Matching Data from Different columns / dataframes - Working in R -

-

here sample data

    dataset     id       name      reasonforlogin     123      tom       work     246      timmy     work     789      mark      play     dataset b    id       name      reasonforlogin    789      mark      work    313      sasha     interview    000      meryl     interview    987      dara      play    789      mark      play    246      timmy     work

two datasets. same columns. uneven number of rows.

i want able

1)"i want of id numbers appear in both dataseta , datasetb"

or

2)"i want know how many times 1 id logs in on day, day 2."

so answer

1) list 

    [246, 789]

2) data.frame "header" of ids, , "row" of login numhbers.

    123, 246, 789, 313, 000, 987      0, 1, 2, 1, 1, 1

it seems easy, think non-trivial large data. planned on doing loops-in-loops, i'm sure there has term these kind of comparisons , packages similar things.

if have a first data set , b second, , id character column in both keep 000 being printed 0, can ...

id common both data sets:

intersect(a$id, b$id) # [1] "246" "789"

times id logged in on second day (b), including not logged in @ all:

table(factor(b$id, levels = unique(c(a$id, b$id))))  # 123 246 789 313 000 987  #   0   1   2   1   1   1

Comments

Post a Comment

Popular posts from this blog

javascript - Slick Slider width recalculation -

-
i'm trying add slide in panel on slick container css. carousel works except new width not being calculated when space has been added. recalibrate once advance next slide i'd happen each time panel opened or closed. i've tried adding both margin , padding, neither makes difference. ideas? https://jsfiddle.net/mhigley/dpf7mlpl/ html: <button type="button" id="button"><i class="fa fa-arrow-right"></i></button> <aside> <h2>slide in panel</h2> <ol> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> <li>list item</li> </ol> </aside> <main role="main"> <div class="sections"> <section> <article> <h2>first slide</h2> <p>lorem ipsum d...
Read more

jsf - PrimeFaces Datatable - What is f:facet actually doing? -

-
looking through primefaces code in app noticed following line: <f:facet name="header">#{trainsearch.traincount} trains</f:facet> it looks overriding header, makes sense, can explain me in little more detail? what happening line of code? complete code listed below: <p:datatable id = "results" value = "#{trainsearch.trains}" var = "train" rendered="#{not empty trainsearch.trains}" styleclass = "train-search-table horizontal-border"> <f:facet name="header">#{trainsearch.traincount} trains</f:facet> <p:column headertext = "train id"> <p:panelgrid columns="1" styleclass = "train-id-grid" layout = "grid"> <h:outputtext styleclass = "train-id-label" value="#{train.traini}"/> <h:outputtex...
Read more

javascript - Error handling and status codes with knex in koa -

-
i'm experimenting koa , knex build restful web service, , while got basics working i'm stuck @ handling errors. i'm using koa-knex-middleware wraps knex in generator. i have following code defines happens , post requests particular resource: var koa = require('koa'); var koabody = require('koa-body')(); var router = require('koa-router')(); var app = koa(); var knex = require('./koa-knex'); app.use(knex({ client: 'sqlite3', connection: { filename: "./src/server/devdb.sqlite" } })); router .get('/equipment', function *(next){ this.body = yield this.knex('equipment'); }) .post('/equipment', koabody, function *(next){ this.body = yield this.knex('equipment').insert(this.request.body) }); app.use(router.routes()).use(router.allowedmethods()); app.listen(4000); this works in general, can't manage change http status codes. examp...
Read more