Answered

How to find angle between two lines?

A more stable method that what Jos suggested is v_1 = [x2,y2,0] - [x1,y1,0]; v_2 = [x3,y3,0] - [x1,y1,0]; Theta = atan2(norm(...

How to find angle between two lines?

A more stable method that what Jos suggested is v_1 = [x2,y2,0] - [x1,y1,0]; v_2 = [x3,y3,0] - [x1,y1,0]; Theta = atan2(norm(...

6 hours ago | 0

Answered

Integrating function of t over numerical values

Yes, that means that the function you call integral with is called with an array of values - therefore your function (the long e...

Integrating function of t over numerical values

Yes, that means that the function you call integral with is called with an array of values - therefore your function (the long e...

11 hours ago | 0

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Answered

Multiple color plots / colorbars on a single axes

There are some contributions on the file exchange that deals with this. I thik this is one: colormat-and-colorbar-utilities You...

Multiple color plots / colorbars on a single axes

There are some contributions on the file exchange that deals with this. I thik this is one: colormat-and-colorbar-utilities You...

3 days ago | 0

| accepted

Answered

Given 2 red beads, 2 blue beads, 1 yellow bead, and 1 green bead, how many different necklaces can be made?

Why not just remove the non-unique necklaces? See the help and documentation for unique for how to do this. HTH

Given 2 red beads, 2 blue beads, 1 yellow bead, and 1 green bead, how many different necklaces can be made?

Why not just remove the non-unique necklaces? See the help and documentation for unique for how to do this. HTH

3 days ago | 0

Answered

stream lines for discrete data set of velocities

Your question is a bit too vague. Or rather, the input-data you have is a bit vaguely described. The answer depends on how you'l...

stream lines for discrete data set of velocities

Your question is a bit too vague. Or rather, the input-data you have is a bit vaguely described. The answer depends on how you'l...

3 days ago | 0

| accepted

Answered

Is there a way to Un-clip a sine wave?

You can do something like this: sfcn = @(t,pars) pars(1)+pars(2)*sin(pars(3)*t+pars(end)); % sine-like function with offset and...

Is there a way to Un-clip a sine wave?

You can do something like this: sfcn = @(t,pars) pars(1)+pars(2)*sin(pars(3)*t+pars(end)); % sine-like function with offset and...

4 days ago | 0

| accepted

Answered

Plotting graph with variables on x axis

Something like this: y = randn(123,1); x = linspace(0,1,123); plot(x,y) xtstr = {'0','0.2d','0.4d','0.6d','0.8d','1d'}; set...

Plotting graph with variables on x axis

Something like this: y = randn(123,1); x = linspace(0,1,123); plot(x,y) xtstr = {'0','0.2d','0.4d','0.6d','0.8d','1d'}; set...

4 days ago | 0

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Answered

Dynamic model of a bending spring

Start reading up on the topic of beam-theory. Then come back with matlab or ODE/PDE-based questions which are more suitable for ...

Dynamic model of a bending spring

Start reading up on the topic of beam-theory. Then come back with matlab or ODE/PDE-based questions which are more suitable for ...

4 days ago | 0

Answered

How to assign to an already 3d surface a colormap based on a set of values ?

This is how I'd do this: surf(x,y,z,Temps),shading flat This you dont have to view from above. HTH

How to assign to an already 3d surface a colormap based on a set of values ?

This is how I'd do this: surf(x,y,z,Temps),shading flat This you dont have to view from above. HTH

5 days ago | 0

Answered

i want to fill zeros inbetween vector elements

Looks like you should turn to matlab's sparse arrays. Something like this should be a shortest-ish code-snippet to do what you n...

i want to fill zeros inbetween vector elements

Looks like you should turn to matlab's sparse arrays. Something like this should be a shortest-ish code-snippet to do what you n...

5 days ago | 0

Answered

Coherence as a function of time

Have a look at mscohere, and its help and documentation. It should allow you to calculate the coherence. My version resides in t...

Coherence as a function of time

Have a look at mscohere, and its help and documentation. It should allow you to calculate the coherence. My version resides in t...

5 days ago | 0

Answered

Using spectralFlux to plot Flux of a vector

It is not at all clear what you want to do, spectral flux is not a term I've heard before - this might be because I'm ignorant, ...

Using spectralFlux to plot Flux of a vector

It is not at all clear what you want to do, spectral flux is not a term I've heard before - this might be because I'm ignorant, ...

6 days ago | 0

Answered

matrix contain index track

Sure: I = [1, 3, 1, 4; 2, 3, 2, 4]; % Then operate away... But it is very unclear if that is what you really want. Do...

matrix contain index track

Sure: I = [1, 3, 1, 4; 2, 3, 2, 4]; % Then operate away... But it is very unclear if that is what you really want. Do...

11 days ago | 0

Answered

Problems with waitbar sizing

Have a look at this command-line progress-bar version. It is less visually intrusive when working with other stuff while matlab ...

Problems with waitbar sizing

Have a look at this command-line progress-bar version. It is less visually intrusive when working with other stuff while matlab ...

11 days ago | 0

Answered

Histogram with circular bars

I would do something like this: edges = 0:15:360; N_all(1,:) = histcounts(M1,edges);% Put one histogram per row into N_all N_...

