Ploting a function in a for loop
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Ahmet Oguz
il 22 Nov 2016
Risposto: Walter Roberson
il 23 Nov 2016
d starts from zero and end at 0.99. For each d, i want to calculate y function. After that i want to plot y versus d. However my code does not generate plot. What am i doing wrong?
clc
k=0;
for d=0:0.01:0.99
k=k+1;
y(k)=1/(1+0.018*(d/(1-d)+d));
plot (y(k),d)
end
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Walter Roberson
il 23 Nov 2016
By default, when you plot() a single point, no marker is used. Also, no line is drawn unless you plot at least two points at the same time. Furthermore, you have not used "hold on" so your later plots erase the first.
You should use a different strategy:
dvals = 0 : 0.01 : 0.99;
for k = 1 : length(dvals)
d = dvals(k);
y(k)=1/(1+0.018*(d/(1-d)+d));
end
plot(dvals, y)
Or, more simply,
d = 0 : 0.01 : 0.99;
y = 1 ./ (1 + 0.018 .* (d ./ (1-d) + d));
plot(dvals, y)
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