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Mathematica : Recent Questions and Answers (Page 208)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

Converting Dynamic Variable to String for use in an API

I am trying to create a code that concatenates a series of dynamic selections (year, month, day) to a string for creating a dynamic date string for use in an...

Asked on 12/22/2020

1 answer

Fitting a two-dimensional Gaussian to the image

I have a image which I want to fit 2d Gaussian function with that. I used the below...

Asked on 12/22/2020 by mrnr

1 answer

Find values of n for which expression is integer

I have an expression for which I want ot find values of n that will make it an integer. Here is the expression:(n^(3/2) - n)^(1/3)orn^(1/2) - n^(1/3)I want to...

Asked on 12/22/2020 by Real Noob

1 answer

How to remove Null plot markers in QuantilePlot?

Bug introduced in 12.0 and persisting in 12.1.1 I want to change the plot markers of the data points in QuantilePlot. This seems pretty straightforward:QuantilePlot[ ...

Asked on 12/22/2020

1 answer

Please help me with using ListDensityPlot

I have a data file consisting of radial, angle, and intensity columns. For each radius value, angle moves a full rotation while collecting intensity. With ListDensityPlot, I could plot it...

Asked on 12/22/2020 by Malli Tangi

3 answer

Plot of the derivative of a function

I have a function functionSL as a function of t (t<0) where I want to find the extremum of the function and also find at which t it occurs. I...

Asked on 12/22/2020

2 answer

Is MathieuC for moderately large imaginary arguments broken?

Bug introduced in 3.0 and persisting through 12.0(reported as CASE:3208982)I'm trying to plot MathieuC[-3,0.3,I x] for $xin[0,10]$, and here's what I get even with arbitrary precision arithmetic (here...

Asked on 12/22/2020

1 answer

Vector entry matching problem

I have a list composed by vectors. Let's say with five entries in each one. The list can have any dimension.file = {{1, 0, -1, 1,...

Asked on 12/22/2020

2 answer

how can draw a scatter plot with a regression line across regions using Manipulate[...]

I have the following code:ClearAll[regions, country, plf, PoU];regions = {"Africa", "Africa", "Africa", "Africa", "Africa", "Africa","Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Africa", "Arab", "Arab", "Arab", "Arab",...

Asked on 12/22/2020

1 answer

Text to speech in notebooks?

Mac OS, MMA 10 -- I accidentally discovered that typing CtrlV between cells reads out the cell below, or, if you have text selected, reads out the text. CtrlV...

Asked on 12/22/2020 by Reb.Cabin

2 answer

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