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Changing column names of a data frame
I have a data frame called "newprice" (see below) and I want to change the column names in my program in R.
16 Answers
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Deleting all files from a folder using PHP?
For example I had a folder called `Temp' and I wanted to delete or flush all files from this folder using PHP. Could I do this?
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Apache POI Excel - how to configure columns to be expanded?
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After you have added all your data to the sheet, you can call autoSizeColumn(int column) on your sheet to autofit the columns to the proper size
Here is a link to the API.
See this post for more reference
Problem in fitting the excel cell size to the size of the content when usin...
Getting the folder name from a path
...olderName = Path.GetFileName( Path.GetDirectoryName( path ) );
The inner call to GetDirectoryName will return the full path, while the outer call to GetFileName() will return the last path component - which will be the folder name.
This approach works whether or not the path actually exists. This...
How do I redirect with JavaScript? [duplicate]
... might not always be the best option. If one is redirecting after an AJAX call completes or something, keeping the originating page in history might be expected. It really depends on the situation!
– dlkulp
Jan 21 '19 at 20:07
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Why am I getting a NoClassDefFoundError in Java?
...ting a NoClassDefFoundError when I run my Java application. What is typically the cause of this?
27 Answers
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Convert object to JSON in Android
Is there a simple method to convert any object to JSON in Android?
6 Answers
6
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How can I grep for a string that begins with a dash/hyphen?
...s to create a .sh script that just echos all the arguments. I use a script called echo-args.sh to play with from time to time, all it contains is:
echo $*
I invoke it as:
bash echo-args.sh \-X
bash echo-args.sh \\-X
bash echo-args.sh "\-X"
You get the idea.
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What is Unicode, UTF-8, UTF-16?
...s is needed. Thus came Unicode. It assigns every character a unique number called a code point. One advantage of Unicode over other possible sets is that the first 256 code points are identical to ISO-8859-1, and hence also ASCII. In addition, the vast majority of commonly used characters are repres...
SQLite Reset Primary Key Field
..._table';
SQLite Autoincrement
SQLite keeps track of the largest
ROWID that a table has ever held using
the special SQLITE_SEQUENCE table. The
SQLITE_SEQUENCE table is created and
initialized automatically whenever a
normal table that contains an
AUTOINCREMENT column is created. The...