile? -

i have jquery mobile page fixed full-screen toolbar, data-tap-toggle enabled. straight under toolbar have positioned banner should slide upwards when toolbar hiding , slide downward when toolbar showing. jquery mobile toggles toolbar applying , removing ui-fixed-hidden class - sadly, can't find in documentation of toolbar widget toggle , hide or show event that. how can detect when toolbar toggled, reposition banner? .banner { position: fixed; background-color: darkseagreen; top: 46px; min-height: 48px; width: 100%; text-align: center; line-height: 48px; } <!doctype html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"> <script src="https://code.jquery.com/jquery-1....
Read more