c# - Average int Array elements with a GroupBy -



c# - Average int Array elements with a GroupBy -

i have list of items so:

where each element in list follows same structure. each y property int[] has 3 values.

i doing groupby on list split info 60 sec periods:

var newchart = chart.groupby(x => x.dateadded.roundup(timespan.fromseconds(60)));

roundup extension method got here: how can round time nearest x minutes?

this creates list so, values grouped minute, i'd expect:

so illustration min 20:18 there 5 entries, value may change, may 6 entries, 1 entry , forth.

so question is, how can cast new grouped list type of original list y values has average of entries in grouping by. i've tried next y values contain more 3 entries:

var newchart = chart.groupby(x => x.dateadded.roundup(timespan.fromseconds(60))) .select(x => new chartpoint { dateadded = x.key, x = x.key.tostring(@"hh:mm:ss"), y = x.select(y => (int)math.round(y.y.average(z => z), 0, midpointrounding.awayfromzero)).toarray() });

so example, if entry @ 20:18 had 2 entries, , y values entry 1 was: 3, 4, 5 , values entry 2 were: 5, 10, 11. expect entry @ 20:18 y in new list follows: 4, 7, 8 because: (3+5)/2 = 4, (4+10)/2 = 7, (5+11)/2 = 8

instead of getting average each array in group, create range length of arrays , average corresponding item each array:

var newchart = chart.groupby(x => x.dateadded.roundup(timespan.fromseconds(60))) .select(x => new chartpoint { dateadded = x.key, x = x.key.tostring(@"hh:mm:ss"), y = enumerable.range(0, 3).select(i => (int)math.round(x.average(z => z.y[i]))).toarray() });

c# linq

Comments

Post a Comment

Popular posts from this blog

php - Android app custom user registration and login with cookie using facebook sdk -

php - Android app custom user registration and login with cookie using facebook sdk - i developing android application in users need register , log in using facebook. approximately, flow. open app first time, authenticate facebook, data, send info server create them business relationship in application, start session new business relationship in server, cookie perform later interactions. so far good. what need know wich info have send server, can able identify users when log in seccond time. because need start session in server , send cookie android app farther interactions. i'm using php server side language. i thinking getting getaccesstoken() in android facebook sdk, pass server on business relationship creation , storing in android app. but can't manage how login users on sec time utilize app. any suggestions ? in advance ! to uniquely identify user within app, should create request /me , user's id. guaranteed unique , remain con...
Read more

c# - Create a Notification Object (Email or Page) At Run Time -- Dependency Injection or Factory -

c# - Create a Notification Object (Email or Page) At Run Time -- Dependency Injection or Factory - i have code emails me notification when happens. trying add together page , also remove dependency on email. for reference; have name of notification want send stored string in database. @ runtime have list of people , string representation of want receive. i thought dependency injection ninject, kernel bindings got big , seemed hacking together. then thought simple factory, activator.createinstance(email/page) inotifcation, don't know how handle differing constructor parameters (unless utilize common, complex property, employee, has info need). so far have this: public interface inotification { void sendmessage(); } public class email: inotification { private readonly string _toemailaddress; private string body { { homecoming "email"; } } private static string smtphost { ...
Read more

Set Up Of Common Name Of SSL Certificate To Protect Plesk Panel -

Set Up Of Common Name Of SSL Certificate To Protect Plesk Panel - a pci compliance scanner balking self signed ssl certificate protecting secure access plesk panel contains name mismatch between location of plesk panel , name on certificate, namely self-signed cert's name "parallels" , domain reach plesk 'ip address:8443'. so figured go ahead , free ssl certificate seek fiddle error. when generated certificate used server domain name site name when generated certificate. if visit 'domain name:8443' fine, no ssl warning. if visit 'ip address:8443' (which believe scanner does) certificate name mismatch error, digicert's ssl checker says certificate name should ip address. can generate certificate mutual name ip address? tempted should pci scanner accepts, right mutual name use? run issue before? you can seek subject alternative name extension ip address. also, can maintain "parallels" mutual name, , add together ...
Read more