Answered

How to trim the non-manifold triangle off the stl file?

There is SW that can detect topology issue and attempt to correct it, such as https://www.meshlab.net/

How to trim the non-manifold triangle off the stl file?

There is SW that can detect topology issue and attempt to correct it, such as https://www.meshlab.net/

9 months ago | 0

Answered

how to count the number of occurrences of these numbers (with some conditions)

A(1,:) = [1, 2, 5, 2 , 1 , 2]; A(2,:) = [0,1,1,0,1,0]; [B,~,J] = unique(A(1,:)); N = accumarray(J(:),A(2,:)'); B = B'; ta...

how to count the number of occurrences of these numbers (with some conditions)

A(1,:) = [1, 2, 5, 2 , 1 , 2]; A(2,:) = [0,1,1,0,1,0]; [B,~,J] = unique(A(1,:)); N = accumarray(J(:),A(2,:)'); B = B'; ta...

9 months ago | 0

| accepted

Answered

How to select complementary elements from a vector?

d = [33 20 4 5 6 75 8 9 0]; I = [1 3 7]; d(I) = []

How to select complementary elements from a vector?

d = [33 20 4 5 6 75 8 9 0]; I = [1 3 7]; d(I) = []

9 months ago | 0

Answered

How to select complementary elements from a vector?

d = [33 20 4 5 6 75 8 9 0]; I = [1 3 7]; d(setdiff(1:end,I))

How to select complementary elements from a vector?

d = [33 20 4 5 6 75 8 9 0]; I = [1 3 7]; d(setdiff(1:end,I))

9 months ago | 0

| accepted

Answered

Multiple griddata calls into a single one (same grid)

For nearest/linear/cubic method you can build the matrix https://www.mathworks.com/matlabcentral/fileexchange/85939-mat-op-ex, f...

Multiple griddata calls into a single one (same grid)

For nearest/linear/cubic method you can build the matrix https://www.mathworks.com/matlabcentral/fileexchange/85939-mat-op-ex, f...

9 months ago | 0

Answered

Multiple griddata calls into a single one (same grid)

If you are ready to trade 'v4' method for something else, you can use scatteredInterpolant % example of fake data x = -3 + 6...

Multiple griddata calls into a single one (same grid)

If you are ready to trade 'v4' method for something else, you can use scatteredInterpolant % example of fake data x = -3 + 6...

9 months ago | 0

Answered

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

The for loop varable is lowercase L char "l" (l), not one "1" (1) for l=1:n

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

The for loop varable is lowercase L char "l" (l), not one "1" (1) for l=1:n

9 months ago | 0

Answered

Passing structs/objects to functions

"Does the compiler realize which parts of the struct are actually needed and pass only these to the function? " MATLAB don't pa...

Passing structs/objects to functions

"Does the compiler realize which parts of the struct are actually needed and pass only these to the function? " MATLAB don't pa...

9 months ago | 0

| accepted

Answered

Smallest number of data type single

>> realmin('single') ans = single 1.1755e-38 >>

Smallest number of data type single

>> realmin('single') ans = single 1.1755e-38 >>

9 months ago | 0

Answered

Please help me vectorize my loop to construct query vector from sample points

xs=cumsum(ceil(10*rand(1,10))) t=pi; p=cumsum([0 ceil(diff(xs)/t)]); xq=interp1(p,xs,0:p(end))

Please help me vectorize my loop to construct query vector from sample points

xs=cumsum(ceil(10*rand(1,10))) t=pi; p=cumsum([0 ceil(diff(xs)/t)]); xq=interp1(p,xs,0:p(end))

9 months ago | 0

| accepted

Answered

Non-convex shape as a collisionBox for robot path planning

The MATLAB probably use GJK algorithm that requires convex shape. You should split the object in sum of convex. I can recommend...

Non-convex shape as a collisionBox for robot path planning

The MATLAB probably use GJK algorithm that requires convex shape. You should split the object in sum of convex. I can recommend...

9 months ago | 0

Answered

Fast implementation of max-plus matrix multiplication

function C = mp_prod(A,B) m=size(A,1); n=size(B,2); AA=reshape(A,m,1,[]); BB=reshape(B.',1,n,[]); C=max(AA+BB,[],3); tic/t...

Fast implementation of max-plus matrix multiplication

function C = mp_prod(A,B) m=size(A,1); n=size(B,2); AA=reshape(A,m,1,[]); BB=reshape(B.',1,n,[]); C=max(AA+BB,[],3); tic/t...

9 months ago | 2

Answered

Preallocating cells with unknown output size

If the size is not known, a good way is the to grow the preallocation array exponentially. Rather than the assigment X{i,j} =...

Preallocating cells with unknown output size

If the size is not known, a good way is the to grow the preallocation array exponentially. Rather than the assigment X{i,j} =...

9 months ago | 0

| accepted

Answered

Size mismatch error on dimension 2: expected 1, but actual size is 3 (Matlab Coder)

Size of ones(SimCoreIn(k).Ns,SimCoreIn(k).Np) = 102 x 3 So (102 x 1).*(102 x 3) gives (102 x 3) right. Right but cod...

Size mismatch error on dimension 2: expected 1, but actual size is 3 (Matlab Coder)

Size of ones(SimCoreIn(k).Ns,SimCoreIn(k).Np) = 102 x 3 So (102 x 1).*(102 x 3) gives (102 x 3) right. Right but cod...