Histogram with circular bars

I would do something like this: edges = 0:15:360; N_all(1,:) = histcounts(M1,edges);% Put one histogram per row into N_all N_...

11 days ago | 0

Answered

Unusual arrangement of plot

Seems like you want the plot done with the radii sorted? (plot plots what you feed it, if you have the x-variable unsorted the p...

Unusual arrangement of plot

Seems like you want the plot done with the radii sorted? (plot plots what you feed it, if you have the x-variable unsorted the p...

14 days ago | 1

Answered

How to find the square root fo complex square

What's wrong with: sqrtZ = sqrt(Z); ? Then possibly work out the other root if necessary. HTH

How to find the square root fo complex square

What's wrong with: sqrtZ = sqrt(Z); ? Then possibly work out the other root if necessary. HTH

14 days ago | 0

Answered

Problem implementing finite difference method at edges of periodic functions

What I'd usualy have to do in this situation is to extract the differentiation matrices - just to check that all elements become...

Problem implementing finite difference method at edges of periodic functions

What I'd usualy have to do in this situation is to extract the differentiation matrices - just to check that all elements become...

14 days ago | 0

Answered

What starting point to choose so fsolve always returns a solution when any exists?

This depends on how you have parameterized your surface. For the most general case (curve - circle), where you have a curve para...

What starting point to choose so fsolve always returns a solution when any exists?

This depends on how you have parameterized your surface. For the most general case (curve - circle), where you have a curve para...

17 days ago | 1

Answered

How does MATLAB deal with wanted linear dependencies?

That's not the problem. What you should look at is how "wellconditioned" your model-matrix X is. Look at this example: [x,y] = ...

How does MATLAB deal with wanted linear dependencies?

That's not the problem. What you should look at is how "wellconditioned" your model-matrix X is. Look at this example: [x,y] = ...

18 days ago | 0

Answered

create freehand region of interest

Have a look at ginput (there are a couple of improved/modified versions on the file exchange), that function should give you the...

create freehand region of interest

Have a look at ginput (there are a couple of improved/modified versions on the file exchange), that function should give you the...

18 days ago | 0

Answered

What is the best way to animate a rocket trajectory through matlab?

I would look for some of the arrow-contributions on the file exchange: Arrow3, arrow - and then simply loop over time calculate ...

What is the best way to animate a rocket trajectory through matlab?

I would look for some of the arrow-contributions on the file exchange: Arrow3, arrow - and then simply loop over time calculate ...

19 days ago | 1

Answered

How to make a common color bar?

This is how I do this neatly: subplot(1,1,1) cbh = colorbar_labeled(''); subplot(2,2,3) plot([0 2]) subplot(2,2,2) imagesc...

How to make a common color bar?

This is how I do this neatly: subplot(1,1,1) cbh = colorbar_labeled(''); subplot(2,2,3) plot([0 2]) subplot(2,2,2) imagesc...

19 days ago | 0

| accepted

Answered

Subscript indices must either be real positive integers or logicals. how can i change? thanks!

Matlab uses 1-based indexing to vectors, so your line: i(0) = v0; %initial condition Has to be changed to: i(1) = v0; %initia...

Subscript indices must either be real positive integers or logicals. how can i change? thanks!

Matlab uses 1-based indexing to vectors, so your line: i(0) = v0; %initial condition Has to be changed to: i(1) = v0; %initia...

19 days ago | 0

Answered

finding all local minima of histogram

If you read the help of the hist function you'll find: N = HIST(Y) bins the elements of Y into 10 equally spaced containers...

finding all local minima of histogram

If you read the help of the hist function you'll find: N = HIST(Y) bins the elements of Y into 10 equally spaced containers...

24 days ago | 0

Answered

Cut a matrix after a certain value

Try: rowNum = find(any(Acum1 > 2500,2),1,'first'); % 1440*60= 86400 secondi. è il tempo disponibile nella giornata if isempty(...

Cut a matrix after a certain value

Try: rowNum = find(any(Acum1 > 2500,2),1,'first'); % 1440*60= 86400 secondi. è il tempo disponibile nella giornata if isempty(...

25 days ago | 0

| accepted

Answered

scatteredInterpolant giving unexpected plateaus

When I tried to download the mat-file I get nothing when I try to load it, it seems empty, could you check that the one you actu...

scatteredInterpolant giving unexpected plateaus

When I tried to download the mat-file I get nothing when I try to load it, it seems empty, could you check that the one you actu...

25 days ago | 0

Answered

Visualization of 4D Plot

Perhaps you're asking for something like this: [X,Y,Z] = cylinder(linspace(1,1.5,100),100); % You have to specify your cylinder...

Visualization of 4D Plot

Perhaps you're asking for something like this: [X,Y,Z] = cylinder(linspace(1,1.5,100),100); % You have to specify your cylinder...

25 days ago | 0

| accepted

Answered

Linear least squares overdetermined system

If I understand your problem correct you want to solve a reasonably large number of very small linear systems? In that case you...

Linear least squares overdetermined system

If I understand your problem correct you want to solve a reasonably large number of very small linear systems? In that case you...

26 days ago | 0