How to shade area under curve between x values
3 views (last 30 days)
Show older comments
Kyle Lazaroff
on 14 Dec 2019
Answered: Image Analyst
on 14 Dec 2019
I can't get the area to fill between the dimensions quite right, it keeps shaping wrong area, so far i have this code below
close
clear
clc
r_d = 1.50e11; % distance from Earth to Sun
r_s = (1.39e9)/2; % radius of the sun
fw =(r_s/r_d)^2;
t_s = 5800; % temp in kelvin
h = 6.626e-34; % in J*s
k_b = 1.381e-23; % in J/K
c = 2.998e8; % in m/s
syms lambda L_sun
lambda = (0.001:0.01:3)*1e-6;
L_sun = fw .* (2*pi*h*c.^2) ./ lambda.^5 .*...
1./(exp((h*c)./(lambda*k_b*t_s)) -1);
figure(1)
plot(lambda, L_sun, 'b-', 'LineWidth', 2);
xlim([0 3e-6]);
xlabel('Wavelength (um)');
ylabel('Spectral Irradiance (W*m^2/m^-1)');
legend('L_s_u_n')
set(gcf, 'PaperPositionMode', 'manual');
set(gcf, 'PaperUnits', 'inches');
set(gcf, 'PaperPosition', [0 0 6.75 5]);
print('SolarIrradiance.tif', '-dpng', '-r600')
saveas(gcf, 'SolarIrradiance.fig')
%%
% Part 2.
maxL_sun = max(L_sun);
lambda_max = lambda(51);
% i. this falls in the visible region
% ii. uv = 6.4%, vis = 48%, and ir = 45.6%
% the energy for uv = 87, vis = 565, and ir = 623
UV = L_sun(1:38);
Vis = L_sun(39:78);
IR = L_sun(79:300);
UV_Vis_IR_fig = openfig('SolarIrradiance.fig');
hold on
and i need to shade the UV, Vis, and IR regions of a previously made graph and save it as a new one
0 Comments
Accepted Answer
More Answers (0)
See Also
Categories
Find more on Surface and Mesh Plots in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!