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PHPExcel has been unable to work properly for memory reasons at 40,000 and 100000 points, but it can be resolved by modifying the ini configuration, but the time may take longer to complete the work. xlswriter is a PHP C Extension that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file.
C library for reading/writing values from/to Excel .xlsx files.
Cross-platform C library for reading values from and writing values to .xlsx files.
XLSX I/O aims to provide a C library for reading and writing .xlsx files.
The .xlsx file format is the native format used by Microsoft(R) Excel(TM) since version 2007.
The library was written with the following goals in mind:
- primary focus on data values organized in tables, on not layout or graphics
- written in standard C, but allows being used by C++
- simple interface
- small footprint
- portable across different platforms (Windows, *nix)
- minimal dependancies: only depends on expat (only for reading) and libzip (which in turn depends on zlib)
- separate library for reading and writing .xlsx files
Also includes command line tools to convert between .xslx and CSV files.
http://www.filehelpers.net
The FileHelpers are an easy to use .NET library written in C#. Is designed to read/write data from flat files with fixed length or delimited records (CSV). Also has support to import/export data from different data storages (Excel, Access, SqlServer)
Code on GitHub: https://github.com/MarcosMeli/FileHelpers
dbf is an easy-to-use command line tool to show and convert the content of dBASE III, IV, and 5.0 files. It reads dBASE databases and prints the content to the screen or converts it to comma-separated (*.csv) files which can be opened in Excel, Calc.
Deploy in 115+ regions with the modern database for every enterprise.
MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
Technical analysis library with indicators like ADX, MACD, RSI, Stochastic, TRIX... includes also candlestick pattern recognition. Useful for trading application developpers using either Excel, .NET, Mono, Java, Perl or C/C++.
CppExcel is an unmanaged, stand-alone, platform-independent C++ library for reading and writing native Microsoft Excel 2007 XLSX and 97-2003 XLS files, without Excel needing to be installed. CppExcel is based on the PHPExcel library.
MS Excel, OOo Calc, Matlab steam and water properties based on IAPWS IF-97 Standard. Provide accurate steam and water properties such as enthalpy from 0-100 bar and 0-2000°C. The perfect tool both for replacing paper tables and for advanced calculations