The plot was not out correctly

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Samantha Pham 2020-9-22

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https://ww2.mathworks.cn/matlabcentral/answers/598144-the-plot-was-not-out-correctly

评论： Samantha Pham 2020-9-22

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Hi, this is the codes i have for the problem but somehow the plot was not out correctly like the example output.

Please help me identify the mistake, please! TIA!

% TASK 1
Power = input('Enter the power rating of the lamp bulb [W]: ');
Time = input('Enter the time at which to calculate brightness [microseconds]: ');
I = 15 .* Power .* (1 - (1.40.*(exp(1)).^(-Time)) .* sin(1.43.*(Time) + pi./4));
fprintf('The brightness of the %d-Watt lamp will be %3.2f lumens at %d microseconds.\n', Power, I, Time);
% TASK 2
Surge = input('Enter the time the surge starts [microseconds]: ');
I = Brightness(Power, Time, Surge);
Surge = 10 .* Power .* exp(1).*(-1) .* sin(1.43./2);
fprintf('The brightness of the lamp will be %3.2f lumens at\n %d microseconds, after factoring in the power surge.\n', I, Time);
% TASK 3
Time = [0 : 0.01 : Time];
I = Brightness(Power, Time, Surge);
figure(1)
plot(Time, I, 'ro', 'LineWidth', 3);
title('Brightness of Lamp over Time');
xlabel('Time (t) [microseconds]');
ylabel('Brightness (I) [lumens]');
grid on

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Samantha Pham 2020-9-22

so, this is the task that i did on Matlab but submit in Zybook. Mainscripts and the question i asked the first time is not on the same assignment. What i mean is, i write the brightness function in one page, and i write the whole script on another page. On that page, all the function are coded correctly by the professpor, so even if i did wrong on the brightness function, it doesnt really matter on the mainscript. I hope it makes sense.

Yes, i have same graphs as you, but somehow the sample output from professor gives different and i honestly dont know where.

Below is the whole assignment description. Thank you!