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Category Archives: Python
Python in Excel: Python User Defined Functions
This post explores using Python in Excel to create Python User Defined Functions. The example used is a function to calculate Gini coefficients (see https://fastexcel.wordpress.com/2011/05/21/fast-gini/). Defining the UDF Python UDFs live in the workbook global Python space and must be … Continue reading
Posted in Calculation, Excel, Python, UDF
Tagged calculation speed, Excel, Python, UDF
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Python in Excel: Controlling Python Calculation
Because Python calculations can be slow it is worth looking at ways of controlling Python calculation. Partial Calculation The calculation setting that used to be called “Automatic except Data Tables” has been renamed to “Partial”. Partial Calculation works like Automatic … Continue reading
Posted in Calculation, Excel, Python, VBA
Tagged calculation methods, calculation speed, Excel, Python
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Python in Excel: How do Excel and Python Formulas Work Together?
In the previous post I showed how Python and Excel calculation methods are completely different: So when Excel formulas and Python formulas depend on one another how does this all work? Excel->Python->Excel->Python Lets look at a simple example of inter-dependent … Continue reading
Python in Excel: PY Calculation, Globals & Co-Volatility
Python Calculation Python in Excel calculates all the PY cells in a workbook sheet by sheet, and row by row, starting at the top left PY cell. If you break this calculation sequence rule, by for instance moving cell E5 … Continue reading
Python in Excel: Round-Tripping Gotchas
Python is a full-blown programming language and so supports a rich variety of datatypes.So what happens when you move data from Excel to Python and back to Excel (Round-Trip)? Excel Datatypes It is important to distinguish between formatted Excel values … Continue reading