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Import STL file and convert to Matrix
Try stlread to import geometry Use griddata to interpolate data

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Heatmap - how to get the plotted colors
Just scale values %Exp. Data=[0.216745778875956 0.0122005059399983 0.0162673412533310 0.00149830774701733 0.26338905594...

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1 D Unsteady Diffusion Equation by Finite Volume (Fully Implicit) Scheme
Try this simple difference scheme: lam = 0.5; % k*dt/rho/dx^2 n = 20; T = zeros(n); T(1,:) = 200; ...

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hello can you please help I'm getting this errorIndex in position 2 exceeds array bounds (must not exceed 1). Error in BetaNewmark_MDOF (line 21) xd(:,i+1)=xd(:,i)+(1-b)*dt*x
You are trying to access allements that don't exist. Try this % xdd(:,i), xdd(:,i+1) % WRONG xdd(i), xdd(i+1) ...

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Why do I get "Undefined function or variable" error?
I think your main code should be inside function body

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Using Heun's Method but Problem With Increment
I think you should use index (i) everywhere. vh variable has two elements after first iteration You trying to assign two elemen...

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Sorting Excel values into new vector
Try this ind = find(abs(data-255)<0.1); % find all '255' numbers ind(end+1) = numel(data)+1; % add last i...

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How to import geometry from STL without approximation ?
Here is an example. Read more: 2-D Geometry Creation at Command Line t = 0:0.2:2*pi; % make sure the curve ...

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I need to arrange the elements as shown in the figure. Can anyone suggest an algorithm for this arrangement of elements?
Use flipud A = reshape(1:12,[3 4]); A' flipud(A')

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Help to model a phisical problem in Matlab
Why about spline? I placed two points close to each other to manipulate with tangent angle x0 = [0 0 2 3 4 4]; ...

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convert double NaN to string NaN
Try num2str a = {nan 1 nan}; cellfun(@num2str,a,'UniformOutput',0)

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force input in ode
You need to pass F into your ode function. Read more: LINK for i = 1:length(F) [t,y] = ode45(@(t,y)beam_function(t,y,F(i))...

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How could I solve this error?
You are using the same variable as in for loop. That why you have an error

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Finding coordinates in a plot
Use polyxpoly x1 = 0:.1:pi; % first curve y1 = sin(x1); x2 = [0 pi]; % straight line for findinf intersection y...

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how to remove horizontal and vertical lines from image?
Here is an attempt. Use bwlabel then to separate each region and analyze I0 = imread('image.jpeg'); I1 = im2bw(I0,0.2); I2 = ...

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Vectorising piecewise quadratic interpolation function
Here is the vectorized version (not tested) xkj0 = x-x'; xkj0 = xkj0.*eye(size(xkj0)) + eye(size(xkj0)); % make diagonal eleme...

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How to center-align uitable cells which are all numerical values?
Here is an example. Read more about sprintf crit1 = {'Some','Key','Words','Here','To','Set','The','Criterion'}; s = sprintf('%...

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How to view the entire 3D object in XY plane and access the values from it
Try rotate [x,y,z] = ellipsoid(); h = surf(x,y,z); rotate(h,angle,dir,origin) z1 = get(h,'zdata');

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How to plot on two y- axis
You have 3D data. How do you want it to plot in 2d? s = load('test.mat')

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Replacing certain values in table with NaN based on different conditions
Maybe you need to convert your data into matrix first A = randi(10,5,4) ind = A(:,1) < 5; % have this error when using '...

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how to plot 1x1 struct timeseries having field names cell 1x1 array? The .mat file is a time series data with 3 columns of data with respect to time.
Extrac the data and plo % % Plotting data from the .mat file data = load('THPWM.mat'); fieldnames(data) data.ans x = dat...

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how can I compare two columns from a differente table that are similar but no equal and then take the difference?
Here is my idea if length(T2.min) > length(T1.xmin) T = T1; else T = T2; end for i=1:length(T.xmin) if abs(...

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2D contour plot considering the boundary of data
Use initmesh to mesh [x,y,z] = peaks(20); t = linspace(0,-pi,20); [xr,yr] = pol2cart(t,2); % round part x1 = [-3 -3 ...

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Create an image (pixels) circle with slices (not from the center) and paint each slice a different color
Here is an example with using matrix r0 = 100; % radius of a circle t = linspace(0, 2*pi, 15...

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Interpolate scattered values on a regular grid with bi-harmonic interpolation method
Create appropriate mesh x = linspace(min(reservoir(:,1)),max(reservoir(:,1)),20); y = linspace(min(reservoir(:,2)),max(reservo...

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Loop in loop only returns results of first iteration
Try to preallocate Vol variable before for loop. Vol has size 141 after first iteration, that's why you have 282 elements Vol =...

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How to place/ define points on a triangulated meshed surface?
Here is another approach, but works only if you don't have points inside: pick a point inside a contour (center) convert data ...

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How can I make multiple lines on a graph more spaced apart?
Try semilogy Try legend t = 0:0.1:10; plot(t,sin(t),'.r') line(t,sin(t)) line(t,cos(t),'marker','.','color','g') line(t,co...

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How to update main grid with a seperately created subgrid values
Here is an example ind1 = X < min(x(:)) & X < max(x(:)); % indices inbetween smallest and largest 'x' ind2 = Y < min(y(:)) &...

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Hi all I am trying to plot a second order BVP in MATLAB
Here is the problem

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