# All Questions

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### Taking the third derivative of: $f = (ln (x) + e^{4 (x - 1)})^{15}$? [closed]

I am VERY new to Mathematica and struggle to solve this question: Let $f = (ln (x) + e^{4 (x - 1)})^{15}$ and calculate what value $f^{(3)}(1)$ have. How would you go about to solve this in ...
125 views

### How can I pick a color from a ColorMap and colorize selected image pixels with this color

I have a binarized image and would like to set pixel values which are 1 to a certain (any) color picked from ColorData["TemperatureMap"] and 0 to another color of TemperatureMap. How can I do that? ...
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### Request for Explanation in case of Replacement not working

The 2 code snippets work on a matrix ABg with 22 rows and two columns containing Strings. Some entries in column 2 are List { } to be recognized by the first Character "{". In the list some items must ...
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### Copula - Correlation or Covariance

Can someone explain to me why the CopulaDistribution function with a "Multinormal" kernal asks for the covariance matrix instead of the correlation matrix. Just by looking at the formula for copula, ...
65 views

### Infinite sums with Boole and EvenQ

Suppose I am interested in a sum across a set of even numbers, such as: Sum[x, {x, 2, 20, 2}] 110 or ...
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### Graphing all connected, planar, and vertex transitive graphs with vertices <=10 and edges <=15

I just started using Mathematica, how would I graph all possible connected, planar, and vertex transitive graphs with vertices <=10 and edges <=15
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### Rescale::nargs: error, what can be the cause [closed]

I was trying the code given in the answer to this question What are the possible ways of visualizing a 4D function in Mathematica? but in V 10.01, on windows, it now gives an error ...
77 views

### Mathematica displays the unevaluated expression Expectation function

The evaluation runs for a few seconds and then Mathematica displays the unevaluated expression Expectation function ...
90 views

### Projection of ListPointPlot3D on 2 axes

I am just starting to learn Mathematica and I was trying to get projection of the list of points in ListPointPlot3D. I read about ViewPoint option. It shows the axes I need but doesn't show the points ...
44 views

### converting miles into inches from wolframalpha

I was creating a simple quiz. I noticed that wolframalpha converts 0.25 miles into 15800 inches while google converts it into 15840 inches. Is it a bug or did I make some miscalculation?
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### Simple optimization 3D plot

Because this is such a simple example I am not going to explain the calculations. I am strictly wondering why I do get errors when plotting it. ...
53 views

### How to get the content size (in pixels) of the output in an output cell?

How to get the content size (in pixels, width and height) of the output in an output cell?
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### Find maximum number of instances with FindInstance[]

I understand that ...
87 views

### Unexpected result from StringReplace

The following works as expected. StringReplace["xxxyxz", "x" ~~ _ -> "ww"] "wwwwww" And so does this. ...
29 views

### Picard iteration method by yn(t) [on hold]

I am really bad with Mathematica, but I have an assignment due in my Real Analysis class that requires it. Here is the question: Denote successive approximations via the Picard iteration method ...
40 views

### Creating a List with Lists as entries [closed]

I'm trying to create a list A which contains 8 same elements. Each of the elements look like {0, 0, 0, 0}. I was able to do it ...
59 views

### Defining a function using a preceding expression

How can I automatically define a function inside my Mathematica code using a result (expression) that preceded the point of definition. For example: ...
46 views

### While subpartitioning the elements in list using GatherBy, can I corresponding subpartition the elements of an unrelated list?

If we have a list like the following: list1 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}; And we use GatherBy to subpartition is according to a test function ...