# All Questions

168 views

### Select a certain row among the duplicates

I have the following problem: I have a (a lot)*3 table, meaning that I have 3 columns, say X, Y and Z, with real values. In this table some of the rows have the same (X,Y) values, but with different ...
110 views

### Laplace equation

I tried to run this code, but it doesn't work for NDSolve ...
130 views

### FindMinimum function does not produce minimum from near point

Using my simple program and I would like to find such matrix elements that minimize difference of their eigenvalues. ...
79 views

### How to extract info from Association? [duplicate]

How can one extract a list of keys and a list of values from the association? e.g. as = <|a->1, b->2, c->3, d->4|> ...
306 views

### How do I produce a BarLegend with the default coloring of a ContourPlot, using Legended?

I have a series of ContourPlots that I want to compare in a GraphicsRow environment. I want to add a single Legend for all three plots. Also, I really like the standard color scheme of the ...
42 views

### How does LinearModelFit handle cases where the design matrix rank is lower than the model terms?

So, I understand what this error means: ...
101 views

### Using indexed array elements as integration dummy variables with EvaluationMonitor. Bug?

As part of a routine that must cope with integration of varying numbers of dimensions, I would like to use indexed variable names (e.g., x[0], x[1],...) as dummy integration variables. However, it ...
135 views

### Is It Safe to Remove the Documentation Notebooks?

I am running Mathematica 10 on linux and noted that the directories containing Mathematica's documentation come to over 3GB. Am I safe to delete these directories without affecting how Mathematica ...
140 views

### How to label only leaves in TreeForm?

I have a Huffman encoding represented as a list in the following manner: encoding = {{{w, d}, {o, s}}, {{{e, q}, a}, {i, j}}}; This means that ...
236 views

### How to solve for “k”

So the question is given that the atmospheric pressure is modelled by the differential equation p'[h]=-kp[h], p[0]=1013, p[20]=50. find k and comstant of integration. My code was: ...
67 views

### Do Dataset functions get applied to rows in order?

If I have a dataset ds and perform an operation such as ds[All, f] does f get applied in the order the rows exist (the order they were placed into the dataset or as the result of a SortBy clause) or ...
55 views