Answered

Remove tick marks for axes

An easy way to "fake" this after setting "Box" to "off", as Peng Li suggests, is to make xline and yline. But it wouldn't be dyn...

Remove tick marks for axes

An easy way to "fake" this after setting "Box" to "off", as Peng Li suggests, is to make xline and yline. But it wouldn't be dyn...

1 day ago | 0

| accepted

Answered

How to find the gradient of a parameter which is not direct solution of a function

Determining l1 for a "target Gam4" value appears not to be an optimization problem, but another root-finding problem. It seems t...

How to find the gradient of a parameter which is not direct solution of a function

Determining l1 for a "target Gam4" value appears not to be an optimization problem, but another root-finding problem. It seems t...

3 days ago | 0

Answered

How to use ode15s with a constant that varies by two parameters?

From you description, it sounds like you want to do the average over d-values outside of our ODE solution. But in your code, you...

How to use ode15s with a constant that varies by two parameters?

From you description, it sounds like you want to do the average over d-values outside of our ODE solution. But in your code, you...

3 days ago | 0

Answered

How do I go about plotting points from ODE45 with this?

yes, your odefun looks wrong, it looks like you did not correctly apply matrix algebra to get the separate equations from your m...

How do I go about plotting points from ODE45 with this?

yes, your odefun looks wrong, it looks like you did not correctly apply matrix algebra to get the separate equations from your m...

3 days ago | 0

Answered

How can I use fmincon to solve problems with ODEs

I presume you mean to use r at some specific time, where r(0) (or some other time) is known - a standard 1D ODE. with some in...

How can I use fmincon to solve problems with ODEs

I presume you mean to use r at some specific time, where r(0) (or some other time) is known - a standard 1D ODE. with some in...

4 days ago | 0

Answered

How to get the solution to a GIVEN input VECTOR using ode45 solver

If you're just looking for code to extract some element out of your ode45 solution: tAll = nan(1,length(u_opt)); xAll = nan(4,...

How to get the solution to a GIVEN input VECTOR using ode45 solver

If you're just looking for code to extract some element out of your ode45 solution: tAll = nan(1,length(u_opt)); xAll = nan(4,...

6 days ago | 0

| accepted

Answered

Separating and extracting data using edge detection

since it appears you have the image processing toolbox (access to "edge"), have you looked into "regionprops"? If you're label...

Separating and extracting data using edge detection

since it appears you have the image processing toolbox (access to "edge"), have you looked into "regionprops"? If you're label...

6 days ago | 0

| accepted

Answered

Solution to 2nd order ode containing time varying coeficients using ode45

can you use the code editor functionality to display code? Multiple issues: you don't need to "run" the gglpr9 function...is t...

Solution to 2nd order ode containing time varying coeficients using ode45

can you use the code editor functionality to display code? Multiple issues: you don't need to "run" the gglpr9 function...is t...

6 days ago | 0

Answered

How to amend the names of all variables in all tables in the current workspace

You can still "bandaid" your situation up by reading the named tables in your workspace into the cell array that could have been...

How to amend the names of all variables in all tables in the current workspace

You can still "bandaid" your situation up by reading the named tables in your workspace into the cell array that could have been...

7 days ago | 1

Answered

Parallelized ODE45 solution with 3D spline

Can you just pass the variables spx spy spz to func_xy as additional arguments? q=1.6e-19; m=400*1.6e-27; odeOpts = odeset(...

Parallelized ODE45 solution with 3D spline

Can you just pass the variables spx spy spz to func_xy as additional arguments? q=1.6e-19; m=400*1.6e-27; odeOpts = odeset(...

7 days ago | 0

| accepted

Answered

Given a point, locate 3 point in different 8 directions.

Or since there is a built-in called improfile (with one toolbox or another), you can skip the convolutions for gradients, take t...

Given a point, locate 3 point in different 8 directions.

Or since there is a built-in called improfile (with one toolbox or another), you can skip the convolutions for gradients, take t...

7 days ago | 0

Answered

Given a point, locate 3 point in different 8 directions.

as long as we're guessing at the problem, an approach that would alleviate the need for line scans would be to rotate the source...

Given a point, locate 3 point in different 8 directions.

as long as we're guessing at the problem, an approach that would alleviate the need for line scans would be to rotate the source...

7 days ago | 0

Answered

Flipping the axis starting value of a plot in matlab

Does this do what you want figure(i); dscatter(X,Y); colorbar; hold on set(gca,'YDir','reverse') % <- added this line

Flipping the axis starting value of a plot in matlab

Does this do what you want figure(i); dscatter(X,Y); colorbar; hold on set(gca,'YDir','reverse') % <- added this line

8 days ago | 0

| accepted

Answered

time dependent constant to solve 1st order ODE via ode45

Seems like you just need Tw to be a function of T (of var(1)). function diffeqs= ode_sys(t,var) T=var(1); ...

time dependent constant to solve 1st order ODE via ode45

Seems like you just need Tw to be a function of T (of var(1)). function diffeqs= ode_sys(t,var) T=var(1); ...

11 days ago | 0

| accepted

Answered

How to dynamically define limits forplot from user input in app designer?

Do not use a loop. Use the edit boxes, and use their callback functions to set the axis limits. It sounds like you should take ...

How to dynamically define limits forplot from user input in app designer?

