Answered

Run 3 screens at a time/parallel screen

https://www.bu.edu/comtech/faculty-staff/classroom-av/instructor-station-desktop-mirroring/ has Windows 10 instructions with dia...

Run 3 screens at a time/parallel screen

https://www.bu.edu/comtech/faculty-staff/classroom-av/instructor-station-desktop-mirroring/ has Windows 10 instructions with dia...

6 hours ago | 0

Answered

I am trying to code the inverse power method but the outcome of the eigenvector was half of the correct answer. Is there a way to fix it?

eigenvectors are direction but not magnitude. If v is an eigenvector of a matrix then so is m*v for all nonzero scalar m. Theref...

I am trying to code the inverse power method but the outcome of the eigenvector was half of the correct answer. Is there a way to fix it?

eigenvectors are direction but not magnitude. If v is an eigenvector of a matrix then so is m*v for all nonzero scalar m. Theref...

10 hours ago | 0

| accepted

Answered

Find only numeric strings on cellstr array.

arr = {'123', 'Hola', 'my', 'String', '', '1453', 'stay'}; find(~cellfun(@isempty, regexp(arr, '^\d+$', 'once'))) find(matc...

Find only numeric strings on cellstr array.

arr = {'123', 'Hola', 'my', 'String', '', '1453', 'stay'}; find(~cellfun(@isempty, regexp(arr, '^\d+$', 'once'))) find(matc...

12 hours ago | 1

Answered

Error using <= Not enough input arguments

Reff= Ric+Rbuc+2*Rg+2*Rluc; That is a mathematical computation. The result is going to be numeric. F=Reff.kphi;; Reff is nume...

Error using <= Not enough input arguments

Reff= Ric+Rbuc+2*Rg+2*Rluc; That is a mathematical computation. The result is going to be numeric. F=Reff.kphi;; Reff is nume...

13 hours ago | 1

Answered

How to improve efficiency when checking for unique combinations of table values?

findgroups the two columns individually. Concatenate the groups into one array of two columns. Use those as the first parameter ...

How to improve efficiency when checking for unique combinations of table values?

findgroups the two columns individually. Concatenate the groups into one array of two columns. Use those as the first parameter ...

15 hours ago | 0

Answered

What is the best way to turn a time vector into something plottable when you have large quantities of data?

filter the entire data by p1 and p2 giving you 6 columns. pass the 6 to datetime, and it will do a mass conversion. You do not n...

What is the best way to turn a time vector into something plottable when you have large quantities of data?

filter the entire data by p1 and p2 giving you 6 columns. pass the 6 to datetime, and it will do a mass conversion. You do not n...

16 hours ago | 0

Answered

Can someone explain this loop?

The count starts out 0. Then you start going through the array in linear index order. Each time you find an even number, you inc...

Can someone explain this loop?

The count starts out 0. Then you start going through the array in linear index order. Each time you find an even number, you inc...

16 hours ago | 1

| accepted

Answered

Is there a method to use ‘findpeaks’ to detect bright spots in an otherwise darkimage?

you can post process the findpeaks output but it really does not seem to be worth the effort. https://www.mathworks.com/help/ma...

Is there a method to use ‘findpeaks’ to detect bright spots in an otherwise darkimage?

you can post process the findpeaks output but it really does not seem to be worth the effort. https://www.mathworks.com/help/ma...

1 day ago | 0

| accepted

Answered

convert an array of 0s and 1s to binary & reverse

pad with 0 to a multiple of 8 2.^(7:-1:0) * reshape(padded, 8,[]) The result will be a vector of values 0 to 255 reve...

convert an array of 0s and 1s to binary & reverse

pad with 0 to a multiple of 8 2.^(7:-1:0) * reshape(padded, 8,[]) The result will be a vector of values 0 to 255 reve...

1 day ago | 0

Answered

Display data of a particular variable present in a netcdf file

latitude is effectively "plaid" -- there are 50 columns and 50 different latitudes (to within round-off). But you cannot just us...

