r - Add vertical lines to quantmod::chart_Series -


i want add vertical lines on several dates on graph. far haven't managed achieve simple task. tried: 

> s <- get(getsymbols('nvmi'))["2012::"] > d1 <- index(s[100]) > d1 [1] "2012-05-24"  > chart_series(s,ta="addlines(v=d1)") error in get.current.chob() : improperly set or missing graphics device  > chart_series(s) > abline(v=d1)  # nothing  > add_ta("addlines(v=d1") error in `[.data.frame`(lenv$xdata, env$xsubset) :    undefined columns selected

from have read here, know abline not supposed work new chart_series function. doesn't seem work anyway. addlines function not work in of forms tried - plain addlines, plot(addlines(...)), chart_series(..., ta="addlines(...)") or add_ta("addlines(...)").

i need use experimental version of quantmod because solved other problems had old version. d1 list of dates.

you can't mix functions old , new versions of quantmod's charting functions. if want use addlines, have use chartseries. if use addlines , chartseries, d1 should xts object, not datetime object. example:

library(quantmod) data(sample_matrix) s <- as.xts(sample_matrix) chartseries(s,ta="addlines(v=s[100])")

quantmod::chartseries

if want add vertical line using chart_series, create logical xts object true values want lines appear , false otherwise. example:

l <- xts(!as.logical(s[,1]),index(s)) l[100] <- true chart_series(s,ta="add_ta(l,on=1)")

quantmod::chart_series

also note can put vertical line "behind" chart using on=-1 in add_ta call:

chart_series(s,ta="add_ta(l,on=-1,col='grey',border='grey')")

Comments

Post a Comment

Popular posts from this blog

get url and add instance to a model with prefilled foreign key :django admin -

Image
i have page in each contest shown in row. each row contains contest id , link other model names have foreign key contest. news model: class news(models.model): title = models.charfield(max_length=50, null=true) description = models.textfield() time = models.timefield( default= datetime.datetime.now().time()) contest = models.foreignkey(contest) i want use admin adding , changing these models. want when user clicks on 'news' has foreign key contest id=1, shows list of news value foreign key. use {% instance in instances %} <tr class="{% cycle 'row1' 'row2' %}"> <td>{{ instance.title }}</td> <td>{{ instance.starttime }}</td> <td>{{ instance.timespan }}</td> <td>{{ instance.date }}</td> <td><a href="/adm...
Read more

css - Make div keyboard-scrollable in jQuery Mobile? -

from can tell, although jquery-mobile-powered pages can contain divs overflow set scroll or auto, , these divs can scrolled one-screen bar or mouse wheel, cannot scrolled using arrow keys, page-up/page-down, or home/end. instead, official "page" div (with data-role="page") absorbs input. perhaps other divs can't acquire focus, i'm not sure. is there way around this? edit: jsfiddle of simple example: https://jsfiddle.net/qogz0shx/ <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"> </script> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"/> <style> #outer { overflow:scroll; height: 50vh; width: 50vw; } #inner { height: 500vh; width: 500vw; } ...
Read more

ruby on rails - Seeing duplicate requests handled with Unicorn -

recently upgraded our ec2 instances c3.large in order boost more unicorn workers handle increased traffic our site. (6xworkers per machine - 2 ec2 instances). when did this, started seeing duplicate records being created! looks somehow, maybe 2 unicorn workers attempting process same request? in nginx logs see 1 [post] request particular rails controller - yet 2 records being created in database. i'm hitting kind of race condition issue - have no idea how debug this. doesn't happen time, when it's frustrating well. noticed 2 database records within 5 seconds of each other. (and yes disable button when user clicks submit button). unicorn 4.8.2 ruby 1.9.3 rails 3.2.14 any great! thanks! although may not fix problem, upgrade ruby 2.0.0. there blog mentioning idea upgrade ruby 2.0.0 if using unicorn. for example: https://www.digitalocean.com/community/articles/how-to-optimize-unicorn-workers-in-a-ruby-on-rails-app specifically: if using ruby 1.9, ...
Read more