Answered
Get separate index from a column with separate conditions
Remember, you are in a world of finite precision computers... ftol=@(t) abs(TIME-t)<smallnumber; %compare to within a tole...

3 years ago | 0

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Answered
Include all possible combinations in loop?
%% 'ConcreteData' (matrix 1030x8) R2_all = (value1,value2,value3,value4,value5,value6,value7,value8) %%pre-defined values exit...

3 years ago | 0

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Answered
How can I turn xyz position data with a hole into a closed surface to do more sophisticated lighting and transparency settings?
and my best attempt at a surface using boundary() You could try alphaShape instead. Choose the alpha radius to be slightly larg...

3 years ago | 0

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Answered
Issue with trainNetwork() function
I am trying to interpret what and how this darker blue field of the training plots means, The light blue line measures accuracy...

3 years ago | 0

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Answered
How to input 2D array data for Deep learing toolbox model, not image file
Currently, the data is in CSV format, but I can convert it into a suitable 2D array. An imageDataStore has a ReadFcn property ...

3 years ago | 0

Answered
Combine .mat files with 1x1 struct with 11 fields (tables)
Files=compose("eCRF%.3d", (1:200)); S = arrayfun( @(z)load(z).CRF, Files ); for f=string(fieldnames(S))' w...

3 years ago | 0

Answered
transform an empty matrix '0x0 double' into a matrix '0x1 uint8'
x=zeros(0,0); y=uint8( reshape(x,0,1) ); whos x y

3 years ago | 1

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How can i find inside area of the geometry (2d) ??
Area = polyarea([x1;x2],[y1;y2])

3 years ago | 1

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Answered
How to fit an equation (catenary equation in 2D) to a 3D dataset (experimental data of a catenary curve in 3D) ?
In the Examples tab of this FEX page, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-for-fitt...

3 years ago | 1

Answered
Uable to call the solutions in a system of linear equation
clear; a = sym('a',[1 5]) b = sym('b',[1 5]) ... Sol0 = vpa(S.b1) Sol1 = vpa(S.b2) Sol2 = vpa(S.b3) Sol3 = vpa(S....

3 years ago | 0

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Calculating the sum of squared within cluster distances
The method you've posted is highly inefficient. You should just do, Dk=2*width(cluster)*(norm(cluster-mean(cluster,2),'fro')^2 ...

3 years ago | 1

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Answered
How to sum two cells element by element?
One way, A={1,2}, B={10,20}, C=cellfun(@plus, A,B,'uni',0)

3 years ago | 0

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Answered
Nlinfit error (jacobian's column are zero)
The best trouble shooting approach would be to first obtain the Jacobian at the solution by calling nlinfit with more output arg...

3 years ago | 0

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Answered
How do I prompt user to re-input value if first attempt is incorrect?
Something like this, perhaps? exit=false; msg='Please enter an R^2 value for Cement: ' while ~exit data = str2double( i...

3 years ago | 0

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Answered
Simultaneously fitting two non-linear equations with shared model coefficients
Since the error message is complaining about the initial point, you should check the value of modelfunc() at the initial point. ...

3 years ago | 0

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How do I locate the most repeated elements in an array/vector?
Using this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/78008-tools-for-processing-consecutive-repetition...

3 years ago | 0

Answered
How to perform mathematical operation of arrays inside loop?
for i=1:N E=B-A*X; if norm(E,1)<1e-40, continue; end C=E.^2; X=lscov(A,B,1./C); end...

3 years ago | 1

Answered
Why there is a large numerical error in simple arithmatics?
You need to look at the relative errors. You will see that they are super-small: x = rand(1,1); x_1000 = x*1000; N = -20 : ...

3 years ago | 0

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fsolve no solution found results
Is the output the last iteration or does it output the initial conditions? It is the last iteration, as you can easily test, .e...

3 years ago | 0

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Answered
fmincon sometimes returns "incorrect number of elements of objective gradient" error.
My best guess is that the MaxFunctionEvaluations limit was reached midway through finite differencing operations needed to compl...

3 years ago | 0

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non linear regression problem. fitnlm gives error
Your model function can easily generate NaN's and Infs because with fitnlm there is nothing to bound the b parameters (see below...

3 years ago | 0

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Defining normal unit vector for arbitrary plane surface in 3D space
Use planarFit() in this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/87584-object-oriented-tools-for-fitt...

3 years ago | 0

Answered
How can i get the smallest shape using a list of centroid coordinates?
You can use bwalphaclose from this FEX download, https://www.mathworks.com/matlabcentral/fileexchange/90762-further-tools-for-a...

3 years ago | 0

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Answered
Plotting the vertex based hexagon hierarchical structure.
P=rotate(nsidedpoly(6,'SideLength',1),30); %1 hexagon plot(P,'FaceColor','none'); axis equal P=fcopy(P,sqrt(3)*[1,0], 0:7 ...

3 years ago | 0

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Creating 3D efficiency map using interpolation.
torque=torgue; F=scatteredInterpolant(speed(:),torque(:), efficiency(:)) Now use F to query the points you want as explained...

3 years ago | 1

Answered
Finding a set of easily distinguishable local minima quickly and algorithmically.
load matlab y=im_mean(:); x=(1:numel(y)).'; k=(y==movmin(y,21)); plot(x,y,'-', x(k),y(k),'ro'); legend('Signal','Local...

3 years ago | 0

Answered
How to plot an in-ellipse(ellipse inside an object) which also matches the object orientation.
a=5; b=3; %axes lengths theta=40; %rotation angle x0=1;y0=2; %center fcn=@(p) translate( rotate( scale(p,[a,b]), theta),...

3 years ago | 1

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Answered
Trouble using Curve Fitter tool
I am not sure I understand what you mean regarding apparent singularities in my x,y data. If beta+k2*x=0 or delta+k4*x=0 then y...

3 years ago | 0

Answered
fmincon non-linear optimisation: issues with sqp and interior-point
SQP...Basically, it lacks the tools to make a step back when overshoots On the contrary, it is one of the few algorithms that c...

3 years ago | 0

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Answered
How to find the value in one column based on a value of a another column.
% Generate example data time = (0:0.1:1)'; pressureA = 20*sin(time/3); pressureB = 20*sin(pi*time/4); pressureC = 20*sin(p...

3 years ago | 0