how can i store each iteration values in a metrix to plot a straight line graph

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omar mahallawy 2018-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/436230-how-can-i-store-each-iteration-values-in-a-metrix-to-plot-a-straight-line-graph

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clear,clc,clf
format long
Q=0.03;
rouh=847;
g=9.81;
Gamma=(rouh.*g);
Zs=0;
Ze=0;
L=500;
Ks=(6*10.^-5);
viscosity=(1.1*10.^-6);
V=1.34:0.5:4.5
for I=1
	D=sqrt(((4.*Q))./(V.*pi))
end
Re=(V.*D./viscosity)
Er=(1.*10.^-8);
Fo=0.01;
for I=0:1:10^6;
	Fn=(1./(-4.*log10((Ks./(3.71.*D))+((1.26)./(Re.*sqrt(Fo)))))).^2;
	E=abs((Fn-Fo)/Fn);
	if  E<=Er;
		display(Fn),display(E),break,
	end
	if E>Er;
		Fo=Fn;
	end
end
Hloss=((Fn.*L.*Q.^2)./(12.*D.^5))
Hpump=Hloss+Ze-Zs
%calculating Hloss every 100M
for HLC=(1:100:500);
	HLC
	HlossN=((Fn.*HLC.*Q.^2)./(12.*D.^5))
	TEL=(Hpump-HlossN+Zs)
	HGL=(TEL-((V.^2)./2.*g))
	KE=(TEL-HGL)
end

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Image Analyst 2018-12-18

编辑：Image Analyst 2018-12-18

What variable do you want for y and what do you want for x?

None of your variables in your loops have indexes so the values are being overwritten on every iteration. So after the loop ends, all you have is a scalar, not a list of values. Is that what you want?

omar mahallawy 2018-12-18

well i need to plot a graph between HLC (X AXIS) and TEL (Y AXIS) and HGL (Y AXIS) i should get two parallel lines on seven seperate graphs using "subplot". that's why i need to sotre the values first and then plot a graph

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