survey

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Is there an open source survey engine for java that will allow branching of questions? i.e. Question 1 has the options of A, B, or C and they each take you to a different set of follow-up questions. I've found a couple (JSurveyLib and Socrates QE), but those seem to be very tied to a GUI. The application that I

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . I've just bought a new 4GB USB thumb drive and I'm trying to decide what to put on it. I'm thinking about one of the webserver on a

问题 This question already has answers here : Extract year from date (6 answers) Closed 2 years ago . I've seen several entries here on a similar question yet on different platforms - i.e. not using R. My question, in brief, is: How do I take only the year info from a string variable that also contains the month and day of birth? Example: born_in 1 "1974-12-18" 2 ... Thank you in advance! 回答1: Here's a single line: format(as.Date("1974-12-18"),"%Y") 回答2: Maybe this will help: born_in <- "1974-12

问题 i want to implement a survey function in my app. There should be a 4 alternative answers and a diagramm which ilustrates the results. Has anyone an idea how i could do this? Maybe is there even a Library? I am thankful for every suggestion. Thanks for help 回答1: You could possibly use a Webview within your app and an existing survey service like Survey monkey. https://www.surveymonkey.com/mp/mobile-surveys/ In addition to this they also have a developer platform if you want to do more than the

问题 I am working on a survey created by PHP and MySQL. So the issue is, I am trying to create a ResponseID, which is an ID specific for every person submitting the survey. So the code was created to add 1 to the existing max value from the ResponseID column. Here's the code: //Response ID creation $query = "SELECT max(ResponseID) FROM survey"; $res = mysql_query($query); $RID = $res+1; I know I can condense it, but here's the problem: I already entered one item on the table with the ResponseID of

问题 I am working with survey data that use probability weights and multiple imputations. I would like to get marginal effects after estimating a logit model using the imputed data sets and the survey weights. I cannot figure out how to do this in R. Stata has the package mimrgns which makes it pretty easy. There is also this article (pdf) and supplementary material (pdf) that gives some direction, but I can't seem to apply it to my situation. In the following example, please assume I already

问题 Error in contrasts<- ( *tmp* , value = contr.funs[1 + isOF[nn]]) : contrasts can be applied only to factors with 2 or more levels I'm getting this error whenever I try using the svychisq function in the survey package. However the function works when I use the svytable function. The error talks about a factor with 2 or more level - the DIED variable is a factor with 2 levels, 0 and 1. > svytable(~COHORT+DIED, design=df_srvy) DIED COHORT 0 1 1997 26726.584 1647.118 2000 26958.912 1628.692 2003

问题 I have a survey database with one column for each question and one row for each person who responds. Each question is answered with a value from 1 to 3. Id Quality? Speed? -- ------- ----- 1 3 1 2 2 1 3 2 3 4 3 2 Now, I need to display the results as one row per question, with a column for each response number, and the value in each column being the number of responses that used that answer. Finally, I need to calculate the total score, which is the number of 1's plus two times the number of

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . So I have been struggling with finding a decent C# library to use with XMPP that supports either SSL or TSL encryption between the clients and the server. I am hoping that someone can recommend I library that meets some of my needs and is fairly well supported/documented. Also perhaps someone can confirm my

问题 I'm developing a simple survey module for an ASP application I'm working on and I'd like to get some suggestions on the data model. Questions can be one of three types - multiple choice, multiple answer; multiple choice, single answer, and free response. I'm thinking of the following tables: Question - with a question type discriminator ifeld PossibleAnswers- with a questionID and answer text field SurveyQuestionResponse- with a questionID, a clientID, and answer text Am I making this too