Questions tagged [data-structures]
Questions on using or implementing more or less common data structures such as linked lists, structs, trees, tries, heaps etc. in Mathematica.
203 questions
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Searchable non-atomic Associations
I really like Associations in most regards. But they can be really annoying to work with when you need to search, or act on, their value contents. I understand why ...
- 4,931
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Appending to ByteArray [closed]
I am reading data from a socket using SocketReadMessage. It gives a ByteArray. The data comes in chunks, and I need to combine ...
- 111
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244
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How to return data only from a memoized, cached variable
I created a simple test to explore memoization/caching:
...
- 315
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2
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110
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How to efficiently merge nested lists into a structure with columns grouped by sublists in Mathematica?
I am working on a problem involving nested lists of varying lengths and structures in Mathematica. The goal is to merge these lists into a single unified structure, where each sublist contributes a ...
- 366
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101
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Adding a column to a dataset doesn't work when function has a warning
I have the following dataset:
...
- 397
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Simulating moving structures of flocks of birds in the sky [closed]
Birds can create fascinating moving structures in the sky, as can be seen here
https://www.youtube.com/watch?v=0dskCpuxqtI
I wonder how such a time-dependent structure can be simulated in Mathematica.
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- 13.2k
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82
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Speed up the evaluation process
I am writing a code to simulate some spins. Following is the main part of the code:
...
- 552
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160
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Need explanation on data[[i]][[1]]
I am trying to train a physics model and then check its profile. For this model, data for physics model is defined with:
...
- 655
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2
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118
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Interpolation function for data with repeating independent variable
I want to find an interpolation function for data in which the x-variable is repeated (example below). The repetition in data is natural and cannot not be eliminated.
Can I somehow use ...
- 631
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DataStructure's "DynamicArray" underperforms Association?
The documentation for DynamicArray states that it is "An extensible array is useful for continuously appending elements, as well as for efficient element extraction and updating."
I tried a ...
- 7,544
1
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2
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125
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Contour plot data extraction and replacing z slices with user defined function
Let's say we have a contour plot of the following,
ContourPlot[Cos[x] + Cos[y], {x, 0, Pi}, {y, 0, Pi},
ContourLabels -> True]
that gives,
we can extract the ...
- 887
2
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1
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145
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How can I join non-overlapping TimeSeries so that the gap between any two is considered to be Missing data?
I have a set of time series sampled at one second intervals.
For example,
...
- 413
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147
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List structure for plotting multiple y-values (with gaps on certain dates) using DateListPlot
I would like to set up a list like this
data = {{Date1,y1,y2,y3,y4,y5,y6},{Date2,y1,y2,y3,y4,y5,y6},...}
and then use DateListPlot to create various plots, e.g. y1 ...
- 267
3
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1
answer
100
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Question on splitting into individual cycle from a list of 30 cycles dataset
Hi I have a set of data and will like to find out I can split these 30 cycles into each individual cycle? Do I use the for loop function in this application. Thanks for the help in advance.
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- 322
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350
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How to rotate matrix? [closed]
Consider the matrix 'm1' :
m1 = RandomReal[{0, 1}, {100, 100}];
The question is, how to rotate the 'm1' data 45 degrees and extract the matrix 'm2' from it (shown ...
- 1,029