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Question
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(...
1 month ago | 1 answer | 0
1
answerQuestion
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...
1 month ago | 1 answer | 0
1
answerQuestion
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...
1 month ago | 1 answer | 0
1
answerQuestion
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...
1 month ago | 1 answer | 0
1
answerQuestion
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...
2 months ago | 1 answer | 0
1
answerQuestion
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),'...
5 months ago | 4 answers | 0
4
answersQuestion
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...
5 months ago | 1 answer | 0
1
answerQuestion
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...
5 months ago | 1 answer | 1
1
answerQuestion
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 ...
8 months ago | 1 answer | 0
1
answerQuestion
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...
1 year ago | 1 answer | 0
1
answerQuestion
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...
1 year ago | 3 answers | 0
3
answersQuestion
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: ...
1 year ago | 1 answer | 0
1
answerHow to implement weighted Linear Regression
@John D'Errico do you know how to compute the R^2 value in this weighted case?
1 year ago | 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 ...
1 year ago | 1 answer | 0
1
answerQuestion
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...
1 year ago | 1 answer | 0
1
answerQuestion
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 ...
1 year ago | 1 answer | 0
1
answerQuestion
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...
2 years ago | 2 answers | 0
2
answersQuestion
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...
2 years ago | 1 answer | 1
1
answerQuestion
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...
2 years ago | 1 answer | 0
1
answerQuestion
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,...
3 years ago | 2 answers | 0
2
answersQuestion
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...
3 years ago | 1 answer | 0
1
answerQuestion
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...
3 years ago | 4 answers | 0
4
answersQuestion
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 ...
3 years ago | 2 answers | 0
2
answersQuestion
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...
3 years ago | 2 answers | 0
2
answersQuestion
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...
3 years ago | 1 answer | 0
1
answerQuestion
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...
3 years ago | 0 answers | 0
0
answersQuestion
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...
3 years ago | 1 answer | 0
1
answerQuestion
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...
4 years ago | 1 answer | 0
1
answerQuestion
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...
4 years ago | 2 answers | 0
2
answersQuestion
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...
4 years ago | 1 answer | 0
