how do i get this to plot a graph

Question

Carl Laarakker 2021-4-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/800261-how-do-i-get-this-to-plot-a-graph

评论： Carl Laarakker 2021-4-12

采纳的回答： David Fletcher

close all

T= 1;

P = 4;

rs = 3.4;

lamda = 0.2;

Lss = .0011+(3/2)*.011;

rpm = 0;

wr = (P/2)*(2*pi*(rpm/60));

x = (lamda*rs)/((rs*rs)+(wr*wr)*(Lss*Lss));

new_VS = ((T*4/(x*3*P))+(wr*lamda))/sqrt(2);

total_vdc = 0;

N = 600 ;

while (rpm < N)

wr = (P/2)*(2*pi*(rpm/60));

x = (lamda*rs)/((rs*rs)+(wr*wr)*(Lss*Lss));

new_VS = ((T*4/(x*3*P))+(wr*lamda))/sqrt(2);

total_vdc = sqrt(2)*new_VS*2;

rpm = rpm + 1;

hold on

plot(rpm,total_vdc)

end

I can not seem to get this to plot. I only get blank graph. What am I doing wrong? Thank you in advance

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Answer 1

David Fletcher 2021-4-12

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/800261-how-do-i-get-this-to-plot-a-graph#answer_673621

编辑：David Fletcher 2021-4-12

在 MATLAB Online 中打开

You are trying to plot isolated unconnected points - they can't be joined with a line so the only way you can see them is to use a marker

plot(rpm,total_vdc,'+')

This will give you a graph (of sorts), but I doubt it is what you want.

Try this:

T= 1; 
P = 4; 
rs = 3.4;
lamda = 0.2;
Lss = .0011+(3/2)*.011; 
rpm = 0; 
wr = (P/2)*(2*pi*(rpm/60));
x = (lamda*rs)/((rs*rs)+(wr*wr)*(Lss*Lss)); 
new_VS = ((T*4/(x*3*P))+(wr*lamda))/sqrt(2);
total_vdc = 0;  
N = 600 ;
iter=1;
while (rpm < N)
    
    wr = (P/2)*(2*pi*(rpm/60));
    x = (lamda*rs)/((rs*rs)+(wr*wr)*(Lss*Lss));
    new_VS = ((T*4/(x*3*P))+(wr*lamda))/sqrt(2);
    total_vdc(iter) = sqrt(2)*new_VS*2;
    Y(iter) = rpm;
    iter=iter+1;
    rpm = rpm + 1;
    
end
plot(Y,total_vdc)