Stack Overflow
Stack Overflow

Questions tagged [data-management]

312 questions
0
votes
2 answers

UITableView setter method functions not being called

functions like this one: -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{ NSLog(@"called") return 1; } aren't being called, because the log doesn't appear at the console. I tried using [table realoadData] but it still…
raej99
  • 85
  • 5
0
votes
3 answers

best way to store data locally and update from web from time to time?

I have created an app which displays information in a organized manner about cultural places. The information is subject to changes, so I want it to be downloaded from the web. But not everytime. Only once in a while, because information doesn't…
Eric
  • 1
0
votes
1 answer

create sequence of numbers from time dependent panel data

so i have a data set where i have years students were in classes, and what quarter of the year they were in, so 2002 is 4 times and it has quarter 1,2,3,4, like…
JPK
  • 39
  • 6
0
votes
2 answers

Unsplitting a data frame by a variable (different length of factors)

I have a data frame (st1) that I split by a factor. I then performed functions to the split data (i.e. mean) by another factor and hence, I cannot perform unsplit any more because my original data frame is of different length now. As to walk you…
Kaye11
  • 359
  • 5
  • 17
0
votes
1 answer

Android - Writing string to file

I took this code from Android Developers page but the code won't work. I've looked around but nobody seems to give a clear answer. private void writetofile(String FILENAME, String content){ FileOutputStream outputStream; try { …
Hultan
  • 1,409
  • 1
  • 15
  • 28
0
votes
1 answer

R data.frame operation

I have a large dataset with ~1 mil rows and 8 cols (variables). One of those variables, ORDER, has categories from 1 to 90. I want to create a new data.frame with a reduced number of categories for the variable ORDER (4) 1, 2, 3+ and ALL, where ALL…
Ale
  • 303
  • 1
  • 9
0
votes
1 answer

Preserving data while expanding/merging Core Data models

Two separate but related questions regarding the use of Core Data: I add an entity/attribute/relationship to my Core Data model in Xcode. Is there a way to have it recognize the information in the existing storedata file and augment it, instead of…
Kaji
  • 2,220
  • 6
  • 30
  • 45
0
votes
1 answer

Assets Management in a clustered environment

I have a content management system running on a web server, that among others allows the user to upload assets like images, files, etc to the server. The problem i have is that there will be 2 servers running behind a load balancer and i am trying…
Andreas
  • 5,305
  • 4
  • 41
  • 60
0
votes
2 answers

Changing values of variables depending on a factor

I have a data set looking like this: Head structure(list(A = structure(c(1L, 1L, 1L, 1L, 1L, 1L), .Label = c("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24",…
Kaye11
  • 359
  • 5
  • 17
0
votes
2 answers

Panel data: How to specify a variable that refers to "number of years before and after change"?

This is how my time-series, cross-sectional data is structured: country year group change Afghanistan 1980 1 0 Afghanistan 1981 1 0 Afghanistan 1982 1 1 Afghanistan 1983 1 0 Afghanistan 1984 1 0…
TiF
  • 615
  • 2
  • 12
  • 24
0
votes
1 answer

ClassLoader - Loading and saving data

Hopefully someone can help me with this. It is my understanding that using a ClassLoader is the most reliable way to load in content. public class Pipeline{ public static URL getResource(String filename) { return…
LucidObscurity
  • 580
  • 7
  • 10
0
votes
3 answers

Remove lines based on missing information using sed

I have a data set that is sectioned very specifically, but rather inconveniently, like this: data <-…
mfk534
  • 719
  • 1
  • 9
  • 21
0
votes
1 answer

Use CMS for Relational Data management?

Should one use a CMS (Such as Joomla or Wordpress for example) to enable displaying, categorization, searches and manipulation of data etc.? I have ha need to create a solution for taking an excel sheet online with basic relations between data for…
djcj
  • 149
  • 2
  • 15
0
votes
2 answers

merge date vectors inside a data frame

I have a data structure df with some date vectors, one thou five, like this, df <- structure(list(one.date = c(NA, NA, NA, NA, NA, NA, NA, NA, NA, "2012-09-23", "2012-09-23", NA, NA, NA, NA, NA, NA, NA, NA, NA), two.date = c(NA, "2012-11-13", NA,…
Eric Fail
  • 8,191
  • 8
  • 72
  • 128
0
votes
1 answer

Macro variable in R

I have over 300 variables in my table. I want to choose only a handful of those variables to run through many procedures. Lm(), glm() etc..i have over 10 procedures that i need to run those variables everytime. Those handful of variables can change…
user16789
  • 183
  • 1
  • 1
  • 3
1 2 3
…
20 21