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Better “centerpoint” than centroid of a concave polygon
Here is the simplest solution for this task x = rand(4,1); y = rand(4,1); x = [x; x(1)]; y = [y; y(1)]; ii = 2; % corne...

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readmatrix produces NaN values after parsing a .txt file
See this solution I don't have readmatrix. I tried importdata A = importdata('matrixA.txt'); data = A.data; find( isnan(data...

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Solve Finite Element Analysis equation
Here are some of my thoughts

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Solve set of inequalities
Here is what i invented clc,clear cla A = -203; B = 12189; DAC05 = 206; DAC45 = 1864; gamma = 2; c0 = linspace(-1e3,1e...

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Plotting Solution for Different Times: Hyperbolic PDE
I used this difference scheme results Do you have a picture of expected result?

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Draw triangle on 3d mesh
What about this? function main opengl software h = surf(sphere(20)); axis vis3d set([h gcf],'hittest','off') % не зн...

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how to fix the brightness of a series of 3d isosurface images
It's cause by these Example [x,y,z,v] = flow; isosurface(x,y,z,v,-3); isosurface(x,y,z,v,-1); caxis([-4 0]) view(3) axi...

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finding coordinate based on distances
Here is an idea Red numbers are distances as following Black numbers are number of points Tell me what do you think

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Split Volume Along 2D Surface
See this madness clc,clear [x1,y1,z1] = meshgrid(1:10); % volume boundaries [x2,y2] = meshgrid(1:0.5:10); % su...

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Collecting and rearranging excel data
Try this clc,clear A = [] [s1,info1] = xlsfinfo('Season 2017.xls'); for i = 1:numel(info1) A1 = readtable('Season 201...

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Generate a mesh with unequal steps based on a density function
What about this? x = (0:.02:2)'; y = 5*sin(2*pi*x).*x; t = [0; cumsum(hypot(diff(x),diff(y)))]; t1 = linspace(t(1),t(end))...

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First time using imagesc and it seems to be completely changing my plot? Help!
You Fxy matrix should be 2D. No for loop is needed [x,y] = pol2cart(angle,radius); [Fxy,~] = mehsgrid(F,radius); imagesc(x,y,...

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Why is ODE15s ignoring my boundary conditions?
I rewrote your equations as following I used this difference scheme And here is the success i reached

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Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
I found the solution

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How to link subgroup data points together in a plot?
What about this? hold on A1 = unique(A(:,1)); cmark = {'o' '*' '.'}; for i = 1:numel(A1) ix = A(:,1)==A1(i); h(i) ...

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Finding maximum axial slice location from 3D binary label
Use find to find all values Use ind2sub to convert indices to i,j,k (x,y,z) ix = find(V(:)); % find nonzero...

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How to add Joint PDF Density Contour?
What about this witty trick? load seamount n = 20; x1 = (x-min(x))/(max(x)-min(x))*(n-1)+1; y1 = (y-min(y))/(max(y)-min(y)...

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Optimise creation of matern 3/2 covariance matrix
Try this [X,Y] = meshgrid(1:n); K = (1+sqrt(3)*abs(X-Y)/tau).*exp(-sqrt(3)*abs(X-Y)/tau); K = (K>1e-9).*K; read this

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Text in front of the mesh in 3D figure plot
What about this? clc,clear x = rand(1,100); y = rand(1,100); z = rand(1,100); x0 = mean(x); y0 = mean(y); x1 = x-x0; y...

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finding dense location and define centeriod of the each dense location
Here is simple but coarse (maybe not precise method) Fill matrix Connect pixels Thin l...

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High Performance Interpolation of 3D grid data
Here is an example. It's just a surface in 3D. I rotated X and Y and found new Z See script and try to calculate value of point...

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projectile motion in matlab
See this clc,clear a = 60; v = 10; x = 0; y = 0; vx = v*cosd(a); vy = v*sind(a); g = 9.81; dt = 0.02; % plot([5 5],[...

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split matrix into multiple matrices with variable number of rows according to value of a column
Here is how i see the solution S = importdata('Bspectrumgloei.xlsx'); A = S.data; ind = [ 20 54 78 98 132 ]; A1 = cell(5,1);...

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Intercept of two polynomial of degree 2 graphs
Try this (not tested)

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Plot the graphs of the following parametric equations using ezplot
See this madness syms r t r = sin(t/2); x = r*cos(t); y = r*sin(t); ezplot(x,y,[0 2*pi])

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How to use the mean colour of each segment of an image and display it in segmentation
Can you label each region maybe with bwlabel? Then you can just loop through each region % let 'I' be your color image [L,n] ...

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find() returns content of {1×0 double} cell array
What about simple for loops? ffile = {'\\path\143' '\\path\204' '\\path\450'}; RAW = {'450' '143'}; allind = zeros(size(RAW)...

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How to get the position of nodes (x and y coordinates) stored in a logical array?
You can use get if it's a handler (variable that represent an object (plot or somerthing)) CPP is array of logical type CPP(r,...

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How to plot a curve using angles?
Try cumsum ds = rand(1,10); % length of each segment a = rand(1,10)*90; % angle of each segment dx = sind(a).*d...

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using shooting method for coupled ode
Thank you more readable code Here are some mistakes Some note: Shouldn't last equations be like this? What is g? Ther...

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