Risposto

Solving a differential equation

According to your description you don't have a differential equation if you have the values of C and the known dependent values ...

Solving a differential equation

According to your description you don't have a differential equation if you have the values of C and the known dependent values ...

2 mesi fa | 0

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Risposto

How to convert XYZ coordinate into nodes (like Xi, Yj) on the grid curve surface?

Are you looking for something like this: xy2sn? HTH

How to convert XYZ coordinate into nodes (like Xi, Yj) on the grid curve surface?

Are you looking for something like this: xy2sn? HTH

2 mesi fa | 0

Risposto

Deconvolution of experimental peaks

Have a look at the help and documentation of deconvblind. If you make sure that the curve you want to deconvolve and the point-s...

Deconvolution of experimental peaks

Have a look at the help and documentation of deconvblind. If you make sure that the curve you want to deconvolve and the point-s...

2 mesi fa | 0

Risposto

how to make curved arrow

There are a number of submissions on the File Exchange that helps you with this: circular-arrow-around-vector, circular_arrow, ...

how to make curved arrow

There are a number of submissions on the File Exchange that helps you with this: circular-arrow-around-vector, circular_arrow, ...

2 mesi fa | 0

Risposto

How to get the numerical rank of the matrix in matlab?

If you can afford it you might consider looking at the singular vaules that you obtain from the svd of your A-matrix. That will ...

How to get the numerical rank of the matrix in matlab?

If you can afford it you might consider looking at the singular vaules that you obtain from the svd of your A-matrix. That will ...

2 mesi fa | 0

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Risposto

Is there a way to export the results of PDE's solution to the gradient？Or the gradient can be calculated from the exported triangular node result？

You should have access to the pdegrad-function that should handle your case. Or if that doesn't suit your particular need some o...

Is there a way to export the results of PDE's solution to the gradient？Or the gradient can be calculated from the exported triangular node result？

You should have access to the pdegrad-function that should handle your case. Or if that doesn't suit your particular need some o...

3 mesi fa | 1

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Risposto

Summing and multiplying matrices of different size

Check that you get what you expect from each product and term separately. Then figure out what you should do to fix your discrep...

Summing and multiplying matrices of different size

Check that you get what you expect from each product and term separately. Then figure out what you should do to fix your discrep...

3 mesi fa | 0

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Risposto

Unexpected phase delay via cross-correlation ? Method issue or bad data?

The phase-jump is just the branch-cut of angle (or atan2). As a measure of phase-shift between 2 harmonic signals it is equivale...

Unexpected phase delay via cross-correlation ? Method issue or bad data?

The phase-jump is just the branch-cut of angle (or atan2). As a measure of phase-shift between 2 harmonic signals it is equivale...

3 mesi fa | 0

Risposto

How do I plot a Poincare plot for a non-autonomous ODE's?

This sound like a perfect example of when one should use the events capabilities of the ODE-solvers. If you look at the code of ...

How do I plot a Poincare plot for a non-autonomous ODE's?

This sound like a perfect example of when one should use the events capabilities of the ODE-solvers. If you look at the code of ...

3 mesi fa | 0

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Risposto

How to get average of data using different time range?

QD-suggestion (from someone too lazy/stupid/old/stubborn to learn to use arrayfun): Temperature = randi([-20 40], 24*365, 1); %...

How to get average of data using different time range?

QD-suggestion (from someone too lazy/stupid/old/stubborn to learn to use arrayfun): Temperature = randi([-20 40], 24*365, 1); %...

3 mesi fa | 0

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Risposto

Parse 1 large column of uneven data into an array of columns by nth rows.

If your file contains an equal number of samples for every "loop" and the files contains data from full "loops". Then something ...

Parse 1 large column of uneven data into an array of columns by nth rows.

If your file contains an equal number of samples for every "loop" and the files contains data from full "loops". Then something ...

3 mesi fa | 0

Risposto

Grid colormap with colorized circles

Something like this shouldn't be too complicated to cook up. Perhaps this is a start: function h = cwheel(x0,y0,phi0,r,nspokes)...

Grid colormap with colorized circles

Something like this shouldn't be too complicated to cook up. Perhaps this is a start: function h = cwheel(x0,y0,phi0,r,nspokes)...

3 mesi fa | 1

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Risposto

Reconstructing a surface from mesh points and function values (from COMSOL)

Are you sure that you need to use scatteredInterpolant at all? The points in the first plot seem to be on a regular grid. If tha...

Reconstructing a surface from mesh points and function values (from COMSOL)

Are you sure that you need to use scatteredInterpolant at all? The points in the first plot seem to be on a regular grid. If tha...

3 mesi fa | 0

Risposto

Unable to find explicit solution

This looks like an attempt to derive and solve equations of motion with Euler-Lagrange equations. If that's the case there are t...

Unable to find explicit solution

This looks like an attempt to derive and solve equations of motion with Euler-Lagrange equations. If that's the case there are t...

3 mesi fa | 0

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Risposto

Unable to understand how to use the function given on the site below

files with the extension .gz are typically compressed with gzip, that use the Lempel-Ziv coding. The most effective way to handl...

Unable to understand how to use the function given on the site below

files with the extension .gz are typically compressed with gzip, that use the Lempel-Ziv coding. The most effective way to handl...

3 mesi fa | 0

Risposto

How to implement this kind of coding ?

