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Question

Defining boundary condition and initial condition for PDE.

I want to solve following 1D Burger's equation using pdepe. With the initial and boundary condition of 4. Unfortunately, I cou...

ongeveer 7 jaar ago | 0 answers | 0

### 0

answersQuestion

find the last non-zero value

For a regular vector we can use following command to extract the vector after pre-allocating. if m = [ 1 2 3 4 5 0 0 0 0...

ongeveer 9 jaar ago | 1 answer | 1

### 1

answerfind the last non-zero column in matrix in pre-allocated matrix

Oh I see it can be answered by find(any(M,1),1,'last')

ongeveer 9 jaar ago | 0

find the last non-zero column in matrix in pre-allocated matrix

another way is to delete the zeros if m = [ 1 2 3 4 5 0 0 0 0 0 0 0 0] m(m==0)=[] m= [1 2 3 4 5]; However my question i...

ongeveer 9 jaar ago | 0

Question

calculate the inv of a matric with one constant

Hello all, I have a simple question. Assume that I have the following matrix. How can I find the inv of this matrix based on "t...

meer dan 9 jaar ago | 1 answer | 0

### 1

answerQuestion

Preallocating zeros in cell array. and Which one is faster? 3D matrix, cell or structure data?

Hello all, I have to rewrite my Matlab code to make it faster. in some cases I need to used cell structure to keep my data: for...

meer dan 9 jaar ago | 2 answers | 0

### 2

answersQuestion

find the last non-zero column in matrix in pre-allocated matrix

Hello, My matlab code is creating very very matrix and I didn't pre-allocate it before. Because I always need to know the size ...

meer dan 9 jaar ago | 4 answers | 0

### 4

answersQuestion

Delet zeros after final number

Dear all, I'm looking for an efficient way to delete zeros after final number in MATLAB, A= [ 5 6 0 3 2 0 9 0 0 0 0 0 0] ...

meer dan 9 jaar ago | 2 answers | 0

### 2

answersdelete zero rows only with one number

if a = [9 0 0; 7 0 0; 8 2 0; 8 8 8] K>> t=a(all(a(:,2:end),2),:) t = 8 8 8 however it should be K>> t=a(a...

meer dan 9 jaar ago | 0

Question

delete zero rows only with one number

Dear all, I have a matrix like A =[23 45 23 56;26 0 0 0;45 23 65 34;34 0 0 0] I want a very efficient way to delete only the r...

meer dan 9 jaar ago | 4 answers | 0

### 4

answersQuestion

mesh generation for all known domain coordination

Hello, I'd like to generate a 3D mesh, for example, in my picture, if I calculate all points in a, h, f and c, how can I plot...

ongeveer 10 jaar ago | 0 answers | 0

### 0

answersQuestion

Arc length of Cubic Bezier Curve

Hello, I'm looking for an efficient way to calculate the arc length of Cubic Bezier curve, by knowing P0,P1,P2 and P3. Thank ...

ongeveer 10 jaar ago | 2 answers | 0

### 2

answersQuestion

Find the intersection of two vectors

I have two pairs of point and vector in 2d and I should find its intersection. for example: p0=[0,0] vector_p0=[0,1] and p1...

meer dan 10 jaar ago | 1 answer | 0

### 1

answerQuestion

Plotting Beziar curve by having tangent

My problem: I have coordinate and tangent of first point and the end point of Bezier curve and I should draw Bezier Curve in MAT...

meer dan 10 jaar ago | 0 answers | 0

### 0

answersQuestion

Plotting Bezier curve by having tangent

My problem: I have coordinate and tangent of first point and the end point of Bezier curve and I should draw Bezier Curve in MAT...

meer dan 10 jaar ago | 0 answers | 0