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From: Aditya jayanthi on 19 Jun 2010 17:36
I need help in plotting my data, I have two plots one for exact and numerical values of a function and the other for error, In my program i want to plot exact and numerical values in first plot and error on second plot and It completes one iteration , After it comes for the second iteration ,I need the same to happen again, I am trying hold on and hold off ,Its not wrking, here is my part of code

n=0;
for xi= delxi:delxi:ximax
for i=1:npteta
FE(i)=(erf((1-eta(i))/(2*sqrt(xi)))+erf((1+eta(i))/(2*sqrt(xi))))*0.5;
end

pn(1) = 1;
qn(1) = 0;
for i = 2:npteta-1
A(i) = (1.0/(deleta^2))-(delta/(2.0*eta(i)*deleta));
B(i) = -(2.0/(deleta^2))-(1.0/delxi);
C(i) = (1.0/(deleta^2))+(delta/(2.0*eta(i)*deleta));
D(i) = -F(i)/delxi;
pn(i) = -C(i)/(A(i)*pn(i-1)+B(i));
qn(i) = (D(i)-A(i)*qn(i-1))/(A(i)*pn(i-1)+B(i));
end
F(npteta) = 0;
for i = npteta-1:-1:1
F(i)=pn(i)*F(i+1)+qn(i);
end

for i=1:npteta
e(i)=FE(i)-F(i);

end
n=n+1;
if mod(n,1000)==0.0

plot(eta,F,'LineWidth',2);
hold on;
plot(eta,FE,'LineWidth',2);

plot(eta,e,'LineWidth',2);
end


From: sscnekro on 20 Jun 2010 15:50
Sorry, didn't have time to read your code properly. But maybe you need to create two figures, hm? Otherwise explain again, briefly.

% a figure
f1 = figure;
plot(eta,F,...);
hold on
plot(eta,FE,...);
% another figure
f2 = figure;
plot(eta,e,...);
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