You while-loop will continue as long as the test-condition is true. You want to continue "a couple" of iterations after your des...

How to implement this kind of coding ?

You while-loop will continue as long as the test-condition is true. You want to continue "a couple" of iterations after your des...

3 mesi fa | 0

Risposto

Converting multiple lines into separate equations from jpeg?

In similar situations I typically separate the problem into two steps, first extracting the curves, then fit parameters for equa...

Converting multiple lines into separate equations from jpeg?

In similar situations I typically separate the problem into two steps, first extracting the curves, then fit parameters for equa...

3 mesi fa | 1

Risposto

How can I transform this curved wall to a flat wall without any distortions in the image? Is there any code available for it?

Sure thing. First assume that all bricks are flat bricks of exactly the same size. Then identify the edges of each brick in the ...

How can I transform this curved wall to a flat wall without any distortions in the image? Is there any code available for it?

Sure thing. First assume that all bricks are flat bricks of exactly the same size. Then identify the edges of each brick in the ...

3 mesi fa | 0

Risposto

griddata vs griddedinterpolant vs scatteredInterpolant for given data

griddedinterpolant expects points on a regular grid pretty much like interp2 - so that function seems unsuitable for your case. ...

griddata vs griddedinterpolant vs scatteredInterpolant for given data

griddedinterpolant expects points on a regular grid pretty much like interp2 - so that function seems unsuitable for your case. ...

3 mesi fa | 1

Risposto

pcolor LOOP of current speed and a map of the area.

If you take care of the handle you get from pcolor you should be able to do something like this: H = pcolor(...) % Initial pl...

pcolor LOOP of current speed and a map of the area.

If you take care of the handle you get from pcolor you should be able to do something like this: H = pcolor(...) % Initial pl...

3 mesi fa | 0

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Risposto

Optimise vertical position of nodes for shortest sum of paths

If this is a one-off calculation just brute-force search shouldn't be too bad, the y-position of the nodes should be within a sm...

Optimise vertical position of nodes for shortest sum of paths

If this is a one-off calculation just brute-force search shouldn't be too bad, the y-position of the nodes should be within a sm...

3 mesi fa | 1

Risposto

Installation on Ubuntu 22.04 LTS finished but there is no Matlab

To me this sounds like you forgot to create a link to the executable from a directory on your path. Here's how I check where I h...

Installation on Ubuntu 22.04 LTS finished but there is no Matlab

To me this sounds like you forgot to create a link to the executable from a directory on your path. Here's how I check where I h...

3 mesi fa | 1

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Risposto

Diffraction pattern of plane wave through Circular Aperture

Your first problem is surely that all your variables are 1-D arrays and it seems you still only model some kind of linear apertu...

Diffraction pattern of plane wave through Circular Aperture

Your first problem is surely that all your variables are 1-D arrays and it seems you still only model some kind of linear apertu...

3 mesi fa | 0

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Risposto

Remove specific contours or make them invisible

The easiest way is to continue with the algorithm where you save the level-2-contours with a level one contour inside. Then you ...

Remove specific contours or make them invisible

The easiest way is to continue with the algorithm where you save the level-2-contours with a level one contour inside. Then you ...

3 mesi fa | 0

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Risposto

Find two contours at different levels around the same peak

You could (QD algorithming-from-the-hip) use the contour-coordinates in c1 and c2. Typically I find it easiest to break them con...

Find two contours at different levels around the same peak

You could (QD algorithming-from-the-hip) use the contour-coordinates in c1 and c2. Typically I find it easiest to break them con...

3 mesi fa | 0

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Risposto

How to set the name with num2str in for loop?

Perhaps it is as simple as: for k = 1:1000 % assign the content of the file directly to variable A: A = load(['cp_',n...

How to set the name with num2str in for loop?

Perhaps it is as simple as: for k = 1:1000 % assign the content of the file directly to variable A: A = load(['cp_',n...

3 mesi fa | 0

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Risposto

Errorbar plot in colormap

You might get away with putting the errorbar-call in a loop. Perhaps something like this: figure(); clf box on hold on cmp ...

Errorbar plot in colormap

You might get away with putting the errorbar-call in a loop. Perhaps something like this: figure(); clf box on hold on cmp ...

3 mesi fa | 0

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Risposto

What is the Fourier Series Coefficient of F=exp(sin(x))?

Might I be so bold as to suggest (physicist writing about calculus here...) that this task ought to have some clever analytical ...

What is the Fourier Series Coefficient of F=exp(sin(x))?

Might I be so bold as to suggest (physicist writing about calculus here...) that this task ought to have some clever analytical ...

3 mesi fa | 0

Risposto

How to use ode45 efficiently on a large input vector

If the ODE-system you're trying to solve is something like a set of independend equations of motion that only couple "pairwise" ...

How to use ode45 efficiently on a large input vector

If the ODE-system you're trying to solve is something like a set of independend equations of motion that only couple "pairwise" ...

3 mesi fa | 1

Risposto

for loop, in irregular numbers clusters?

You will have these lists of "todos" and "not-todos" from somewhere outside, since, as you write, you can't type down all the nu...

for loop, in irregular numbers clusters?

You will have these lists of "todos" and "not-todos" from somewhere outside, since, as you write, you can't type down all the nu...

3 mesi fa | 0

| accettato