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Questions tagged [4d]

4D involves calculations in four dimensions and typically relates to graphics programming. Use the [4d-database] tag for questions about the 4th Dimension database.

From Wikipedia, as of 5 March 2017‎:

In mathematics, four-dimensional ("4D") is a geometric space with four dimensions. It is typically meant to mean four-dimensional Euclidean space, generalizing the rules of three-dimensional Euclidean space. It has been studied by mathematicians and philosophers or over two centuries, both for its own interest and for the insights it offered mathematicians and related fields.

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Error in dat file Exception from IBM ILOG Concert Excel range is unknown

I write a 4D array data for my model, and now it show an error like the title. Anyone help me to fix it? This is a part of the data file: dat file And this is the data file: data demand data D&C I try to find solution on internet but it not work
Nguyễn Thị Thùy Trang
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4D data to 2D contour

I have 4D data, each coordinate is independent: 2.76600e+00, -7.85800e+00, 1.40220e+01, 5.56817e+01 I have a long data, 2 millions points When I plot it I get something like: But then I can't see anything. so I would like to convert my data to 2D…
Eliya_Davidov
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4D input data in LSTM

I have data with a shape of (11242, 4, 5, 200) where num samples = 11242, sequence = 4, Number of items the sample has= 5, A 200D vectorization of the item= 200 That is, each of 11242 people has five items per sequence, and each item is converted…
charmingsoup
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Cinema 4D Python Script Question - OBJ Sequence Player

I'm trying to modify the code which was originally written by Arttu Rautio. Previously I had added child[c4d.ID_BASEOBJECT_GENERATOR_FLAG] = False code and It had worked for a purpose. I need to deactivate the TAG on child object while keeping rest…
grasycho
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how to convert a 4D array into a data frame for post-hoc analysis

I am trying to convert a 4D array into a data frame for host hoc analysis (tukey test) patients_all.shape (14, 91, 109, 91) patients_all ` array([[[[nan, nan, nan, ..., nan, nan, nan], [nan, nan, nan, ..., nan, nan, nan], [nan,…
ellie
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Mapping 3D Scatter Points with Unique, Interpolated Colors

So I'm trying to create a 3dscatter plot using matplotlib and have had issues trying to map each individual point to a heat map value. My end goal is to have a 4d graph that visualizes my data. The issue is that some of my data points are repeated…
user20453364
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How to define a tuple for reading 4 dimensional parameter in cplex .mod file and .dat file?

How can I read data 4D from Excel file for MILP model in Cplex? I want to know how to define this parameter and apply in constraint enter image description here enter image description here
H Bagheri
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4D graph in gnuplot Haskell package

I am trying to use gnuplot package for Haskell (https://hackage.haskell.org/package/gnuplot) for building a 4D plot as described here (4D plot with gnuplot). But I cann't figure out how to set appropriate 3DGraph type. My problem is to draw a…
Stanislav B.
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Is there a method to preform matrix multiplication through a 4d array (row-wise) in python, without using for loops?

So I have setup a 4d numpy array, and I'm trying to preform matrix multiplication row-wise in the 4d array. I'm trying to not use a for loop and np.linalg.multi_dot for the sake of trying to keep the programme as fast as possible. This is what it…
FlamingosAreSad
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Is there a way to determine the new position of entity E, given angles and distance in higher than 3 dimensions?

I want to be able to take a given Entity E, it’s current facing angles, it’s origin position, and then find the coordinates of a future point given a distance. I know there are many ways to do it in 2d and 3d, but I want to figure it out for any N…
Endleon
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I'm trying to project 4D lines to 3D to 2D and clip them at z=p and w=p, but I'm not sure if it's rendering correctly

I've been trying to write a program that can render 4D lines, the specific function doing this gets the lines already rotated, and the function attempts to clip the lines at planes z = p and w = p if needed, and then draw the line to the screen. I…
Joe Dimagio
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4D plot surface does'nt display the colors of my 4th dimension

I've been trying de plot 4D figures of aerosols emissions in the atmosphere with X = Longitude, Y = latitude, Z = Injection Heigh of aerosols and cbar = Emissions quantity. The following lines do the job but the cbar datas seems to be 0…
Thomas V
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Define matrices in an array element C++

I have written some c++ code that receives a Matrix as input and now I want to create a 2D array with matrices in each element so that I can send the individual matrices to the function. typedef vector< vector > Matrix; double a[2][2] = Matrix(2,…
Kristoffer Lindvall
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How to graph, using ggplot2, a data frame with 3 independent discrete variables and a continuous dependent variable? (Other packages are welcome too)

I have a data frame with 3 discrete and independent variables. These variables were combined with each other and the result of the combination generated a value for each set (continuous and numerical dependent variable). So far I have not been able…
Daniel Valencia C.
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speeding up griddata 4D interpolation with unstructured data

I know there are some similar threads on this topic, but I read almost all of them, yet the solutions are not applicable to my specific (4D, unstructured data) case. I want to interpolate my values (on points) on a 4D meshgrid. I use griddata of…
sonqz
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