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Category Archives: Arrays
More iterative solvers
Following the recent post on using Brent’s Method solvers on an array (Iterative solvers and arrays), here is another example with an engineering related problem. The example is included in the xlScipy3 spreadsheet, which can be downloaded from: xlScipy3.zip The depth … Continue reading
Posted in Arrays, Beam Bending, Concrete, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings
Tagged Brents method, depth of neutral axis, Excel, Python, Reinforced Concrete, SciPy, UDFs, VBA, xlwings
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Iterative solvers and arrays
A recent thread at Eng-Tips was looking for a solution to the problem described below: The solutions to this problem described below can be downloaded from: ItSolve.zip and xlScipy3.zip The ItSolve.xlsb spreadsheet contains a user defined function (UDF) to solve iterative … Continue reading
Posted in Arrays, Charts, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings
Tagged Brents method, Excel, Python, SciPy, UDFs, VBA, xlwings, xlwSciPy3
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Using VBA Evaluate as an Array Function
I recently discovered from a thread at Chandoo’s Excel Forum that the VBA Evaluate function can be used as an array function. As a simple example: Range(“A11:A16”).Value = Evaluate(“= B11:B16 + C11:C16”) will add the values in columns B and C, … Continue reading
Posted in Arrays, Coordinate Geometry, Excel, Maths, UDFs, VBA
Tagged array functions, Evaluate, Excel, UDFs, VBA
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VBA vs Power Query vs Python
A recent post at Chandoo’s Excel Forum asked for a formula to extract all pairs of digits from a number with 4 digits. This was soon extended to dealing with longer numbers, and the examples looked at here will work with … Continue reading
Posted in Arrays, Excel, Link to Python, UDFs, VBA, xlwings
Tagged Chandoo, Excel, itertools, Power Query, Python, UDF, VBA, xlwings
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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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