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David Keith
Discussions
In converting an Annuity to a Cashflow, I believe the initial payment is being handled incorrectly. Here is code that demonstrates that: (* Annuity with an initial payment and then 5 payments *) (* Present value *) ...
I was looking at the new plotting functions in Version 12.2 and tried them out on a comparison of the dimensions and weight of various cameras. PlotLegends behaves as expected with RadialAxisPlot but not with ParallelAxisPlot. Does anyone have any...
I see many posts on this forum which seem to be very readable posts of an entire notebook. [This excellent post][1] is a good example. I have been posting by entering code a piece at a time, interleaved with commentary. How are these whole...
The following code asks to display the number 1.23001 with 4 digits precision: ScientificForm[1.23001, 4] (* "1.23" *) In my opinion, it is displayed with 3 digits precision. I would prefer it display 1.230 to make the precision...
A code for data analysis in use in version 12.0 throws errors in version 12.1. I tracked the issue to version 12.1 generating graphics which appear to have an incorrect dimension . Below are two code segments with the same code executed in the two...
# Introduction This Mathematica code determines the component values for a low-pass active filter implemented using the Sallen-Key architecture. The filter will be a second order Chebyshev filter of type 1. This filter offers a steep cut off at the...
The documentation for BodePlot lists FeedbackType as an option. It states that for BodePlot[lsys], lsys is wrapped in a feedback loop before plotting, with the default being negative feedback. When I read this I was horrified -- Why would I want...
This post is a summary of a problem identified in a longer post on Mathematica StackExchange which can be found [here][1]. The issue identified is inaccurate numerical simulation provided by the function OutputResponse applied to a...
It looks useful, but . . . . Plot the Arg of a complex expression: tf = 1000/(s + 1000); Plot[Arg[tf /. s -> w I], {w, 10, 100000}, PlotRange -> All, ScalingFunctions -> {"Log", "Linear"}] ![enter image description here][1] ...
I have been using Mathematica 11.3 to analyze experimental data in the form of FITS format images. In 11.3, Import[filename] evauated to an image. In 12.0, it seems to evaluate to an association: ![enter image description here][1] So this has...