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Tag Archives: Python
More Python Traps
I recently posted on some Python Traps, focussing on code where changes in the values of sub-routine arguments were not reflected in the calling routines. The reverse can also be a problem: if an array, a, is passed to a … Continue reading
Posted in Arrays, Excel, Link to Python, Newton, NumPy and SciPy, PyXLL, UDFs
Tagged Numpy, Passing variables, Python, python traps, PyXLL, UDF
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Microsoft Python Resources
In addition to the documentation of their software products, Microsoft now have a huge amount of on-line resources of more general content, including: YouTube: Python for Beginners Probably the largest hurdle when learning any new programming language is simply knowing … Continue reading
Posted in Computing - general, Excel, Link to Python
Tagged documentation, Microsoft, Python, YouTube
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Python Traps
When converting existing VBA code to Python there are a number of obvious changes to the syntax that need to be made for the code to run at all, but there are also a number of not so obvious traps … Continue reading
Posted in Arrays, Excel, Link to Python, Newton, NumPy and SciPy, PyXLL, UDFs, VBA
Tagged Excel, for loop counters |, Numpy, Passing variables, Python, python traps, PyXLL, UDF, VBA
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Multiple Integration with Scipy
Scipy has 3 functions for multiple numerical integration in the scipy.integrate module: dblquad: Compute a double integral. tplquad: Compute a triple integral’ nquad: Integration over multiple variables. I have written six functions to call these functions from Excel, via Pyxll: Each … Continue reading
Posted in Excel, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, PyXLL, UDFs
Tagged Excel, multiple integration, Python, PyXLL, SciPy, UDFs
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mpmath for Excel
mpmath has been mentioned in passing here before, but not in any detail. The mpmath site says: mpmath is a free (BSD licensed) Python library for real and complex floating-point arithmetic with arbitrary precision. It has been developed by Fredrik … Continue reading
Posted in Excel, Link to Python, Maths, PyXLL, UDFs, VBA, xlwings
Tagged evaluate pi, Excel, high precision maths, mpmath, Python, PyXLL, UDFs, VBA, xlwings
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Transferring large arrays with Pyxll
Pyxll is a commercial Excel add-in linking Excel and Python. The latest version offers greatly improved performance in transferring data between Excel and Python as Numpy arrays, amongst many other new features and improvements. To check what this means in practice, … Continue reading
Posted in Arrays, Excel, Frame Analysis, Link to Python, PyXLL, UDFs, VBA
Tagged data transfer time, Excel, large arrays, Python, PyXLL, UDFs, VBA
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More SciPy Solvers
The xlwings Scipy spreadsheet has been updated with a new example of the xl_SolveF function, that uses the Scipy Optimize root function. The new spreadsheet can be downloaded from: xlScipy3.zip The new example uses a python function ic_calc (included in the … Continue reading
Posted in Excel, Link to Python, Newton, NumPy and SciPy, UDFs, VBA, xlwings
Tagged bolt group, Excel, Python, SciPy, solvers, UDFs, VBA, xlwings
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