Plotting only one data point

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Aleily Partida
Aleily Partida 2021-1-29
回答： KSSV 2021-1-29
Hello im trying to do a plot but its only plotting one data point.
The code is:
Xei_1 = Xei;
Er = abs((Xei - Xei_1)/Xei_1)*100;% calculating Relative Error
plot(i,Er,'-o'); % plotting iterations and relative % errors
xlim([1,imax]);
ylim([0,100]);
xlabel('Iteration');
ylabel('Relative % Error')
grid on

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回答（1 个）

KSSV
KSSV 2021-1-29
It looks like you are running a loop. Follow like shown below:
N = 100; % loop count
Er = zeros(1,N) ;
for i = 1:N
Xei_1 = Xe(i);
Er(i) = abs((Xei - Xei_1)/Xei_1)*100;% calculating Relative Error
end
plot(1:N,Er)
Also you can vectorise the lines depending on what your code is.

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