merge

问题 I have mydf1 <- data.frame(ID = c(1,2,3,4,5), color = c("red", NA, NA, NA, "green"), name = c("tom", "dick", "harry", "steve", "mike")) mydf2 <- data.frame(ID = c(1,2,99), color = c("red", "orange", "yellow"), name = c("tom", "dick", "Aaron")) I would like to update mydf1$color with the corresponding color from mydf2 for any rows that match on both ID and name. The desired output would be to update the color in row 2 to orange and leave the rest as is: ID color name 1 1 red tom 2 2 orange

问题 How can I find out if there were conflicts when merging a branch and what shenanigans did the person have to do to resolve those conflicts? git log -p seems to show empty diffs for all merge commits, regardless whether they have manual changes or not. 回答1: git show produces a combined diff for a merge commit by default, which will contain only the lines that changed as part of the conflict resolution. git show <merge_commit_sha1> git log takes the --cc option to produce combined diffs for

问题 How can I find out if there were conflicts when merging a branch and what shenanigans did the person have to do to resolve those conflicts? git log -p seems to show empty diffs for all merge commits, regardless whether they have manual changes or not. 回答1: git show produces a combined diff for a merge commit by default, which will contain only the lines that changed as part of the conflict resolution. git show <merge_commit_sha1> git log takes the --cc option to produce combined diffs for

问题 This question already has answers here : Pandas left join on duplicate keys but without increasing the number of columns (2 answers) Closed last year . I'd like to combine two dataframes using their similar column 'A': >>> df1 A B 0 I 1 1 I 2 2 II 3 >>> df2 A C 0 I 4 1 II 5 2 III 6 To do so I tried using: merged = pd.merge(df1, df2, on='A', how='outer') Which returned: >>> merged A B C 0 I 1.0 4 1 I 2.0 4 2 II 3.0 5 3 III NaN 6 However, since df2 only contained one value for A == 'I', I do

问题 This question already has answers here : Pandas left join on duplicate keys but without increasing the number of columns (2 answers) Closed last year . I'd like to combine two dataframes using their similar column 'A': >>> df1 A B 0 I 1 1 I 2 2 II 3 >>> df2 A C 0 I 4 1 II 5 2 III 6 To do so I tried using: merged = pd.merge(df1, df2, on='A', how='outer') Which returned: >>> merged A B C 0 I 1.0 4 1 I 2.0 4 2 II 3.0 5 3 III NaN 6 However, since df2 only contained one value for A == 'I', I do

问题 This question already has answers here : How to import multiple .csv files at once? (13 answers) How can I read multiple (excel) files into R? [duplicate] (1 answer) Closed last year . I am trying to merge a list of .xls files in google drive. I have now managed to create a list of all the files I need, but for some reason I still can't manage to merge them, this is the code I have so far: library(googledrive) inputfiles <- drive_ls(path = "Email It In", pattern = "*PDOL_dataexport", n_max =

问题 The result of merge.zoo does not have the same time zone as its input. Consider the following example library(zoo) zoo_a=zoo(data.frame(a=1:5), seq(as.POSIXct("2014-01-01 00:00:01",tz="UTC"), as.POSIXct("2014-01-01 00:00:05",tz="UTC"), by=1) ) zoo_b=zoo(data.frame(a=1:4), seq(as.POSIXct("2014-01-01 00:00:01",tz="UTC"), as.POSIXct("2014-01-01 00:00:05",tz="UTC"), by=1) ) zoo_merged=merge(zoo_a,zoo_b) time(zoo_merged)[1] #2013-12-31 19:00:01 EST time(zoo_a)[1] #2014-01-01 00:00:01 UTC time(zoo

问题 I'd like to know how to merge two (or more) PDF files into one single file using jsPDF and then show it using the browser's pdf viewer of the user. My requirement is to make easier the process of printing a group of documents, instead of printing one by one just merge them all and print one single file . I've looked at this other question here in Stack Overflow but that didn't help me too much because in this case they are creating the pdf from HTML content, and in my case i have to merge a

问题 I'd like to know how to merge two (or more) PDF files into one single file using jsPDF and then show it using the browser's pdf viewer of the user. My requirement is to make easier the process of printing a group of documents, instead of printing one by one just merge them all and print one single file . I've looked at this other question here in Stack Overflow but that didn't help me too much because in this case they are creating the pdf from HTML content, and in my case i have to merge a

问题 I'd like to know how to merge two (or more) PDF files into one single file using jsPDF and then show it using the browser's pdf viewer of the user. My requirement is to make easier the process of printing a group of documents, instead of printing one by one just merge them all and print one single file . I've looked at this other question here in Stack Overflow but that didn't help me too much because in this case they are creating the pdf from HTML content, and in my case i have to merge a