# Bobby Fischer

**Statistics**

RANK**4 091**

of 265 176

REPUTATION**10**

CONTRIBUTIONS

**14** Questions

**5** Answers

ANSWER ACCEPTANCE **
64.29%
**

VOTES RECEIVED**1**

RANK**16 853** of 18 114

REPUTATION**1**

AVERAGE RATING**0.00**

CONTRIBUTIONS**1** File

DOWNLOADS **2**

ALL TIME DOWNLOADS**18**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

Question

Surf command to plot simple surface

Hi what is happening here: close all x = -1 : 0.1 : 5; y = x; [X, Y] = meshgrid(x,y); Z = 2*X - X*Y + 2*Y; surf(X, Y, Z)...

12 månader ago | 1 answer | 0

### 1

answerQuestion

Boundary value problem solvers in Matlab accept mixed boundary conditions, neumann boundary conditions?

Boundary value problem solvers in Matlab accept mixed boundary conditions, neumann boundary conditions?

ungefär ett år ago | 0 answers | 0

### 0

answersQuestion

simple fmincon problem, optimization toolbox

I have an optimization problem in that Matlab solves depending on the initial value given. First, I give X0 = [10 10 10] as the...

ungefär ett år ago | 1 answer | 0

### 1

answerQuestion

Show stats in bvp4c

Hi, I would like to see the stats, like the number of iterations. I have 'Stats' 'on' but doesn't show anything. Thanks for yo...

ungefär ett år ago | 1 answer | 0

### 1

answerQuestion

bvp4c's guess for boundary conditions

Hi. I'd like to know why the initial guess for the solution shouldn't always be the boundary conditions themselves. That is, why...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Light direction in surfl

Hi, I don't understand why it is not centered. x = -1:.1:1; y = -1:.1:1; [X,Y] = meshgrid(x,y); z = X.^2 + Y.^2; surfl(x,y...

mer än ett år ago | 1 answer | 0

### 1

answerPlot 2D data colormap

This could help: x = -3 + 6*rand(50,1); y = -3 + 6*rand(50,1); v = sin(x).^4 .* cos(y); F = scatteredInterpolant(x,y,v); ...

mer än ett år ago | 0

Question

Anomaly with comments and rating in one file in File Exchange.

https://www.mathworks.com/matlabcentral/fileexchange/85900-seawater-density-from-salinity-temperature-and-pressure I posted thi...

mer än ett år ago | 1 answer | 0

### 1

answerQuestion

Function 'subs' different output for a (similar?) input

clc syms F(t) F(t)=[-5*cos(2*t) -5*sin(2*t) 3*exp(2*t); -2*(cos(2*t)+sin(2*t)) 2*(cos(2*t)-sin(2*t)) 0; cos(2*t) sin...

mer än ett år ago | 1 answer | 0

### 1

answerSolved

Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

mer än ett år ago

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

mer än ett år ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

mer än ett år ago

Submitted

Fourier series finite expansion.

I did this to learn grosso modo how Fourier series work.

mer än ett år ago | 2 downloads |

Question

Matlab license expiration, now?

Now I get this message when I open Matlab: ---------------------------------------------------- Your MATLAB license will ...

mer än ett år ago | 1 answer | 0

### 1

answerconfusion on a new schema for solving ode

Hello, function euler1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clc clear tic delta_q=1e-4; q1=0;...

mer än ett år ago | 0

| accepted

Solved

Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

mer än ett år ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

mer än ett år ago

plot log with factor 20

Hello a=1.03; h=(a^200-a^20)/9; ypoints=a^(20):h:a^200; xpoints=log(ypoints)./log(a); figure(1) close(1) figure(1) h...

mer än ett år ago | 1

| accepted

Question

Discrepancy with easy ODE.

Hello, don't know why the discrepancy. function fcno y0=linspace(0,2,20); t0=linspace(0,3,100); figure(1) close(1) figure...

mer än ett år ago | 1 answer | 0

### 1

answerSolved

Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

mer än ett år ago

How to solve 'Index exceeds matrix dimensions.' error?

Hi, there was a bunch of things to correct. Don't know if the result still has some value because I don't know what I was workin...

mer än ett år ago | 0

Question

ode45 fail with pendulum

Hello. I have proof that in my machine the pendulum goes all the way around, contradicting reality. Any thoughts? -------------...

mer än ett år ago | 1 answer | 0

### 1

answerHow can i plot surfaces for a recursive function?

Hi, I have written this code. Is this what you meant? function []=bobby_98(n) lon=20; x=linspace(-1,1,lon); y=x; z=zeros(l...

mer än 2 år ago | 0

Question

Start new session everytime

Hi, I would like Matlab to open with the command window and no editor tabs open. That is, if I had editor tabs open in my last...

mer än 2 år ago | 0 answers | 0

### 0

answersQuestion

Quadrature rectangles transparency in plot

Hi, How can I change the transparency of the rectangles? function [I]=bobby_85(n) % n=30; n=300; p=1; h=1/(n-1); I=0; x...

mer än 2 år ago | 0 answers | 0

### 0

answersQuestion

How to fix axes in dynamic plot

Hi, I would like to fix the axes in this dynamic plot right from the beginning. Is there an easy way to do it? Thank you. cl...

mer än 2 år ago | 2 answers | 0