Iver Brekken
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Question
fzero function not working with symsum
clear all clc close all y = 0.5; u = 0.25; syms n t fun = @(t) (-u + y-2/pi*symsum(1/n*sin(n*pi*(1-y))*exp(-(n*pi)^2*t),...
2 years ago | 1 answer | 0
1
answerQuestion
Index exceeds number of array elements
clear all clc close all y(1) = -100; y_exact(1) = -100; t0 = 0; t_end = 10; dt = 1/50; t = t0:dt:t_end; for i = lengt...
2 years ago | 1 answer | 0
1
answerQuestion
Error message with arrays
clear all clc close all h = [2:20:220]; t_a = 293; t_s = []; q_flux = 800; n = length(h); for i = 1:n t_s = q_flu...
2 years ago | 1 answer | 0
1
answerQuestion
Empty Sym when using vpasolve-operator.
e = [0.05:0.05:1]; syms tp eqn = 900-e.*5.67*10^(-8)*tp^4-20*(tp-293)==0; S = vpasolve(eqn,tp) I get the following message...
2 years ago | 1 answer | 0
1
answerQuestion
Contour plot using meshgrid
[x,y] = meshgrid(-5:0.1:5,-5:0.1:5); r = sqrt(x.^2+y.^2); theta = atan(y/x); gamma = 2; B = 2; u = 1; psi = u.*r.*sin(thet...
2 years ago | 1 answer | 0