Dear there,
I have a piecewise function u(x,t) as following code. I want to plot u(x,t) on the region (x,t) ∈ [-1,1]x[-2,2] by using the contour surface plot as the link
Could you help me please?
Thanks
clc;clear all;syms x t t1 = exp(x);t21 = -5 .* t;t3 = exp(t21);t5 = exp((1 + t21));t4 = ((0 <= t & t <= 1/2) .* 1.73205);t5 = ((0 <= t & t <= 1/2) .* (30.9839 .* t - 7.74597));t6 = ((1/2 <= t & t <= 1) .* 1.73205);t7 = ((1/2 <= t & t <= 1) .* (30.9839 .* t - 23.2379));t6 = (1 + t5).^2;t2 = 1 ./ t6;t7 = (1 + t3).^2;t3 = 1 ./ t7;t8 = -0.00399646;t9 = 0.00922094;t10 = 0.0415432;t11 = 0.0603743;t12 = 0.177671;t13 = ((0 <= x & x <= 1/2) .* 1.73205);t14 = ((0 <= x & x <= 1/2) .* (30.9839 .* x - 7.74597));t15 = ((1/2 <= x & x <= 1) .* 1.73205);t16 = ((1/2 <= x & x <= 1) .* (30.9839 .* x - 23.2379));t8 = (1 + t1).^2;t1 = 1 ./ t8;u = -1/4 + (-0.00243052 .* t13 - 0.000809061 .* t14 - 0.00195593 .* t16 - 0.0152378 .* t15) .* t4 + (-0.00043359 .* t13 - 0.000146113 .* t14 - 0.000477063 .* t16 - 0.00319022 .* t15) .* t5 + (-0.00276115 .* t13 - 0.000933166 .* t14 - 0.00314361 .* t16 - 0.0207985 .* t15) .* t6 + t7 .* (0.000172747 .* t13 + 0.0013619 .* t15 + 0.00021141 .* t16 + 5.86775e-05 .* t14) + x .* (t10 .* t4 + t11 .* t6 + t5 .* t9 + t7 .* t8 + t12 + t2 - t3) + t3 + t1;
Best Answer