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Paul Safier


Last seen: 2 Tage vor |  Aktiv seit 2018

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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 ...

20 Tage vor | 1 Antwort | 0

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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...

7 Monate vor | 1 Antwort | 0

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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...

10 Monate vor | 3 Antworten | 0

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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: ...

10 Monate vor | 1 Antwort | 0

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

10 Monate vor | 0

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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 ...

12 Monate vor | 1 Antwort | 0

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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...

12 Monate vor | 1 Antwort | 0

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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 ...

etwa ein Jahr vor | 1 Antwort | 0

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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...

mehr als ein Jahr vor | 2 Antworten | 0

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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...

mehr als ein Jahr vor | 1 Antwort | 1

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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...

etwa 2 Jahre vor | 1 Antwort | 0

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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,...

etwa 2 Jahre vor | 2 Antworten | 0

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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...

mehr als 2 Jahre vor | 1 Antwort | 0

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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...

mehr als 2 Jahre vor | 4 Antworten | 0

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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 ...

mehr als 2 Jahre vor | 2 Antworten | 0

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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...

mehr als 2 Jahre vor | 2 Antworten | 0

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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...

etwa 3 Jahre vor | 1 Antwort | 0

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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...

etwa 3 Jahre vor | 0 Antworten | 0

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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...

etwa 3 Jahre vor | 1 Antwort | 0

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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...

etwa 3 Jahre vor | 1 Antwort | 0

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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...

etwa 3 Jahre vor | 2 Antworten | 0

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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...

mehr als 3 Jahre vor | 1 Antwort | 0

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Beantwortet
convolution with gaussian kernel using fft
@David Goodmanson: Can you point me to where you found the 3.53 value? All this discussion has led me to conclude that sin...

mehr als 3 Jahre vor | 0

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Extract Gridded Data from Isosurface
I want to get the x, y and z data of a surface that I extract from a volume via isosurface. I am doing it in the following way, ...

mehr als 3 Jahre vor | 1 Antwort | 0

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Parfor Loop Error with Classification
When trying to convert the outer loop of the code below to a parfor loop, the error is: Error: The variable z_new in a parfor...

mehr als 3 Jahre vor | 1 Antwort | 0

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Solve as Optimization Problem in Matlab
I want to solve this simple equation as an optimization problem in Matlab. I have tried linprog, fmincon and fminunc and all do ...

etwa 4 Jahre vor | 4 Antworten | 0

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Change folder that Matlab saves session information
I run Matlab on Linux machines. Matlab is saving session information (e.g. History.xml, parallel_settings, etc) in a folder cal...

etwa 4 Jahre vor | 2 Antworten | 0

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Remove Internal Faces from Geometry
Is it possible to remove the internal faces of this geometry: pdem = createpde; g = multicuboid(40,40,0.1*ones(10,1),'Zoffse...

mehr als 4 Jahre vor | 0 Antworten | 0

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Coefficient Multiplying Laplacian Implicit in Neumann BC?
I'm solving the parabolic equation: I set up the PDE as: specifyCoefficients(model,'m',0,'d',1,'c',D,'a',0,'f',0); and ...

mehr als 4 Jahre vor | 0 Antworten | 0

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Mesh the Inside of a 3D Patch
I am trying to solve a PDE via the PDE Toolbox and am having trouble building the mesh/geometry. I have built the volume via the...

mehr als 4 Jahre vor | 0 Antworten | 0

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