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How do I output to the command window where the sum of the bars on the graph equal zero along the x axis

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johnmurdock
johnmurdock 2019-4-23
回答： Star Strider 2019-4-23
clc;
clear;
close all;
A= -15000;
A(2:6)= 3200;
A(7:9)= [2133.333, 1066.667, 1000];
n=length(A);
for i =1:n
x(i) = i-1;
end
bar(x,A,0.25)
PW= 0;
int=[1.06 1.08 1.1];
for j= 1:length(int)
PW=0;
for t= 1:n
PW=PW+A(t)*int(j)^(-x(t));
PWA(j,t)=PW;
end
end
figure(1)
hold on
plot(x,PWA,'-x','LineWidth',2)
legend('CF diagram','1.06','1.08','1.1','Location','southeast')

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回答（1 个）

Star Strider
Star Strider 2019-4-23
If fyou are referring to ‘PWA’, try this (after your plot call):
for k = 1:size(PWA,1)
PWA0(k) = interp1(PWA(k,:), x, 0, 'linear', 'extrap');
fprintf('PWA = 0 at x = %4.2f\n', PWA0(k))
end
When I ran it, the result was:
PWA = 0 at x = 6.02
PWA = 0 at x = 7.47
PWA = 0 at x = 9.40
Experiment to get the result you want.

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