10 months ago | 0

| accepted

Answered

Why the sparse pattern of a sparse matrix changed

The mex probably creates a non-valid sparse matrix, use spok to check validity

Why the sparse pattern of a sparse matrix changed

The mex probably creates a non-valid sparse matrix, use spok to check validity

10 months ago | 1

| accepted

Answered

continuous piecewise linear approximation of data set

see if this can help you https://www.mathworks.com/matlabcentral/fileexchange/25872-free-knot-spline-approximation

continuous piecewise linear approximation of data set

see if this can help you https://www.mathworks.com/matlabcentral/fileexchange/25872-free-knot-spline-approximation

10 months ago | 0

Answered

App does not execute properly unless in debug mode [R2020b]

May be you should add drawnow so as things get refresed app.run.Enable='off' drawnow

App does not execute properly unless in debug mode [R2020b]

May be you should add drawnow so as things get refresed app.run.Enable='off' drawnow

10 months ago | 0

Answered

Calling script from a function is recommended?

Inconvenience: MATLAB coder cannot work on script inside function

Calling script from a function is recommended?

Inconvenience: MATLAB coder cannot work on script inside function

10 months ago | 0

Question

Calling script from a function is recommended?

Now and then I call script from a function, the purspose is often initialize some constant values that are shared by across the ...

10 months ago | 2 answers | 0

Answered

How to speed up this for loop containing kronecker product?

Yesterday I profile your code and the majority of time is eaten by H = K_D*K_D' - K_S*K_S'; not by Kronecker. The question is...

How to speed up this for loop containing kronecker product?

Yesterday I profile your code and the majority of time is eaten by H = K_D*K_D' - K_S*K_S'; not by Kronecker. The question is...

10 months ago | 0

Answered

svds(X,r) and svd(X,'econ') generating different singular vectors for large complex matrix X ??

The singular value (eigen) decomposition SVD/SVDS is not unique, vectors is up to scaling, (values is up to order for eigen valu...

svds(X,r) and svd(X,'econ') generating different singular vectors for large complex matrix X ??

The singular value (eigen) decomposition SVD/SVDS is not unique, vectors is up to scaling, (values is up to order for eigen valu...

10 months ago | 1

| accepted

Answered

How to find the first element in ascending numbers that repeat?

A = [1 2 3 4 0 1 0 1 0 1 0 1 2 3 4 0 1 0 1 0 1 1 2 3 4] b = find(A(1:end-1)==1 & diff(A)>0)

How to find the first element in ascending numbers that repeat?

A = [1 2 3 4 0 1 0 1 0 1 0 1 2 3 4 0 1 0 1 0 1 1 2 3 4] b = find(A(1:end-1)==1 & diff(A)>0)

10 months ago | 0

Answered

Calculating a matrix with a specific form

There might be a better mehod, at least more geometric, than linear system solving. I understand you want to find m (3 x 1) suc...

Calculating a matrix with a specific form

There might be a better mehod, at least more geometric, than linear system solving. I understand you want to find m (3 x 1) suc...

10 months ago | 2

Answered

How to select complementary elements from a vector?

>> d(~ismember(d,I)) ans = 2 5 6 8 9 0

How to select complementary elements from a vector?

>> d(~ismember(d,I)) ans = 2 5 6 8 9 0

10 months ago | 1

Answered

Vectorization of Weighted Minkowski Distance

[n,m] = size(X); % do not use length Xi = reshape(X,[n,1,m]); Xj = reshape(X,[1,n,m]); tt = reshape(theta,[1,1,m]); Mat2 = s...

Vectorization of Weighted Minkowski Distance

[n,m] = size(X); % do not use length Xi = reshape(X,[n,1,m]); Xj = reshape(X,[1,n,m]); tt = reshape(theta,[1,1,m]); Mat2 = s...

10 months ago | 0

| accepted

Answered

How to find the first number, ignore subsequent until a greater number repeats.

A = [ 0 3 0 3 0 3 0 3 0 4 0 4 0 4 0 4 0 5 0 5 0 5 0 5 0 5 0 3 0 3 0 3]: b = find(A==3); c = diff(b); b([1 find(c>c(1),1,'firs...

How to find the first number, ignore subsequent until a greater number repeats.

A = [ 0 3 0 3 0 3 0 3 0 4 0 4 0 4 0 4 0 5 0 5 0 5 0 5 0 5 0 3 0 3 0 3]: b = find(A==3); c = diff(b); b([1 find(c>c(1),1,'firs...

10 months ago | 1

| accepted

Answered

Assignment of variables by comma separated lists

Use deal >> A = struct('number', cell(1, 5)); >> A A = 1×5 struct array with fields: number >> n=1:5; >> c...

Assignment of variables by comma separated lists

Use deal >> A = struct('number', cell(1, 5)); >> A A = 1×5 struct array with fields: number >> n=1:5; >> c...

10 months ago | 0

Answered

High level question: use Matlab Compiler to integrate a function.m into C++ code

You need Compiler SDK to build shaed library Compiler alone can compile only to standalone app

High level question: use Matlab Compiler to integrate a function.m into C++ code

You need Compiler SDK to build shaed library Compiler alone can compile only to standalone app

10 months ago | 1