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Dear all, I have the following integral. Standard numerical integration (direct summation) takes about 40 seconds on a regular PC. Any tricks to reduce this to a few seconds?
Ny = 50; rng(655321); M2Ny = rand(2*Ny, 2*Ny); ZNy = zeros(Ny, Ny); INy = eye(Ny); I2Ny = eye(2*Ny); C = @(k1, Ny) [exp(-1...
Dear all, I have the following integral. Standard numerical integration (direct summation) takes about 40 seconds on a regular PC. Any tricks to reduce this to a few seconds?
Ny = 50; rng(655321); M2Ny = rand(2*Ny, 2*Ny); ZNy = zeros(Ny, Ny); INy = eye(Ny); I2Ny = eye(2*Ny); C = @(k1, Ny) [exp(-1...
circa 11 ore fa | 1
Risposto
uicontrol edit field .String doesn't visually update from KeyReleaseFcn unless a breakpoint is set
uicontrol for traditional figure has the property that the String property does not update visually until one of two circumstanc...
uicontrol edit field .String doesn't visually update from KeyReleaseFcn unless a breakpoint is set
uicontrol for traditional figure has the property that the String property does not update visually until one of two circumstanc...
circa 12 ore fa | 0
Risposto
Does MATLAB phone home on startup? (Startup time with VPN and without VPN)
It looks to me as if MATLAB connects to licensing.mathworks.com upon startup. There are other connections from MATLAB Service ...
Does MATLAB phone home on startup? (Startup time with VPN and without VPN)
It looks to me as if MATLAB connects to licensing.mathworks.com upon startup. There are other connections from MATLAB Service ...
9 giorni fa | 0
| accettato
Risposto
Method for returning only the image portion of a Figure?
for i = 1:20 img = imread(sprintf('ULAMovePerp_full/%s',contents(i).name)); img_cropped = img(70:580,161:1020,:); ...
Method for returning only the image portion of a Figure?
for i = 1:20 img = imread(sprintf('ULAMovePerp_full/%s',contents(i).name)); img_cropped = img(70:580,161:1020,:); ...
10 giorni fa | 2
| accettato
Risposto
Execution of script mpower as a function is not supported
Your D:\App Files\MATLAB\toolbox\matlab\matfun\mpower.m is probably corrupted. In R2025b at least, mpower really is a MATLAB f...
Execution of script mpower as a function is not supported
Your D:\App Files\MATLAB\toolbox\matlab\matfun\mpower.m is probably corrupted. In R2025b at least, mpower really is a MATLAB f...
11 giorni fa | 0
Risposto
Issues with specifying the renderer in MATLAB 2026a for graphics
MATLAB no longer uses OpenGL at all, as of R2025a. OpenGL is no longer an option at all, and can no longer be selected. https...
Issues with specifying the renderer in MATLAB 2026a for graphics
MATLAB no longer uses OpenGL at all, as of R2025a. OpenGL is no longer an option at all, and can no longer be selected. https...
22 giorni fa | 0
Risposto
Can MacBook Air apple silicon install Matlab 2025b
That should work fine in practice. There is the possibility that there will be problems because the operating system on the 202...
Can MacBook Air apple silicon install Matlab 2025b
That should work fine in practice. There is the possibility that there will be problems because the operating system on the 202...
22 giorni fa | 0
| accettato
Risposto
Draw a circle at the end of a quiver3 line
Depending on the accuracy you need for the circle: The traditional way to handle this is to plot points with marker 'o' and app...
Draw a circle at the end of a quiver3 line
Depending on the accuracy you need for the circle: The traditional way to handle this is to plot points with marker 'o' and app...
29 giorni fa | 0
Risposto
User wants to use license in China
Mathworks wants to be sure that you are not importing a less expensive license into a more expensive region. So if you are tryi...
User wants to use license in China
Mathworks wants to be sure that you are not importing a less expensive license into a more expensive region. So if you are tryi...
circa un mese fa | 0
Risposto
How to roll back to a previous update WITHIN THE SAME VERSION?
See https://www.mathworks.com/matlabcentral/answers/2136533-how-can-i-download-the-installer-for-a-previous-update-of-matlab "...
