Questions tagged [data]
Questions on systematic data handling and analysis, including data correction, manipulation, or selection of user-data or built-in data available with Mathematica.
896
questions
7
votes
9
answers
788
views
Visualization of two nearly identical datasets of 2D points
This question is similar to
Best way to plot nearly identically overlapping data?
In my case I have two clouds of 2D points that are nearly identical. If I draw them into the same coordinate system, ...
- 193
0
votes
0
answers
58
views
Automatic evaluation of a function for variable values defined from different data tables in the attachments
I want to evaluate a function whose variable values are defined in different data files. I want to know that how can I write code such that when the function's evaluation is exhausted for one table, ...
- 307
3
votes
4
answers
295
views
Volume of Region Contained by 3D Data Points
I have a dataset consisting of (x,y,z) data that describe a surface, and I need to find the volume of the region bounded by that surface. The data do not follow any mathematical equation, but the ...
- 85
4
votes
4
answers
331
views
1
vote
1
answer
46
views
0
votes
1
answer
55
views
Fitting data to peaks visually with manipulate - how to compactly implement for many peaks
I am trying to create a visual aid for peak fitting. There should be a background profile and on top, I want to place peaks. So far, I am stuck with the following issue. For simplicity, I am using a ...
- 3,703
0
votes
0
answers
50
views
Solutions for Storing Large Amounts of Data for Re-Import into Mathematica
The Problem
I have a decently large amount of data that I'm performing a bunch of computation on. My typical M.O. in Mathematica is to use Table to generate a ...
- 490
3
votes
1
answer
166
views
1
vote
1
answer
135
views
How to prefetch all Entity types?
I would like to prefetch all entity types. How can I speed up computations by prefetching all entity types?
This question is unique from other questions because I am interested in the exact mechanisms ...
- 1,653
4
votes
5
answers
292
views
1
vote
3
answers
203
views
Finding a continuous distribution that fits the empirical density of dataset $1,1/4,1/9,1/16\ldots$
I have a list of coefs of the form $1,1/4,1/9,1/16,\ldots,1/d^2$ sampled with relative sampling frequencies $1,1/4,1/9,1/16,\ldots,1/d^2$.
How do I find a nice continuous density whose CDF closely ...
- 8,059
3
votes
2
answers
62
views
Selecting particular data with a particular string at-first
I have a dataset and I want to select the only data that starting with C_i (where "i" is a numeric with variability).
Here is my dataset:
...
- 411
1
vote
1
answer
45
views
How do I assign PlotMarkers based on two different variables?
I'm trying to create ternary diagrams with 6 data points (samples) that each have two values - a type and a location. I have these two pieces:
...
- 11
2
votes
1
answer
75
views
How to plot properly the disconnected regions if using the option Joined->True?
Consider the following domain:
...
- 4,984
1
vote
1
answer
64
views
How to define the boundary of the 2D region outside of the list of sub-regions?
Consider the following file. It includes a list of tables defining some regions.
...
- 4,984
1
vote
1
answer
73
views
0
votes
1
answer
35
views
saving output and ListPlot the output:
Let's say I have
x = 1; y = 2;
d = x^2 + y^5 ;
and
x = 5; y = 3;
d = x^2 + y^5 ;
and
...
- 811
1
vote
0
answers
64
views
How to Name a Path in TemporalData?
Preamble:
I am working with stock prices and need to perform calculations on them. And then extract the information for further calculations.
TimeSeries/...
1
vote
2
answers
90
views
Importing an unusually formatted text file and converting to CSV
I have some data that looks like:
...
- 1,937
1
vote
1
answer
51
views
Mathematica truncates output from an external python session
I am running an external python session in Mathematica via ExternalEvaluate. It sends commands to the Bloomberg API in command prompt on Microsoft Windows.
I start ...
- 1,937
3
votes
0
answers
165
views
FindDistribution analog: automated data modeling with all Wolfram statistical distributions
BOUNTY GOAL
To get bounty I am asking to build a function that serves as an analog of FindDistribution. You can also simply re-implement ...
- 70.8k
7
votes
2
answers
212
views
Measurement error propagation onto fitting-parameters
I have a dataset consisting of (t,y) Tuples, where each y has a known measurement error (standard deviation). I would like to fit a trapaze-function into the data and obtain the fitting paramaters and ...
- 73
2
votes
2
answers
110
views
Multiply a table with a sub-table of another table
Consider two grids of coordinates:
grid1 = Flatten[Table[{i, j}, {i, 1, 15}, {j, 1, 20}], 1]//N;
grid2 = Flatten[Table[{0.5 i, 0.5 j}, {i, 1, 45}, {j, 1, 60}], 1];
...
- 4,984
0
votes
0
answers
31
views
Question about the behavior of a data point as a function of time
I have a set of data points. The first coordinate is time and the second coordinate is energy. I am trying to figure out how the energy is decaying over time. Particularly, I have to find if it is ...
- 99
1
vote
1
answer
115
views
Periodogram and frequency
On the x axis of periodogram, one should have either a period or frequency. What frequency is used in Periodogram --- angular or ...
- 3,703
3
votes
2
answers
150
views
Partition of lists with specified elements
I have an array like this and want to split it into sublists. It should contain the first element "Res" without curly braces and the one sublist starts from 2 to the 9th column the 3rd ...
