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Category Archives: VBA
Passing variable argument lists from Excel to Python via xlwings
When calling a Python function it is sometimes necessary to pass a variable number of arguments. Examples from the xlw_Scipy spreadsheet include: Curve fitting functions, for which the functions to be fitted may have any number of arguments. The Scipy … Continue reading
Posted in Arrays, Excel, Link to Python, NumPy and SciPy, UDFs, VBA, xlwings
Tagged dictionaries, Excel, ParamArray, Passing arrays, Passing named arguments, Python, UDFs, VBA, xlwings
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Returning Arrays From VBA and Python
Most of the user defined functions (UDFs) presented on this blog return a multi-cell array, that must be entered by selecting the output range then pressing Ctrl-shift-enter to display all the results. This process has several inconveniencies: You need to know … Continue reading
Posted in Arrays, Excel, Link to Python, UDFs, VBA, xlwings
Tagged dynamic arrays, Excel, Python, resizing array functions, UDFs, using array functions, VBA, xlwings
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More Numpy with Excel and xlwings
The spreadsheet presented in the last post on sorting also includes links to many other Numpy functions. The spreadsheet and associated Python file can be downloaded from: xlNumpy.zip The Numpy functions require xlwings and Numpy to be installed, which are included in … Continue reading
Posted in Arrays, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings
Tagged Anaconda, Excel, math functions, Numerical ranges, Numpy, Polynomial functions, Python, Trig functions, UDF, VBA, xlwings
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Sorting with Python and Numpy
Following the previous post, lets look at sorting functions in the Numpy library. The spreadsheet xlwNumpy links to a variety of Numpy functions, including the sorting functions described below. The spreadsheet and associated Python code can be downloaded from: xlNumpy.zip … Continue reading
Sorting with VBA and Python
This subject was last covered in March 2014. I have now updated the Python code to work with xlwings, and the new version (including open source VBA and Python code) can be downloaded from: Sortfunc.zip. The previous version, linking to … Continue reading
IP2_py Update for Python3
The spreadsheet IP2_py provides a large number of geometric functions, including intersection points of lines, circles and planes, interpolation, rotations, and converting between coordinate systems. Many of the functions are available in VBA and Python versions. The Python code has now … Continue reading
Beam geometric non-linear effects
A quick and convenient way to allow for the effect of deformations on the behaviour of beams and columns under axial load is to adjust the beam stiffness matrix, so that the calculated deflections are in equilibrium with the applied … Continue reading
Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, UDFs, VBA
Tagged Euler buckling, Excel, Frame Analysis, Non-linear geometry, Second order effects, UDF, VBA
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