Walter Roberson

Last seen: Today | Con actividad desde 2011

Followers: 62 Following: 0

Mensaje

I am currently in the middle of moving, so I am not around very much.

Programming Languages:
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English

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Respondida
For loop operation in ODE45 performs faster than equivalent indexing
index = 1:Nx; % Compute stencil-based fluxes f0(index) = (2/6) * f_ext(index) + (-7/6) .* f_ext(index+1) + (11/6) .* f_ext(ind...

alrededor de 10 horas hace | 0

Respondida
Numeric vector indexing slows down when the vector is a struct field. Why?
I thought struct fields were supposed to behave essentially the same as individual variables, and that dot indexing was just a w...

alrededor de 11 horas hace | 0

| aceptada

Respondida
Standard form of Transfer function.
An intermediate step in converting to natural frequency form is finding the roots of the denominator. It happens that it is po...

1 día hace | 0

Respondida
How to join two images from end to end using matlab and what course of matlab I should learn for that?
Consider using montage

1 día hace | 0

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Writematrix loses precision with string present in data
writematrix(["Test";compose("%.999g", 0.123456789)],"./testB.txt") dbtype testB.txt Retains full precision.

3 días hace | 1

| aceptada

Respondida
can you embed MATLAB figures into webpage?
Your options: run an application on a server that sends out graphics (perhaps using javascript, perhaps using HTML5) distribut...

3 días hace | 1

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plot stem in vertical position
One method is to create a hgtransform and use that as the parent axes of the stem() call. Then set the Matrix property of the hg...

3 días hace | 0

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submit m files for execution via the command line
If you open MATLAB in no display mode, then you will get a MATLAB session that is effectively all command-line and command windo...

4 días hace | 0

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submit m files for execution via the command line
The official way of doing this is to use MATLAB Production Server; https://www.mathworks.com/products/matlab-production-server.h...

4 días hace | 0

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exporting files to matlab
Go ahead and save the file to MATLAB Drive. Then in MATLAB Online use the folder view on the appropriate directory. Right click ...

4 días hace | 0

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How to fix a code?
You created a vector named t . Then in constructing the anonymous function for ode45 purposes, you used @(t,x) equations(t, ...

5 días hace | 0

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writing a mex statement for outputting values of some variables to the console.
https://www.mathworks.com/help/matlab/apiref/mexprintf.html #include "fintrf.h" integer*4 mexPrintf(message) character*(*) m...

5 días hace | 0

Respondida
hi, any tips for mapping 3 nos. of 4x4 matrix (k1, k2, k3) and i need to map it into 8x8 matrix (Kg) and their intersection should add up...
Kg = zeros(8,8); Kg([3 4 1 2], [3 4 1 2]) = K1; Kg([1 2 5 6], [1 2 5 6]) = Kg([1 2 5 6], [1 2 5 6]) + K2; Kg([7 8 1 2], [7 8 ...

5 días hace | 0

| aceptada

Respondida
zero(s) of a nonlinear implicit function
In particular, I want to find a array of outputs for a given array of inputs. That is not possible using fsolve() -- not unless...

6 días hace | 1

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Respondida
No Code to Analyze Add code with code formatting and then click Analyze.
You could get that error if you were using LiveScript and you accidentally inserted your code using "Insert Text" instead of "Co...

7 días hace | 0

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Respondida
Parallel Worker sends "finished" after less then a second of "running" but has a infinite Loop. I dont want it to stop.
https://www.mathworks.com/help/parallel-computing/parallel.pool.dataqueue.html The side that you create the parallel queue on ...

7 días hace | 0

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Does Polyspace (BugFinder and Code prover) support Ada language?
https://www.mathworks.com/products/polyspace-ada.html Polyspace Products for Ada

7 días hace | 0

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What does rng(seed,''5normal") actually means and what they are controlling while generating the matrices?
According to https://www.mathworks.com/help/matlab/ref/randstream.html#mw_cc34b6ad-c7e6-4943-b21b-7d7310a4dd52 "v5normal" corres...

8 días hace | 0

Respondida
Hello. I need to transform a folder of PNG gray pictures to hex files
projectdir = './inputimages'; %directory to look for png files hexfiledir = './hexdir'; %directory to store hex files ...

8 días hace | 0

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Ezyfit: Single vs. Two-Step Fitting Problem
Is there a method or setting within Ezfit to obtain accurate 4-parameter results in a single fitting run (Method A)? No.

8 días hace | 1

| aceptada

Respondida
Cyclic dependency in OOP
You can use dependent properties, perhaps in conjunction with hidden properties. In the example given, you could have a hidden...

8 días hace | 0

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How to vectorize analytical derivative functions for bvp4c?
In order to calculate analytic derivatives, you need to be using the Symbolic Toolbox. If you use a scalar symbolic formula (an...

9 días hace | 0

Respondida
Is it possible to reduce this for loop into one line of code?
Headers(cellfun(@(X)any(ismissing(X),'all'), Headers)) = cellstr("Missing_header_" + find(cellfun(@(X)any(ismissing(X),'all'), H...

9 días hace | 1

Respondida
How to Graph with the endpoints excluded from values
r = 2:0.01:10; r(ismember(r, [2, 10])) = []; %cross-check format long g r(1) r(end)

9 días hace | 0

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Help with converting symbolic gradient/Hessian to anonymous function
matlabFunction(grad, 'Vars', {x}) When you pass a cell array as Vars, then each element of the cell array is a group of variabl...

10 días hace | 1

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Respondida
How to implement FIFO in MATLAB with continuous input
Outline: Q = []; while true check whether data is present if data is present new_data = fetch data; ...

10 días hace | 0

Respondida
Can I create stackedplot with arrays of different row lengths?
First convert the tables into timetables, which might require converting the dates into datetime objects. Then form the union o...

11 días hace | 0

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how to set matlab command window fonts in -nodesktop -nosplash -nojvm mode？
When running MATLAB in -nodesktop -nosplash -nojvm mode, no graphics command input window or output window is created. Instead, ...

11 días hace | 0

Respondida
Directory access failure for some folders Mac Sequoia
System Settings -> Privacy & Security -> Files & Folders -> MATLAB_R2022b, and enable Desktop Folder Note: if some other versio...

11 días hace | 0

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Respondida
Handle warning of "Array is wrong shape or size" when plotting a geopolyshape and setting the ColorData field in MATLAB
https://www.mathworks.com/help/map/ref/map.graphics.chart.primitive.line-properties.html#mw_f88b2538-674c-488f-bc33-da8b68310c74...

11 días hace | 0

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