- 73
2
votes
1
answer
85
views
Partion of lists
I have a list like this and want to split it into three sublists. One should contain only the first element the 2nd should contain 8 elements starting from 1.944 to 11 and the third should start from ...
- 73
3
votes
2
answers
125
views
How to create a GroupBy function that is better aligned with relational algebra?
I want a GroupBy function that behaves more in alignment with relational algebra principles.
I can get what I want if I do it in 2 steps:
Preparation:
...
- 918
0
votes
2
answers
34
views
Listsorting and ContourPlot from list of number: [closed]
Lets say I have a list of number:
data={2,3,4,5,9,7,4,8,9}
Can we plot a ContourPlot or ListContourPlot from list?
Or
Should it needed to be save in the following ...
- 811
4
votes
6
answers
133
views
Replacing elements of one table with the elements of another table for common grid
Consider two tables:
tab1=Flatten[Table[{i,j,0},{i,0.5,0.7,0.1},{j,0.1,0.3,0.1}],{1,2}];
tab2=Flatten[Table[{i,j,i*j},{i,0.5,0.7,0.2},{j,0.1,0.3,0.2}],{1,2}];
...
- 4,984
0
votes
0
answers
23
views
Smoothening noisy distributions to learn eigenvalue statistics
I have a problem involving random matrices, in which I'm trying to learn properties of their spectral statistics. The problem I'm having can be boiled down to a list management issue, but I will begin ...
- 647
2
votes
1
answer
91
views
Error in Discrete Fourier Transform
Consider this data. I would like to plot it via it Fourier discrete sine transform. However, I am getting a slight offset, as seen here
...
- 4,187
4
votes
1
answer
60
views
How can we get/calculate all the available FinancialIndicators outside TradingChart and InteractiveTradingChart?
How can we get/calculate all the available FinancialIndicators outside TradingChart and ...
- 1,536
6
votes
2
answers
136
views
How to deal with Around[list] not evaluating if the list elements have Around Head instead of being numeric?
Background
I like using Around for data analysis so I can easily keep track of measurement spread and uncertainties. It also automatically produces plots with error ...
- 35.8k
1
vote
2
answers
69
views
Interpolation with replacing start and end values;
I have a list of data,
data={1.61,37.23,61.83,73.14,79.36,83.88,94.06,96.60,97.73,98.86,99.43,100};
aa=ListPlot[data]
which looks like the following,
is there ...
- 811
0
votes
1
answer
51
views
How to perturb data along a midline?
Consider the following data, which can be obtained here
ListLinePlot[data, Frame -> True]
I want to perturb the previous data around a defined midline, which ...
- 4,187
1
vote
2
answers
71
views
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 ...
- 811
8
votes
2
answers
226
views
How can we stop ListDensityPlot to show results outside data range when using InterpolationOrder -> 0?
I have this data
b = .1 {{1, 1}, {0, 1}};
pts = Tuples[Range[-20, 20], 2] . b;
data = {#[[1]], #[[2]], Sin[#[[1]] #[[2]]]} & /@ pts;
I would like to use <...
- 4,215
1
vote
1
answer
49
views
Showing limited amount of data in manipulate function
I am trying to simulate Logisticmap equation(xn+1 = r*xn(1 − xn)) for two very slightly different initial conditions and compare them after N iterations. This code works fine, but for very very nearby ...
3
votes
2
answers
127
views
Importing scientific data with uncertainties and units
I want to import scientific data from a CSV file. The data are length measurements in centimeters with uncertainties. I want to import the data with uncertainties and units into a vector - please see ...
- 129
0
votes
1
answer
85
views
I want to graph a heatmap for three parameter data
I want to plot a heatmap where $x$ varies from $0.1$ to $1$, $y$ varies $0.1$ to $1$, and a third parameter representing image generation times for different $(x,y)$ will be the input to a ...
2
votes
1
answer
181
views
Plot all real and imaginary roots of FindRoot vrs `k`
I'm looking to plot all real and imaginary roots of this cubic equation
eq[x_,k_]:=x^3-5x^2+x-k
as a function of a real parameter ...
- 693
3
votes
1
answer
39
views
Moving Average not returning floats for time series [closed]
I have thousands of rows of time series data in the form below:
...
- 1,076
0
votes
0
answers
31
views
Interpreter error: Restriction Failure
I'm trying to pull some data from the Metropolitan Museum's API to make a visualization. I've written some code to pull the "culture" data and convert that into Country Entities so that ...
- 1
2
votes
1
answer
93
views
Dealing with locally defined functions in Module while exporting/importing
Consider the following example module:
...
- 4,984
0
votes
0
answers
104
views
10
votes
7
answers
647
views
0
votes
2
answers
76
views
How can I plot a set of data in which each subset has three elements
let's assume this the set of data
{{a1,b1,c1},{a2,b2,c2}........{a10,b10,c10}}
plot a vs b and a vs c
I have tried plotting this using ListLinePlot function but it didn't work
- 41
1
vote
1
answer
95
views
How does ListLogLinearPlot work and can it obtained from a ListPlot?
Consider the following example plot for some point data
ListLogLinearPlot[data[[All, {1, 2}]], Joined -> True]
I need to know exactly how ...
- 1,492
1
vote
2
answers
98
views
Extract data points from ContourPlot3D
I have a ContourPlot3d shown below. There are some posts (157477) (3015) (19859)
that showed how to extract points using a combination of ...
- 551