Display data of a particular variable present in a netcdf file

latitude is effectively "plaid" -- there are 50 columns and 50 different latitudes (to within round-off). But you cannot just us...

1 day ago | 1

| accepted

Answered

Is possible select specific rows with all column in a loop?

mask = ismembertol(YourArray, 1:6); selected_rows = YourArray(mask,:); G = round(selected_rows(:,1)); split_groups = splitapp...

Is possible select specific rows with all column in a loop?

mask = ismembertol(YourArray, 1:6); selected_rows = YourArray(mask,:); G = round(selected_rows(:,1)); split_groups = splitapp...

1 day ago | 0

Answered

From plot to video

See getframe() https://www.mathworks.com/help/matlab/ref/getframe.html and videowriter() https://www.mathworks.com/help/matlab/r...

From plot to video

See getframe() https://www.mathworks.com/help/matlab/ref/getframe.html and videowriter() https://www.mathworks.com/help/matlab/r...

2 days ago | 0

Answered

Some Errors I couldn't fix (gui)

You can go in and edit the callbacks using GUIDE... but the easier solution is to add these to the bottom of the code: function...

Some Errors I couldn't fix (gui)

You can go in and edit the callbacks using GUIDE... but the easier solution is to add these to the bottom of the code: function...

2 days ago | 0

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Answered

how to integrate the function?

syms theta t__c t_prime x v__x y omega t part1 = 1/(1+2*t_prime/t__c) part2 = exp(-2*((x-v__x*t_prime).^2 + y.^2)/((1+2*t_prim...

how to integrate the function?

syms theta t__c t_prime x v__x y omega t part1 = 1/(1+2*t_prime/t__c) part2 = exp(-2*((x-v__x*t_prime).^2 + y.^2)/((1+2*t_prim...

2 days ago | 0

Answered

How do I stop the calculation in a for loop?

The division by 50 is just to make the output shorter for this demonstration. format long g n = 4; v = rand(n,2) / 50; for f...

How do I stop the calculation in a for loop?

The division by 50 is just to make the output shorter for this demonstration. format long g n = 4; v = rand(n,2) / 50; for f...

2 days ago | 0

| accepted

Answered

how can I buy license Matlab and Simulink From Viet Nam?

You cannot choose the version for Student licenses; you can only purchase the latest version. In Viet Nam, Mathworks operates t...

how can I buy license Matlab and Simulink From Viet Nam?

You cannot choose the version for Student licenses; you can only purchase the latest version. In Viet Nam, Mathworks operates t...

2 days ago | 0

| accepted

Answered

How to gradually plot two simultaneous graphs in MATLAB gui?

a = 0:0.01:1; x = sin(2*pi*3*a); y = cos(2*pi*a); fig1 = figure(1); ax1 = axes(fig1); fig2 = figure(2); ax2 = axes(fig2)...

How to gradually plot two simultaneous graphs in MATLAB gui?

a = 0:0.01:1; x = sin(2*pi*3*a); y = cos(2*pi*a); fig1 = figure(1); ax1 = axes(fig1); fig2 = figure(2); ax2 = axes(fig2)...

2 days ago | 0

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Answered

Merge Variables in Table

names = YourTable.Properties.VariableNames; initials = extractBefore(names, 2); [G, id] = findgroups(initials); newTable = ta...

Merge Variables in Table

names = YourTable.Properties.VariableNames; initials = extractBefore(names, 2); [G, id] = findgroups(initials); newTable = ta...

2 days ago | 1

| accepted

Answered

Double sumation of mathmatical equation

What is the ? It looks like a function or integration or something like that. I recommend that you reverse the order of summat...

Double sumation of mathmatical equation

What is the ? It looks like a function or integration or something like that. I recommend that you reverse the order of summat...

2 days ago | 0

Answered

Confusion about specifiers and output

When I open the cell, it shows the output with 4 decimal places That does not mean that the decimal places are not stored -- it...

Confusion about specifiers and output

When I open the cell, it shows the output with 4 decimal places That does not mean that the decimal places are not stored -- it...

