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editing the JET colormap
You should be able to do something like this: imagesc(peaks(123)) cx = caxis; n_colors = 128 cmp = jet(n_colors); colorbar ...

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How can I check that a newly generated sequence is already in the existing structure list or not?
For example this can be used: intersect([1 2 3;1 3 2;2 1 3;2 3 1;3 1 2],[3 2 1],'rows') % %ans = % % 0x3 empty double matr...

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2d interpolation from a non-uniform grid
No you can use griddata and scatteredInterpolant. You can do something like this: Zi = griddata(X(:),Y(:),Z(:),Xi,Yi); And you...

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How could I use MATLAB to solve for x with this equation, 0=a*x^(3)+b*x^(-1)+c.
This works perfectly fine: f = @(x ) -58.8*(550) + 0.5*37*0.002377*x.^3.*(0.02+0.062*((2*960)./(0.002377*37*x.^2)).^2); plo...

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Please help me convert them into a function of theta
When you get such an error, your first action would be to look at the sizes of the variables you use: whos r wab L r theta Nex...

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ODE 45 range for the variables
If you want to start your ode-integration at an [x,T]-point of [0,298] you have to define your y0 like this: y0=[0 ; 298]; %ini...

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Matrix product and inversion speed up
My comment still seems relevant. A simple commandline test gives: tic,AA = ones(3e4,2)*(ones(2,3e4)*ones(3e4,1));toc % Elapsed...

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Getting an unknown error on calculating Standard Deviation.
Your variable v is a uint8. Try: std(double(v)) HTH

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Evaluate the triple integral and sketch the given solid
Whenever you are faced with a problem to solve start trying to solve it with the methods at hand. 1, You surely know how to do ...

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How to make a double integration with numerical integration?
Why not use integral2 to integrate over 2-D domains - it can handle, at least, boundaries in the y-direction that are functions ...

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How to show a deformation of a sphere
Keep track of the x, y, and z-lims or the axis-limits. Something like this: tiledlayout(1,2); [X, Y, Z] = ellipsoid(0,0,0,1,1,...

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ODE system with variable parameter, Boundary conditions and domain
This could be done something like this: Dall = {0:0.1:1,0:0.1:2}; % however many domains you need etc Y0 = {[Tt01;Pt01;M01],[T...

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Integrate PDEPE solution wrt x
This rather straightforward method should get the job done (assuming you cannot get away with simply use trapz, or cumtrapz, but...

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How to calculate |x|
abs(x) When you look for functions you should learn about the matlab-command lookfor, have a look at the help and documentation...

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Curve fitting of two different datasets with two different equations and parameters to compare
This is why I never use the fancy curve-fitting-gui-tool, but do it explicitly with fminsearch or lsqnonlin. That way I have mor...

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How to solve exponential distribution equation using symbolic Matlab?
It helps the int if you explicitly tells what the range to integrate over is: int(f,0,inf) HTH

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Sturm-Liouville eigenvalues calculation
Have you checked the file-exchange contribution: discrete-orthogonal-polynomial. It solves this kind of problems numerically.

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common tangent of two curves with vpasolve.
In your code you gove starting-points for the variable you search for. Perhaps vpasolve doesn't bother to look for all solutions...

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How to add arrows in plotted curves to point corresponding axis?
There are a number of arrow-contributions on the file exchange. These two are my favourites: arrow3, arrow, other contributions ...

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How to use wiener filter?
If you read the help for deconwnr you see that there is a third input, NSR, for the image Noise-to-Signal-Ratio. Since the Wiene...

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Simulating lens tilt on image
OK, here's a two thirds (some reasonable-fraction) solution that computationally is not too shabby. In its current version it al...

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how to remove speckles from image?
Well the filtering you want to achieve is to keep structures with smaller spatial scales that have some magnitude above the spec...

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how to plot different markers in scatter plot
This seems to work: scatter(randn(9,1),randn(9,1),32,rand(9,1),'filled','d') For markers of your choise - you know better than...

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How can I increase the vertical size of subplots?
You can manually adjust the subplot's axes position like this: sph = subplot(3,2,1); dx0 = 0; dy0 = -0.05; dwithx = 0.0; dw...

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average filter in Matlab
Why not use imfilter (if you have the image-processing toolbox) or conv2 - both should do this task in one line. To your proble...

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Treatment G-code file
Maybe the easiest way it to loop through the text line-by-line and check if it contains the character 'Z' using strfind or finds...

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scatter plot with color gradient on y-values
That should be as easy as: scatter(data(1, :), data(2, :), 10, data(2,:), 'filled'); You can modify the scaling of the colour-...

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how to remove speckles from image?
If your solution is not to use a large apperture (Why? The example you've shown us seems to work for the large apperture.) then ...

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how to plot cumulative normal distribution of matlab
If you have the statistics toolbox you have direct access to the cummulative distribution of a number of pdfs. Try to look at th...

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Plot trajectories of coupled nonlinear oscillator
Have a look at the search-results for: coupled nonlinear oscillator HTH

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