# All Questions

8 views

### How can I write the coding in mathematica based on time?

Hi, I need some help for my problems. May anyone help me in coding I want to make For loop based on time for this matrix. I want to change to look the changes of alpha3 when increasing of time with ...
7 views

### How do I prevent Root and RootSum from expanding over quadratic roots?

For quadratics, RootSum[a #^2 + b # + c &, Cos[#] &] Immediately turns into and also, ...
19 views

### How to replace Real part o f a complex number

I want to replace the real part of a list of complex numbers by zero. I try these two solutions but it does not works ...
23 views

### Image Filtering in the frequency domain

Here is a good starting to fiter image in the frequency domain lena = ColorSeparate[ImageResize[ExampleData[{"TestImage", "Lena"}],{121,121}]][[1]]; (Create a ...
22 views

### Contour plot with a condition

I have a simple contour plot and wanted to find solutions only when both x and y are integers. The following code doesn't seem to work. ...
12 views

### Get asymptotic expression of Legendre function

How to get this asymptotic expression of the first element of the list by Mathematica with small x and very large n? ...
14 views

### Time series decomposition using wavelet transform

I have a monthly time series data. I want to perform a non-decimated discrete wavelet transform to decompose the time series into its different time scale components (level 6). Is there a way of doing ...
15 views

### build absolute value equations know solution [migrated]

We have absolute value equations with unknown coefficients: |x + a| = b and we know solutions: x = 11 and x = 5 We need ...
19 views

### A function that takes in an array and returns an array (or lists)

So I have function f[x_] := c.x - Total[Log[b - A.x]] where the variables have dimension c is 1x100, b is 500x1, A is 500x100, and x is 100x1. My goal is to get the ...
14 views

### Graph coloring - edges - algorithm tweak

I was kind of heedless and read wrong assignment task. I wrote an algorithm that finds the minimum numbers of colors in graph for vertices. And when I finished it, not i read the assignment task ...
13 views

### Preventing LocatorPane locator from moving when plot range changes

I have a LocatorPane within a Manipulate such that the range of the plot behind the locator can vary. When it does, this ...
20 views

### Getting Random Integers from the set {-1,1} quickly [on hold]

I was wondering if in Mathematica there is a quick way to get a random integer from the set {-1,1} with equal probability (i.e. getting -1 or 1 with equal probability). Usually I deal with Normal ...
21 views

### How to Operate on a Dynamic Dataset?

I cannot operate on the Dataset I am dynamically filtering. Minimal example follows. ...
26 views

### Struggling to Apply “Differences” [duplicate]

It looks like the following code should work, and allow it spits out error messages saying I have too many arguments, the code spit out after the error message looks like exactly what I want to ...
30 views

### Changing style of label boxes in TimelinePlot

When I export the below TimelinePlot to an .eps figure (to include in a document), the boundaries of the rounded boxes surrounding the label text do not appear. ...