Paul Safier

Last seen: 9 jours il y a | Actif depuis 2018

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Pass Additional Arguments into Guess Function for BVP
In the example given here: Matlab BVP Example What would be the syntax (if it's even possible) to pass an additional argument(...

8 mois il y a | 1 réponse | 0

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Question

Solve BVP with Arrays as Coefficients
Can bvp4c and/or bvp5c be used to solve a boundary value problem where the coefficients (or terms) of the BVP are provided by an...

8 mois il y a | 1 réponse | 0

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Question

Orthotropic Conductivity on Face
Hi. My domain is as shown in the images attached. I am trying to place orthotropic conductivity on face 3 and uniform conductiv...

8 mois il y a | 1 réponse | 0

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Question

Average Flux Across Edge
Hi. I need to compute the average flux across the edge in the diagram that is of length xa. Shouldn't the results from the funct...

8 mois il y a | 1 réponse | 0

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Question

Apply Dirichlet BC on Vertex
For solvability my problem needs to have at least a single boundary node set as Dirichlet. From the image attached, I would like...

8 mois il y a | 1 réponse | 0

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Question

Convert Set of (x,y) Coordinates Into Polygon
I converted the attached coordinates (x,y) into an alphashape. See image. shp = alphaShape(coordinates(:,1),coordinates(:,2),'...

11 mois il y a | 4 réponses | 0

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Question

Find Max Delta of Sliding 3x3 Window Over Matrix
I have the code below to find the max delta between a point and its 8 neighbors in a sliding 3x3 window. I do this for the whole...

11 mois il y a | 1 réponse | 0

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Question

imerode/imdilate use convolution?
Do imerode and imdilate use a convolution (e.g. conv2) under the hood? The source code is not available with their respective .m...

11 mois il y a | 1 réponse | 1

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Question

Decode text with native2unicode
I have a vector that should be the header names from some data that was obtained via a metrology software program. I believe it ...

environ un an il y a | 1 réponse | 0

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Question

Plot Stacked Surfaces with Coloring Appropriate for each Individual Surface
I'm trying to plot several surfaces on top of each other and have their coloring be appropriate for each individual surface base...

plus d'un an il y a | 1 réponse | 0

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Question

Stacked Cuboid for PDE Domain
Can the following domain be created for use in the PDE Toolbox? It does not seem that ordinary operations with the multicuboid f...

presque 2 ans il y a | 3 réponses | 0

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Question

What formula for r-squared does fitlm use in the weighted linear regression case?
If I use fitlm as: mdl = fitlm(X,Y,'Weights',W); can someone tell me the formula used in computing the r-squared that's here: ...

presque 2 ans il y a | 1 réponse | 0

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Réponse apportée
How to implement weighted Linear Regression
@John D'Errico do you know how to compute the R^2 value in this weighted case?

presque 2 ans il y a | 0

Question

Extrude 2D Domain into 3D
I am having trouble extruding a 2D domain into a 3D domain for use in the PDE Toolbox. Perhaps I cannot use decsg to create the ...

environ 2 ans il y a | 2 réponses | 0

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Question

pdeplot with same colorbar range
I am trying to plot the results of solving the transient heat equation. I want to use pdeplot to show the temperature distributi...

environ 2 ans il y a | 1 réponse | 0

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Question

Trouble concatenating a cell.
I want to concatenate the cell in the image such that rows 1,2 and10 are expanded, i.e. rows 1 and 2 each become 4 rows. Row 10 ...

plus de 2 ans il y a | 1 réponse | 0

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Question

Code Fails to Write to Folder that has Correct Write Permissions
This question is a follow-up to the one answered by @Walter Roberson here: https://www.mathworks.com/matlabcentral/answers/2001...

plus de 2 ans il y a | 2 réponses | 0

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Question

MATLAB won't run a code even when in directory containing the code
I try to run a code initially from my home directory. Matlab states that the code exists in a specific folder and I should navig...

plus de 2 ans il y a | 1 réponse | 1

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Question

What is the output when Particle Swarm Optimization exceeds MaxTime
I ran the following PSO code and the MaxTime was exceeded. The code spit out a result, but I don't know: Is it the best soluti...

environ 3 ans il y a | 1 réponse | 0

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Question

Problems clustering with kmeans
I have a data set that is x,y,v. Each vector is quite long, ~2 million rows. Also, the data is scattered, i.e. not at regular x,...

plus de 3 ans il y a | 2 réponses | 0

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Question

Can one of MATLAB's optimization algorithms (e.g. particle swarm optimization) take the place of this brute force parameter sweep iteration?
I want to find an optimal set of parameters but the time to run through every combination (in a brute force parameter sweep) wil...

plus de 3 ans il y a | 1 réponse | 0

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Question

Each PARFOR Worker Writes to the Same File
I understand that having each worker write to a single file is a no-no. Perhaps as expected, when I run this code, it shows so...

plus de 3 ans il y a | 4 réponses | 0

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Question

PARFOR is 10X Slower than FOR
I'm trying to understand why my use of the parfor is so much slower than using a for loop. Both parfor and for implementations ...

plus de 3 ans il y a | 2 réponses | 0

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Question

Error using Table with New Installation of 2022a
When I run these simple commands, I get the following error. I'm not sure where to look to address this. xmin=1; xmax=2; ymin...

plus de 3 ans il y a | 2 réponses | 0

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Question

Course Summaries Document Available to Download/Print?
After completing some Onramp courses, I wanted to get a copy (to print for hard copy) of the course summary that lists the speci...

environ 4 ans il y a | 1 réponse | 0

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Question

Advice on Speeding up Loops
I need to run the code below with the parameter amnt equal to about 10^8. The loops are very expensive and I have written in a w...

plus de 4 ans il y a | 1 réponse | 0

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Question

Convert a matrix of doubles to an RGB image, and then back to a matrix of doubles (ideally matching the original)?
Can someone offer any advice on how one could take a matrix of doubles, convert it to an RGB image, and then BACK to the origina...

plus de 4 ans il y a | 1 réponse | 0

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Question

Techniques for blending images that have overlap
I have some images that all overlap each other by a known amount (e.g. 15% of the pixels on along a side). No registration shoul...

plus de 4 ans il y a | 1 réponse | 0

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Question

How to get matrix indices from roipoly
I have a matrix that I want to extract an ROI from. I am using roipoly to clip the region. The syntax below gives the coordinate...

plus de 4 ans il y a | 2 réponses | 0

2

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Question

Gaussian filter with fspecial versus imgaussfilt
I have two questions. First, I want to filter a function with a Gaussian that has a standard deviation with dimensions of length...

plus de 4 ans il y a | 1 réponse | 0

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