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**Content Feed**

Speed Up the for loop

A couple of suggestions: 0, check the time spent on different lines by running this script with smaller limits on j and i with ...

4 dagen ago | 1

Principal component regression, keeping variable names

Well the eigen-vectors will correspond to some linear combinations of your orignal variables. As such one eigenvector might for ...

4 dagen ago | 1

Solving coupled differential equations.

The first trick to try with these coupled integro-differential equations is to try to "differentiate away the integrals": whi...

5 dagen ago | 0

How can I obtain the Fourier Transformation as a product of matrices?

Have a look at the help and documentation for dftmtx. That function should return the discrete Fourier-transform matrix and give...

5 dagen ago | 0

Solving non linear equation "Circle" equations

If the 20 equations are of the same form you will have a vastly overdetermined problem (that in general will not have any exact ...

5 dagen ago | 0

How can we plot the correlation

It seems that you ask for the corrcoef. If you look at the correlation between 2 signals you will simly get a 2-by-2 matrix whic...

6 dagen ago | 0

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how to solve a non linear ode equation ?

You have a quadratic equation for dCAdt, solve that one as a standard quadratic equation, you will end up with two solutions for...

6 dagen ago | 0

Implementing Runge kutta method in place of ode45

You simply take the RK-scheme that suits your preferences and needs, for example from: Runge-Kutta methods, and plug that into a...

6 dagen ago | 0

Can Ode 45 solve piecewise function in the iteration？

Your best approach is to use the events-handling procedure to interupt and restart the ode-integration whenever x and y passes t...

7 dagen ago | 0

Many 2D histograms, single colorbar

For that type of equalization I do someething like this: for i1 = 1:4 numberPairs(i1).matrix = randn(1000,2); subplot (2,...

12 dagen ago | 0

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Find centroid of curve

Something like this ought to work: [~,iEnd] = max(spline_pts(1,:)); [~,iStart] = max(spline_pts(2,:)); R1 = spline_pts(:,iS...

12 dagen ago | 0

Generate random number between -Inf and 0.5

Since the cummulative-distribution-function of the random-number-distribution has to be one at +infinity, you need to have some ...

12 dagen ago | 0

| accepted

Early exit instead of a warning in ODE113?

The brute-forciest way to do this might be to give ode113 an event that interrupts after some suitably long time, i.e. long enou...

14 dagen ago | 0

| accepted

Efficient ODE with function handles

If the function-handle-argument is too costly and you still want "some general flexibility" you might try to simply extend the O...

17 dagen ago | 1

How to specify the color of this contourf plot?

Maybe you can avoid the problem by using fill or patch by extracting the coordinates of the perimeters of the landmask? Somethi...

17 dagen ago | 0

| accepted

Multidimensional lookup table using griddedInterpolant

If you calculate all the combinations of points you dont need to go over the allcomb way, you could just as well run ndgrid at o...

17 dagen ago | 0

How to solve this Projectile Motion Problem

You write down the equation of motion: taking into account as many physical effects as necessary (gravity, drag) to get a sol...

18 dagen ago | 0

Interpolation of circular data

To my understanding simply extend the input arrays such that you have a couple of points from the first few samples added onto t...

19 dagen ago | 1

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How to enter and define a function with the value of one input form the order of matrix for another input

If you need a function with a bit more complexity than "a one-liner" simply write it as an m-function file. Then you can do pret...

19 dagen ago | 0

How can I plot a straight line from a curve?

To plot a line between a point [x_i,y_i] and [0,0] simply do this: ph0p = plot([0,x_i],[0,y_i]); Then you can decorate the lin...

19 dagen ago | 0

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For inbuilt solvers ODE23/DDE23, how to keep saving/output all solution values intermediately (eg: every 1 hour, save/output the solution instead of only after reaching tf)

You could request output for a selected set of points in time instead of only setting the time-span: t_all = [0:1:500]; [t_out...

20 dagen ago | 0

How can I add single vertical data cursor for all subplots ?

If you search on the file exchange you will find vertical-line FEX search-results, at a first glance at least the 4th and 6th su...

20 dagen ago | 0

How can i solve this optimization problem?

Best route might be to properly differentiate J with respect to delta_Uk and solve the normal equations and find an analytical s...

20 dagen ago | 2

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Solving system of ODE's contains complex equations

The way it looks to me you have a problem something like this: One problem is that the B-matrix you've given is singular whic...

20 dagen ago | 0

Scattered point clouds for pairs of arays

Have a look at the help and documentation for scatter. If you have very many points you might consider using histogram to get an...

25 dagen ago | 1

Fit using nlinfit with uncertainties on x and y accounted for in the fit

Have a look at the total least squares tools on the file exchange: total-least-squares-with-mixed-and-or-weighted-disturbances a...

26 dagen ago | 1

Best Descriptor for goodness of fit

The best descriptor for goodness of fit is some measure of the divergence between the distribution of residuals of your fit and ...

27 dagen ago | 0

| accepted

How to plot a contour diagram?

You should be able to do that with pcolor-in-polar-coordinates. Perhaps you might need to lightly modify the function to exactly...

28 dagen ago | 0

| accepted

Creating a vector from a set of coordinates

If you do: r = [x(:),y(:)]; % (:) forms column-vectors of any-dimensional array. Then you will find: p1 = r(1,:) HTH

ongeveer een maand ago | 0

| accepted

legend color does match with drawn lines?

When you want proper control of what is shown in legends always use the graphics-handles returned by the plotting-functions: fi...

ongeveer een maand ago | 0

| accepted