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Bobby Fischer


Last seen: 2 years 前 |  自 2020 起处于活动状态

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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)...

3 years 前 | 1 个回答 | 0

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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?

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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已回答
Plot 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); ...

3 years 前 | 0

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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...

4 years 前 | 1 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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Matlab license expiration, now?
Now I get this message when I open Matlab: ---------------------------------------------------- Your MATLAB license will ...

4 years 前 | 1 个回答 | 0

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已回答
confusion on a new schema for solving ode
Hello, function euler1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% clc clear tic delta_q=1e-4; q1=0;...

4 years 前 | 0

| 已接受

已回答
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...

4 years 前 | 1

| 已接受

提问


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...

4 years 前 | 1 个回答 | 0

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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...

4 years 前 | 0

提问


ode45 fail with pendulum
Hello. I have proof that in my machine the pendulum goes all the way around, contradicting reality. Any thoughts? -------------...

4 years 前 | 1 个回答 | 0

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已回答
How 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...

4 years 前 | 0

提问


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...

4 years 前 | 0 个回答 | 0

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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...

4 years 前 | 0 个回答 | 0

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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...

5 years 前 | 2 个回答 | 0

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