r - comparing values in a row -

-

i trying compare values on data frame rows, , removing ones match, this

dat[!dat[1]==dat[2]]

where

> dat

returns

n1  n2 n1  n4 n4  n5 n1  n3 n4  n4

so want compare values , delete last row, since both columns have same data. when use above code, tells me 

error in ops.factor(left, right) : level sets of factors different

the str(dat) reads

'data.frame':   5 obs. of  2 variables: $ v1: factor w/ 2 levels "n1","n4": 1 1 2 1 2 $ v2: factor w/ 4 levels "n2","n3","n4",..: 1 3 4 2 3

i suspect in creation of data, inadvertently , implicitly converted columns factors. possibly happened when read data source, e.g. when using read.csv or read.table. example illustrates it:

dat <- read.table(text=" n1  n2 n1  n4 n4  n5 n1  n3 n4  n4")  str(dat) 'data.frame':   5 obs. of  2 variables:  $ v1: factor w/ 2 levels "n1","n4": 1 1 2 1 2  $ v2: factor w/ 4 levels "n2","n3","n4",..: 1 3 4 2 3

the remedy pass argument stringsasfactors=false read.table():

dat <- read.table(text=" n1  n2 n1  n4 n4  n5 n1  n3 n4  n4", stringsasfactors=false)  str(dat) 'data.frame':   5 obs. of  2 variables:  $ v1: chr  "n1" "n1" "n4" "n1" ...  $ v2: chr  "n2" "n4" "n5" "n3" ...

then code works (except suspect you've missed comma):

dat[!dat[1]==dat[2], ]   v1 v2 1 n1 n2 2 n1 n4 3 n4 n5 4 n1 n3

Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more