Do not use a loop. Use the edit boxes, and use their callback functions to set the axis limits. It sounds like you should take ...

12 days ago | 0

Answered

How to remove all background noise due to inappropraite lighting from my pre-processed image and get better edge defination??

try smoothing before you apply your edge detector, not after same goes for your power law (gamma correction?) alternatively/al...

How to remove all background noise due to inappropraite lighting from my pre-processed image and get better edge defination??

try smoothing before you apply your edge detector, not after same goes for your power law (gamma correction?) alternatively/al...

14 days ago | 0

| accepted

Answered

Paste Data to Editable Table in AppDesigner UI

when you say you don't want to use xlsread, is it that you don't want to force usage of excel, or you don't want to read files a...

Paste Data to Editable Table in AppDesigner UI

when you say you don't want to use xlsread, is it that you don't want to force usage of excel, or you don't want to read files a...

14 days ago | 0

Answered

How to binary clone a file using fread and fwrite commands

For your application does it make sense to just copy the file using a system command or matlab's coyfile?

How to binary clone a file using fread and fwrite commands

For your application does it make sense to just copy the file using a system command or matlab's coyfile?

16 days ago | 1

Answered

Newton-Raphson Method with Jacobian

In Newton loops you must evaluate your f and j and currently guessed iterate, so your line h = -f(x0(1),x0(2),x0(3))*j(x0(1),x0...

Newton-Raphson Method with Jacobian

In Newton loops you must evaluate your f and j and currently guessed iterate, so your line h = -f(x0(1),x0(2),x0(3))*j(x0(1),x0...

18 days ago | 0

| accepted

Answered

Solving Linear Differential Equations for Path Following ; I am getting difficulties in implementing the coding with variable psi_e, let's say if I want to run it for psi_e going from 0 to pi/2, how can it be done?

To change value of psi_e (make it variable) seems straightforward: make psi_e an input in your odefun, then loop over psi_e: f...

Solving Linear Differential Equations for Path Following ; I am getting difficulties in implementing the coding with variable psi_e, let's say if I want to run it for psi_e going from 0 to pi/2, how can it be done?

To change value of psi_e (make it variable) seems straightforward: make psi_e an input in your odefun, then loop over psi_e: f...

18 days ago | 0

Answered

how to use tensors

this is a bit imprecise, but if you mean "order 2 tensor", it can be represented as a 2D matrix. Order 3 tensor is then 3D matri...

how to use tensors

this is a bit imprecise, but if you mean "order 2 tensor", it can be represented as a 2D matrix. Order 3 tensor is then 3D matri...

24 days ago | 0

Answered

ode45 error rungg- kutta

your error is probably not with the ODE line, but actually running "Simulation", which you are not supplying any arguments to at...

ode45 error rungg- kutta

your error is probably not with the ODE line, but actually running "Simulation", which you are not supplying any arguments to at...

1 month ago | 0

Answered

Solving second order PDE

Does this help: https://www.mathworks.com/help/matlab/ref/pdepe.html I believe that pdepe is available with base matlab. It ap...

Solving second order PDE

Does this help: https://www.mathworks.com/help/matlab/ref/pdepe.html I believe that pdepe is available with base matlab. It ap...

1 month ago | 0

Answered

Saving multiple outputs from ODE45 with different dimensions?

I would use cells...also what's with the dual indexing? options can be defined outside since nothing is changing from iteration ...

Saving multiple outputs from ODE45 with different dimensions?

I would use cells...also what's with the dual indexing? options can be defined outside since nothing is changing from iteration ...

2 months ago | 0

Answered

Increment a class property everytime calling a class method

subclass from the handle class (default is value class), and you can update properties of the instance without explicitly overwr...

Increment a class property everytime calling a class method

subclass from the handle class (default is value class), and you can update properties of the instance without explicitly overwr...

2 months ago | 1

| accepted

Answered

How to plot values with different color with "if statement"

look at the documentation for the "scatter()" command. can you do what you want with that?

How to plot values with different color with "if statement"

look at the documentation for the "scatter()" command. can you do what you want with that?

2 months ago | 0

Answered

App inside app question

If not more than 1 image needs to be displayed at once, maybe just save all the image data internally, have only one axes, and h...

App inside app question

If not more than 1 image needs to be displayed at once, maybe just save all the image data internally, have only one axes, and h...

2 months ago | 1

| accepted

Answered

Selection of data in timetable

Hmm, so the question is about periodic time ranges...there might be a better way, but maybe you can use "isbetween" on an auxili...

Selection of data in timetable

Hmm, so the question is about periodic time ranges...there might be a better way, but maybe you can use "isbetween" on an auxili...

2 months ago | 0

Answered

How can i select cell from table in app designer?

The UITable has a callback for selection https://www.mathworks.com/help/matlab/ref/matlab.ui.control.tableappd-properties.html#...

How can i select cell from table in app designer?

The UITable has a callback for selection https://www.mathworks.com/help/matlab/ref/matlab.ui.control.tableappd-properties.html#...

2 months ago | 0

Answered

Reading data from ASCII file

It would have been helpful to know these things in advance (you hinted at the first, but say it explicitly) Data contains multi...

Reading data from ASCII file

It would have been helpful to know these things in advance (you hinted at the first, but say it explicitly) Data contains multi...

3 months ago | 0