How to roll back to a previous update WITHIN THE SAME VERSION?
See https://www.mathworks.com/matlabcentral/answers/2136533-how-can-i-download-the-installer-for-a-previous-update-of-matlab "...
circa un mese fa | 0
Risposto
Rapid calculation of the number of points in a circular neighbourhood
If the set of points is constant, but the location to examine varies, then historically an efficient implementation has been to ...
Rapid calculation of the number of points in a circular neighbourhood
If the set of points is constant, but the location to examine varies, then historically an efficient implementation has been to ...
circa un mese fa | 1
Risposto
Get and install Mapping Toolbox for R2021a
If you are using a quite recent version of MATLAB (latest two releases, three at most), then: Select the HOME tab in the tool r...
Get and install Mapping Toolbox for R2021a
If you are using a quite recent version of MATLAB (latest two releases, three at most), then: Select the HOME tab in the tool r...
circa un mese fa | 0
Risposto
How to ensurethat the sum([0.7 0.2 0.1])==1 return true when testing equivalence relation
sum(sym([0.7 0.2 0.1])) == 1 isAlways(ans) sum(cellfun(@sym,{'0.7' '0.2' '0.1'})) == 1 isAlways(ans) sum([7 2 1])/10 == 1
How to ensurethat the sum([0.7 0.2 0.1])==1 return true when testing equivalence relation
sum(sym([0.7 0.2 0.1])) == 1 isAlways(ans) sum(cellfun(@sym,{'0.7' '0.2' '0.1'})) == 1 isAlways(ans) sum([7 2 1])/10 == 1
circa un mese fa | 1
Risposto
"I want to download without installing" is not available in the drop down menu
Use https://www.mathworks.com/downloads/ and select the proper release, and download the installer. Run the installer, and sign ...
"I want to download without installing" is not available in the drop down menu
Use https://www.mathworks.com/downloads/ and select the proper release, and download the installer. Run the installer, and sign ...
circa 2 mesi fa | 0
Risposto
Changed behaviour in paste to cmd in R2026a
This behaviour changed as of R2024a, which corresponded to the start of the new desktop. I would not inherently expect there t...
Changed behaviour in paste to cmd in R2026a
This behaviour changed as of R2024a, which corresponded to the start of the new desktop. I would not inherently expect there t...
circa 2 mesi fa | 0
| accettato
Risposto
No more machine transfers available
You should contact Mathworks support. The Terms of Use place a limit on the number of times you are allowed to transfer the lic...
No more machine transfers available
You should contact Mathworks support. The Terms of Use place a limit on the number of times you are allowed to transfer the lic...
circa 2 mesi fa | 0
Risposto
Symbolic expression output changes when turned into function?
%Define the mean and standard deviation of the target normal distribution %curve. mu = 7.5; stdev = 2.5/2; %Define the fun...
Symbolic expression output changes when turned into function?
%Define the mean and standard deviation of the target normal distribution %curve. mu = 7.5; stdev = 2.5/2; %Define the fun...
circa 2 mesi fa | 0
Risposto
Alternative for linspace?
You can see from the below that none of the obvious methods exactly matches linspace() If I recall correctly, linspace breaks t...
Alternative for linspace?
You can see from the below that none of the obvious methods exactly matches linspace() If I recall correctly, linspace breaks t...
circa 2 mesi fa | 0
Risposto
How to parse ASCII string-based temperature values from Covesion OC3 controller in MATLAB App Designer
The historical way to do this kind of work was to use regexp to extract the components of the number (as character vectors), and...
How to parse ASCII string-based temperature values from Covesion OC3 controller in MATLAB App Designer
The historical way to do this kind of work was to use regexp to extract the components of the number (as character vectors), and...
2 mesi fa | 0
Risposto
installation question. I downloaded for an offline installation since I have an installation key. However, when I run the installer from the downloaded files, nothing runs.
The Mac bundles are not signed with a security certificate, so MacOS treats them as untrusted software. It used to be the case ...
installation question. I downloaded for an offline installation since I have an installation key. However, when I run the installer from the downloaded files, nothing runs.
The Mac bundles are not signed with a security certificate, so MacOS treats them as untrusted software. It used to be the case ...
