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# Mahsa

Active since 2013

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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

Question

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

find 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

Question

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

Question

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

Question

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

delete 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

Question

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

Question

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

Question

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

Question

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