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Replace a value in a data frame based on a conditional (`if`) statement
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Easier to convert nm to characters and then make the change:
junk$nm <- as.character(junk$nm)
junk$nm[junk$nm == "B"] <- "b"
EDIT: And if indeed you need to maintain nm as factors, add this in the end:
junk$nm <- as.factor(junk$nm)
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psql: FATAL: role “postgres” does not exist
...ep is to check the missing role: What is the output within psql of the command \du ? On my Ubuntu system the relevant line looks like this:
List of roles
Role name | Attributes | Member of
-----------+-----------------------------------+-------...
Your project contains error(s), please fix it before running it
I am developing a simple Android application. But when I run Eclipse, it shows the following error:
26 Answers
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Any tools to generate an XSD schema from an XML instance document? [closed]
I am looking for a tool which will take an XML instance document and output a corresponding XSD schema.
10 Answers
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How to make a smaller RatingBar?
...lt RatingBar widget is sorta' lame.
The source makes reference to style "?android:attr/ratingBarStyleIndicator" in addition to the "?android:attr/ratingBarStyleSmall" that you're already familiar with. ratingBarStyleIndicator is slightly smaller but it's still pretty ugly and the comments note tha...
Spring Boot - Cannot determine embedded database driver class for database type NONE
... properties that you can set.
You'll need to provide the appropriate url and driver class name:
spring.datasource.url = …
spring.datasource.driver-class-name = …
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SQL Server Installation - What is the Installation Media Folder?
...8. I have installed .NET framework 3.5.
Then I got folder SQL Server 2008 and performed following steps-
10 Answers
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Import SQL file into mysql
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In Chrome they are called bookmarks, and you can just click the star in address bar ;)
– Andrew
Dec 29 '13 at 0:17
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Search for all occurrences of a string in a mysql database [duplicate]
...locate all occurrences of a url in a database. I want to search all tables and all fields. But I have no idea where to start or if it's even possible.
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“No such file or directory” error when executing a binary
...ed it: sudo apt-get install ia32-libs
– RyanfaeScotland
Oct 11 '13 at 12:44
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If anyone still g...