Convert to a Class Date but Add to a Data Frame Later On in R -


im trying add column existing data frame dates (2010-01-03, 2010-01-02, .. ), says day of week date (sunday, monday..). had issues converting "to class 'date'" , making column data frame instead of characters.

i got dataframe here (2009-01-03 2010-01-02)

chart_2009 <- read.csv('bchain-avbls (3).csv') chart_2009_days = data.frame(date=c(chart_2009[1])) chart_2009_days["2009 days of week"] <- na chart_2009_days[2] <- weekdays(as.date(chart_2009[1]))

adding column data.frame simple as

## create dummy data.frame df <- data.frame(date = c("2010-01-03", "2010-01-02")) df #         date # 1 2010-01-03 # 2 2010-01-02  ## add new column df$newcolumn <- c("new", "column") df #         date newcolumn # 1 2010-01-03       new # 2 2010-01-02    column

so there's no need create new object chart_2009_days, can append column directly

chart_2009$days <- weekdays(as.date(chart_2009[, 1]))

noting it's better reference columns name, rather number, better 

## haven't seen actual data i'm guessing column name here chart_2009$days <- weekdays(as.date(chart_2009[, "date_column"]))

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