difference

r compare column types between two dataframes

由 假如想象 提交于 2019-12-08 06:03:52
问题 This may be a bad question because I am not posting any reproducible example. My main goal is to identify columns that are of different types between two dataframe that have the same column names. For example df1 Id Col1 Col2 Col3 Numeric Factor Integer Date df2 Id Col1 Col2 Col3 Numeric Numeric Integer Date Here both the dataframes (df1, df2) have same column names but the Col1 type is different and I am interested in identifying such columns. Expected output. Col1 Factor Numeric Any

How to tell if a value changed over dimension(s) in Pandas

由 时间秒杀一切 提交于 2019-12-08 05:13:41
问题 Let's say that I have some customer data over some dates and I want to see if for example their address has changed. Over those dates. Ideally, i'd like to copy the two columns where the changes occurred into a new table or just get a metric for the amount of total changes. So, if I had a table like Date , Customer , Address 12/31/14, Cust1, 12 Rocky Hill Rd 12/31/15, Cust1, 12 Rocky Hill Rd 12/31/16, Cust1, 14 Rocky Hill Rd 12/31/14, Cust2, 12 Testing Rd 12/31/15, Cust2, 12 Testing Ln 12/31

R rollapply bottom to top?

由 大憨熊 提交于 2019-12-07 19:01:32
问题 I'm trying to run rollapply from the bottom of my data.frame up to the top of my data.frame. Basically the last row in the data.frame (RBH) is the final measurement for a given subject in 2012. I then need to subtract each annual measurement in the previous years to calculate what the individual's size would have been each year prior. Sample data.frame: df1 <- structure(c(1.62, 3.96, 4.89, 6.61, 8.79, 57.15, 2.43, 5.58, 7.2, 9.3, 11.87, 66.6, 1.47, 3.49, 4.32, NA, NA, 60.75), .Dim = c(6L, 3L)

What's the difference between a function and a functor in Haskell? Only definition?

由 房东的猫 提交于 2019-12-07 16:48:04
问题 In Haskell, when writing a function, it means we map something(input) to another thing(output). I tried LYAH to understand the definition of Functor: seems just the same like a normal Functor. Is there any restriction that a function could be called a Functor? Is Functor allowed to have I/O or any other side effect? If in Haskell, "everthing is a function", then what's the point of introducing the "Functor" concept? A restricted version of function, or an enhancement version of a function?

What is the Difference between CMMI and Agile? [closed]

由 ⅰ亾dé卋堺 提交于 2019-12-07 03:04:08
问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . Is there anyone who can tell me what is the difference between CMMI and Agile. I know some obvious difference, but I want to know it further. I will appreciate it a lot if someone can help me! Thanks! 回答1: CMMI is a process improvement methodology which aims to take projects or

Finding difference between strings in Javascript

由 走远了吗. 提交于 2019-12-06 19:53:34
问题 I'd like to compare two strings (a before and after) and detect exactly where and what changed between them. For any change, I want to know: Starting position of the change (inclusive, starting at 0) Ending position of the change (inclusive, starting at 0) relative to the previous text The "change" Assume that strings will change in only one place at a time (for example, never " B il l " -> " K il n "). Additionally, I need the start and end positions to reflect the type of change: If

R rollapply bottom to top?

由 烈酒焚心 提交于 2019-12-06 10:35:53
I'm trying to run rollapply from the bottom of my data.frame up to the top of my data.frame. Basically the last row in the data.frame (RBH) is the final measurement for a given subject in 2012. I then need to subtract each annual measurement in the previous years to calculate what the individual's size would have been each year prior. Sample data.frame: df1 <- structure(c(1.62, 3.96, 4.89, 6.61, 8.79, 57.15, 2.43, 5.58, 7.2, 9.3, 11.87, 66.6, 1.47, 3.49, 4.32, NA, NA, 60.75), .Dim = c(6L, 3L), .Dimnames = list(c("2008", "2009", "2010","2011", "2012","RBH"), c("Tree001", "Tree002", "Tree003")))

Difference between couchbase and couchbase lite? [Previously called as touchDB]

由 陌路散爱 提交于 2019-12-06 07:56:54
问题 What is Couchbase and what is Couchbase Lite? Is there any difference between the two? How could I create couchbase lite in mobile and how could i communicate to a server? 回答1: Do you happen to know about CouchDB? I don't know how far apart couchdb and couchbase are at the moment but I think very far. What I've understood so far is, Couchbase, Inc took the couchdb code and decided that they wanted to focus on speed. One of the most difficult parts (speed wise) of couchdb is the

What is difference index.html vs index.jsp? [closed]

由 北慕城南 提交于 2019-12-06 05:06:59
Closed . This question needs to be more focused . It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post . Closed 5 years ago . One URL ends in 'index.html'. Another URL ends in 'index.jsp'. Explain how these two requests result in very different behavior by the server. JSP is a file extension for Java Server Pages file format. A JSP is an HTML page containing a reference to Java servlets, or, java server side applets. JSP files help to deliver server side customized content on a webpage through servlets.

What's the difference between a function and a functor in Haskell? Only definition?

由 ╄→гoц情女王★ 提交于 2019-12-06 02:12:24
In Haskell, when writing a function, it means we map something(input) to another thing(output). I tried LYAH to understand the definition of Functor: seems just the same like a normal Functor. Is there any restriction that a function could be called a Functor? Is Functor allowed to have I/O or any other side effect? If in Haskell, "everthing is a function", then what's the point of introducing the "Functor" concept? A restricted version of function, or an enhancement version of a function? Very confused, need your advice. Thanks. It helps to know a little category theory. A category is just a
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