How to plot smooth graph?
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Hi, I was stuck here.. can someone help me out? How do I make the Pbat1 and Pbat2 smooth?
P_load = [0,8000,10000,11000,20000,25000,25000,21000,30000,20000,12000,45000,12000,45000,23300,12000,15000,17000,20000,16000,12200,1000,2000,100];% Watts
plot(P_load,'linewidth', 2)
P_gen = ones(1,24).*29000; % Watts
P_lowerlimit = ones(1,24).*10000; % Watts
hold on
plot(P_gen, 'linewidth', 2)
plot(P_lowerlimit, 'linewidth', 2)
grid
xlim([1,24])
xlabel('Time (hours)')
ylabel('Power (Watts)')
hold on
Pnet1 = [];
Pbat1 = [];
Pnet2 = [];
Pbat2 = [];
for h = 1:24
Pnet1(h) = P_gen(h) - P_load(h);
Pnet2(h) = P_lowerlimit(h) - P_load(h);
if Pnet1(h) > 0
Pbat1(h) = 0;
else
Pbat1(h) = P_load(h) - P_gen(h);
end
if Pnet2(h) < 0
Pbat2(h) = 0;
else
Pbat2(h) = [P_gen(h) - P_load(h)]/3;
end
end
plot(Pbat1, 'linewidth', 3)
plot(Pbat2, 'linewidth', 3)
legend('Load','Generator','Lower limit','Battery energy(Discharge)','Battery energy(Charge)')
If possible, i need with spline code. Help appreciated, thank you.
采纳的回答
madhan ravi
2018-11-1
编辑：madhan ravi
2018-11-1
P_load = [0,8000,10000,11000,20000,25000,25000,21000,30000,20000,12000,45000,12000,45000,23300,12000,15000,17000,20000,16000,12200,1000,2000,100];% Watts
x=1:numel(P_load)
xx=linspace(1,numel(x),1000)
yy=interp1(x,P_load,xx,'pchip')
plot(x,P_load,'*g',xx,yy,'-k','linewidth', 2)
P_gen = ones(1,24).*29000; % Watts
P_lowerlimit = ones(1,24).*10000; % Watts
hold on
xx=linspace(1,numel(x),1000)
yy=interp1(x,P_gen,xx,'spline')
plot(x,P_gen,'og',xx,yy,'-m','linewidth', 2)
xx=linspace(1,numel(x),1000)
yy=interp1(x,P_lowerlimit,xx,'spline')
plot(x,P_lowerlimit,'or',xx,yy,'-b','linewidth', 2)
grid
xlim([1,24])
xlabel('Time (hours)')
ylabel('Power (Watts)')
hold on
Pnet1 = [];
Pbat1 = [];
Pnet2 = [];
Pbat2 = [];
for h = 1:24
Pnet1(h) = P_gen(h) - P_load(h);
Pnet2(h) = P_lowerlimit(h) - P_load(h);
if Pnet1(h) > 0
Pbat1(h) = 0;
else
Pbat1(h) = P_load(h) - P_gen(h);
end
if Pnet2(h) < 0
Pbat2(h) = 0;
else
Pbat2(h) = [P_gen(h) - P_load(h)]/3;
end
end
xx=linspace(1,numel(x),1000)
yy=interp1(x,Pbat1,xx,'spline')
plot(x,Pbat1,'ok',xx,yy,'-y','linewidth', 3)
xx=linspace(1,numel(x),1000)
yy=interp1(x,Pbat2,xx,'spline')
plot(x,Pbat2,'oc',xx,yy,'-r','linewidth', 3)
legend('Load','Generator','Lower limit','Battery energy(Discharge)','Battery energy(Charge)')
14 个评论
madhan ravi
2018-11-1
use the same method like last time
madhan ravi
2018-11-1
if something is not clear let me know
Ain Athirah
2018-11-1
编辑：Ain Athirah
2018-11-1
madhan ravi
2018-11-1
Anytime :)
Ain Athirah
2018-11-1
madhan ravi
2018-11-1
编辑：madhan ravi
2018-11-1
They are markers , read the below link for more explanation https://www.mathworks.com/help/matlab/ref/linespec.html
Ain Athirah
2018-11-1
madhan ravi
2018-11-1
See the previous comment
Ain Athirah
2018-11-1
madhan ravi
2018-11-1
You’re welcome
Ain Athirah
2018-11-1
Ain Athirah
2018-11-1
编辑：Ain Athirah
2018-11-1
I have a new problem now on how to label them? by using legend code, seems it be different between points and line.. see the picture:
How to make them be one? as they need to be. Thanks :D
madhan ravi
2018-11-1
Please ask a separate question
Ain Athirah
2018-11-1
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