2 mesi fa | 0
Risposto
How to call kummerU for a stand alone program
Unfortunately, kummerU is defined strictly by the Symbolic Toolbox, and nothing in the Symbolic Toolbox can be compiled. You wo...
How to call kummerU for a stand alone program
Unfortunately, kummerU is defined strictly by the Symbolic Toolbox, and nothing in the Symbolic Toolbox can be compiled. You wo...
2 mesi fa | 0
Risposto
How to transfer a master license to a new server
Master licenses are containers holding other licenses; https://www.mathworks.com/matlabcentral/answers/367335-what-is-the-differ...
How to transfer a master license to a new server
Master licenses are containers holding other licenses; https://www.mathworks.com/matlabcentral/answers/367335-what-is-the-differ...
2 mesi fa | 0
Risposto
It wants probability of a copier
syms lambda k pk = lambda^k * exp(-k) / factorial(k) pk100 = subs(pk, k, 100) Lambda = solve(pk100 == sym(25)/1000); Lambda ...
It wants probability of a copier
syms lambda k pk = lambda^k * exp(-k) / factorial(k) pk100 = subs(pk, k, 100) Lambda = solve(pk100 == sym(25)/1000); Lambda ...
3 mesi fa | 0
Risposto
MATLAB 30-Day Trial Issue
There are a few main possible reasons why a trial might be denied: if you had requested another trial "too recently". Mathworks...
MATLAB 30-Day Trial Issue
There are a few main possible reasons why a trial might be denied: if you had requested another trial "too recently". Mathworks...
3 mesi fa | 0
Risposto
Como puedo reactiva una licencia 2022a cuando se cambia de computador
Go to the license center https://www.mathworks.com/mwaccount/?s_tid=user_nav_myac and there click on your license. In the page ...
Como puedo reactiva una licencia 2022a cuando se cambia de computador
Go to the license center https://www.mathworks.com/mwaccount/?s_tid=user_nav_myac and there click on your license. In the page ...
3 mesi fa | 0
Risposto
How does this block diagram convert input current to per unit value?
Input values are multiplied by 2^6. Note that Qu<<6 has the same effect as Vu*2^6 for integer-type values, except that the undef...
How does this block diagram convert input current to per unit value?
Input values are multiplied by 2^6. Note that Qu<<6 has the same effect as Vu*2^6 for integer-type values, except that the undef...
3 mesi fa | 0
Risposto
I switch from 2024a to 2026a, and I am scared : the plottools which was very efficient to manage graph appearance, has gone !
If you are referring to the plot browser, https://www.mathworks.com/matlabcentral/answers/2177364-plot-browser-in-r2025a#answer_...
I switch from 2024a to 2026a, and I am scared : the plottools which was very efficient to manage graph appearance, has gone !
If you are referring to the plot browser, https://www.mathworks.com/matlabcentral/answers/2177364-plot-browser-in-r2025a#answer_...
3 mesi fa | 0
| accettato
Risposto
Attempting to reproduce a backward bifurcation C-curve using analytically derived coefficients a1, a2, a3 in MATLAB but my implementation is not producing the expected C-shape
a1 is on the order of 1e-7 . You are dividing by a1, so you are magnifying values by about 1e7 It so happens that when you calc...
Attempting to reproduce a backward bifurcation C-curve using analytically derived coefficients a1, a2, a3 in MATLAB but my implementation is not producing the expected C-shape
a1 is on the order of 1e-7 . You are dividing by a1, so you are magnifying values by about 1e7 It so happens that when you calc...
3 mesi fa | 0
Risposto
how to generate this sawtooth waform with phase shift of 4pie/5
Subtract the coordinate of the beginning of the period from x Take the subtracted coordinate mod the length of the period adju...
how to generate this sawtooth waform with phase shift of 4pie/5
Subtract the coordinate of the beginning of the period from x Take the subtracted coordinate mod the length of the period adju...
3 mesi fa | 0
Discussion
non-NVIDIA GPU support ?
https://www.techradar.com/computing/gpu/nvidia-really-doesnt-seem-to-care-about-gaming-gpus-anymore-the-company-wont-even-bother...
3 mesi fa | 0
