Paul Safier

Last seen: circa 2 mesi fa | Attivo dal 2018

Statistics

Content Feed

Domanda

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...

4 mesi fa | 1 risposta | 0

1

risposta

Domanda

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,...

7 mesi fa | 2 risposte | 0

2

risposte

Domanda

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...

8 mesi fa | 1 risposta | 0

1

risposta

Domanda

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...

8 mesi fa | 4 risposte | 0

4

risposte

Domanda

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 ...

9 mesi fa | 2 risposte | 0

2

risposte

Domanda

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...

11 mesi fa | 2 risposte | 0

2

risposte

Domanda

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...

oltre un anno fa | 1 risposta | 0

1

risposta

Domanda

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...

oltre un anno fa | 0 risposte | 0

0

risposte

Domanda

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...

oltre un anno fa | 1 risposta | 0

1

risposta

Domanda

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...

oltre un anno fa | 1 risposta | 0

1

risposta

Domanda

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...

oltre un anno fa | 2 risposte | 0

2

risposte

Domanda

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...

circa 2 anni fa | 0 risposte | 0

0

risposte

Risposto
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...

circa 2 anni fa | 0

Domanda

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, ...

circa 2 anni fa | 1 risposta | 0

1

risposta

Domanda

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...

circa 2 anni fa | 1 risposta | 0

1

risposta

Domanda

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 ...

oltre 2 anni fa | 4 risposte | 0

4

risposte

Domanda

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...

oltre 2 anni fa | 2 risposte | 0

2

risposte

Domanda

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...