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[4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.
String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
Comma-separated values (CSV) is a text file format that uses commas to separate values, and newlines to separate records. A CSV file stores tabular data (numbers and text) in plain text, where each line of the file typically represents one data record.
A California-based tire company has recalled over 540,000 replacement tires mistakenly labeled as snow traction products, according to an announcement from the National Highway Traffic Safety ...
Nearly a dozen Illinois teenagers were slapped with felony charges after they allegedly used dating apps to lure and beat two adult men over the summer — reportedly as part of a social media ...
Don Johnson is basking in all the family love. The "Miami Vice" star celebrated his 75th birthday with his children, including Dakota Johnson.
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]
From March 2011 to December 2012, if you bought shares in companies when T. Gary Rogers joined the board, and sold them when he left, you would have a -20.2 percent return on your investment, compared to a 11.3 percent return from the S&P 500.