Ploting a function in a for loop

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

Answer 1

[Walter Roberson]

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)