2 days ago | 0

Answered

how to plot a graph gradually?

a = 0:0.1:10; x = sin(2*pi*3*a); for i = 1:length(a) plot(a(1:i),x(1:i)) pause(1) end However I recommend that you...

how to plot a graph gradually?

a = 0:0.1:10; x = sin(2*pi*3*a); for i = 1:length(a) plot(a(1:i),x(1:i)) pause(1) end However I recommend that you...

2 days ago | 0

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Answered

Does Macbook Air M1 is well-oprimized MATLAB?

The reports I am seeing is that it is already decently fast even in emulation, and is expected to get faster as more of it goes ...

Does Macbook Air M1 is well-oprimized MATLAB?

The reports I am seeing is that it is already decently fast even in emulation, and is expected to get faster as more of it goes ...

2 days ago | 1

Answered

Iterating Through Multiple Structures in One Structure

A = struct(); for K = 1 : 4 ts = struct('pqr', randi(9, 1, 3), 'stu', randi(9, 1, 3)) n = char(randi(0+['a', 'z'], 1, 5...

Iterating Through Multiple Structures in One Structure

A = struct(); for K = 1 : 4 ts = struct('pqr', randi(9, 1, 3), 'stu', randi(9, 1, 3)) n = char(randi(0+['a', 'z'], 1, 5...

2 days ago | 0

| accepted

Answered

Create a vector in 15-minute intervals (from 0 am to 24 pm)

Sure, you can xticks() with datetime objects if you have a datetime ruler. The problem is being able to read it. Every 15 minu...

Create a vector in 15-minute intervals (from 0 am to 24 pm)

Sure, you can xticks() with datetime objects if you have a datetime ruler. The problem is being able to read it. Every 15 minu...

2 days ago | 0

Answered

generate square wave using piecewise function and plot it

PulseLength = 50; CycleLength = 1000; ReduceCycle = @(x) x - CycleLength*floor(x/CycleLength) syms t y(t) = piecewise( Reduc...

generate square wave using piecewise function and plot it

PulseLength = 50; CycleLength = 1000; ReduceCycle = @(x) x - CycleLength*floor(x/CycleLength) syms t y(t) = piecewise( Reduc...

3 days ago | 0

Answered

What is the Best Way to Deal with an Empty Line Object?

i1 = x<=3; i2 = x > 100; i3 = x >= 7; plot(x(i1),y(i1),'r',x(i2),y(i2),'b',x(i3),y(i3),'g'); hold on hlines = plot(nan,nan...

What is the Best Way to Deal with an Empty Line Object?

i1 = x<=3; i2 = x > 100; i3 = x >= 7; plot(x(i1),y(i1),'r',x(i2),y(i2),'b',x(i3),y(i3),'g'); hold on hlines = plot(nan,nan...

3 days ago | 0

| accepted

Answered

use gpu for image processing

generateParams(image, param_one); % saves results in image1_result.mat % create corresponding database for the ...

use gpu for image processing

generateParams(image, param_one); % saves results in image1_result.mat % create corresponding database for the ...

3 days ago | 0

Answered

Replace a variable in differential equation with 0

syms T(t) SigmaT(t) BetaV(t) Lemda To ode = diff(T,t) == ((Lemda-((SigmaT(t)).*T))-BetaV(t).*T(t)) cond = T(0) == To; zerofun...

Replace a variable in differential equation with 0

syms T(t) SigmaT(t) BetaV(t) Lemda To ode = diff(T,t) == ((Lemda-((SigmaT(t)).*T))-BetaV(t).*T(t)) cond = T(0) == To; zerofun...

3 days ago | 0

| accepted

Answered

Replacing Variable in an ODE

syms T(t) Lemda Sigma To ode = diff(T,t) == (Lemda-(Sigma.*T)); cond = T(0) == To; Solution = dsolve(ode, cond)

Replacing Variable in an ODE

syms T(t) Lemda Sigma To ode = diff(T,t) == (Lemda-(Sigma.*T)); cond = T(0) == To; Solution = dsolve(ode, cond)

3 days ago | 0

| accepted