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**Content Feed**

Question

How to solve nonlinear system of equations

Hi, I am trying to solve a flow network of various "nodes" or "stations" that have nonlinear relationships between them. The n...

8 months ago | 0 answers | 0

### 0

answersQuestion

how to arrange data into array

Hi, i have imported some matrix data into matlab and upon parsing the data i have it in 3 vectors (columns): column 1 are ...

2 years ago | 1 answer | 0

### 1

answerQuestion

looking for regular expression to parse sparse data

Hi, i have a sparse mass matrix exported from ansys, and the data looks as follows: [ 1, 1]: 1.157e-07 [ 1, ...

2 years ago | 1 answer | 0

### 1

answerQuestion

How to overlay irregular grid over contour plot

Hi, i am looking to postprocess some finite element analysis data. I have a 2D mesh grid, which is non uniform, and associ...

3 years ago | 0 answers | 0

### 0

answersQuestion

integrate 2D data

Hi, I have a column vector X [Nx1], a Row Vector Y [1xM] and data Z [NxM] -> is there a way to integrate Z over the area defi...

3 years ago | 1 answer | 0

### 1

answerQuestion

How can i regexp this sample text?

im looking to grab all the data after "CHANNEL" into a cell array such that C{1,1} = Shell Angle and so on and looking to grab ...

3 years ago | 2 answers | 0

### 2

answersQuestion

How to textscan broken, delimited line into cell array?

I have data within a text file that looks like this: CHANNEL = ['AngR', 'Time', 'Disp', 'Velo', & 'Acce', 'Load', 'Forc', '...

4 years ago | 0 answers | 0

### 0

answersQuestion

How to use a cloud of points to interpolate the value at a given point?

I have a point cloud matrix A with columns 1,2,3,4 equal to X,Y,Z (locations) and Value I have a point B (xq,yq,zq) that i wa...

4 years ago | 1 answer | 0

### 1

answerQuestion

Significant "very low frequency" data near DC

Hi, i am performing an FFT on some strain gauge data to try and separate out the DC and vibratory components I have Time func...

4 years ago | 0 answers | 0

### 0

answersQuestion

using ODE45 to solve simultaneously independent ODE's vs. calling the function twice - different results...

Hi, i am trying to solve for the displacement of a spring & mass with rotating eccentric mass in X and Y directions. If ...

4 years ago | 2 answers | 0

### 2

answersQuestion

How to solve spring-mass ODE in rotating frame (without symbolic toolbox)

Hi, I am trying to solve the ODE of a spring & mass in the rotating frame. The equations of motion are as follows: mx...

4 years ago | 1 answer | 0

### 1

answerQuestion

How to code this mathematical (tensor) formula in Matlab

Hi, i'm looking to code this tensor notation formula into matlab: X = e.n - [n.e.n]n where n is a unit vector, e is a 3x3 ...

7 years ago | 1 answer | 0

### 1

answerQuestion

fprintf \n not working properly

Hi all, im trying to print out some data into a specific format so it can be read into another program. The code i am enacting c...

8 years ago | 1 answer | 1

### 1

answerQuestion

How to inverse a matrix efficiently?

Hi All, I have a 6x6 matrix with many symbolic variables inside. I am looking to invert this matrix. The matrix i have ...

8 years ago | 2 answers | 0

### 2

answersQuestion

Integrate symbolic function & maintain constants in solutions

Hi i am looking to integrate the below equation (F1) from 0->Inf a(1), a(2), a(3) are just constants a1,a2,a3 and i'd like to...

8 years ago | 1 answer | 0

### 1

answerQuestion

Integrate symbolic expression while maintaining constants

Hi i am looking to integrate the below equation (F1) from 0->Inf a(1), a(2), a(3) are just constants a1,a2,a3 and i'd like to...

8 years ago | 1 answer | 0

### 1

answerQuestion

How might i optimize / vectorize this function?

I have been using the function: http://www.mathworks.com/matlabcentral/fileexchange/29130-shortest-distance-between-two-lines...

8 years ago | 1 answer | 2

### 1

answerQuestion

How can i run a script in the background? How can i use more computer resources?

Hi, i am running a script with 2 outputs: [X, B] = function(inputs); which iterates up to about 10^7 times (trying to reac...

8 years ago | 2 answers | 0

### 2

answersQuestion

intersection of two cylinders in 3D space

HI everyone, does anyone know of an existing algorithm to check the intersection of two cylinders in 3D space? I believe this...

8 years ago | 4 answers | 3

### 4

answersQuestion

shortest vector between two line segments

Hi, im looking to find the shortest vector between two line segments. The purpose is that i generate two line segments in spa...

8 years ago | 1 answer | 0

### 1

answerQuestion

ezplot of function x = constant

Hi, i am trying to ezplot the function X = constant (to overlay with other plots) using the following command: n = ezplot(x-P...

9 years ago | 0 answers | 0

### 0

answersQuestion

generating randomly oriented non-intersecting cylinders in a unit cell

Hi all, Im trying to think of a way of generating non-intersecting randomly oriented cylinders within a unit cell volume for ...

9 years ago | 0 answers | 1

### 0

answersQuestion

overlaying multiple plots on the same set of axes

Hi, I'm looking to overlay multiple plots on the same axes. I am using ezplot for the plot of a function, and then i want to ...

9 years ago | 1 answer | 0

### 1

answerQuestion

how to plot a defined space?

F11*x^2 + F22*y^2 + F1*x + F2*y + 2*F12*x*y >= 1 I need to graphically represent the above equation over a given domain, all ...

9 years ago | 1 answer | 0

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answerQuestion

randomly generated non-intersecting ellipses

Hi all, i need to generate randomly distributed ellipses within square bounds that are non-intersecting generating the ran...

9 years ago | 2 answers | 2

### 2

answersQuestion

Regression with multiple variables

Hi all, admittedly, i have no experience with regression analysis, but i have the following problem: I am trying to genera...

9 years ago | 0 answers | 0

### 0

answersQuestion

Numerically integrating with weight factors

Hi, i am integrating a stiffness matrix over two euler angles, phi, theta. if i integrate the stiffness matrix over both angl...

9 years ago | 0 answers | 0

### 0

answersQuestion

2-D probability distribution

Hi all, I am trying to create an orientational average of a stiffness matrix. The stiffness matrix is for a generic align...

9 years ago | 0 answers | 0

### 0

answersQuestion

probability distribution over a sphere

Hi all, I am trying to create an orientational average of a stiffness matrix. The stiffness matrix is for a generic aligned c...

9 years ago | 0 answers | 0

### 0

answersQuestion

How can i evaluate this surface integral? (It has some singularities)

Im trying to integrate the following function over X (0->Pi) and then y (0-> 2*Pi). When i create a surface (x,y,z) after a v...

9 years ago | 1 answer | 0