Plotting a 2 dimensional graph

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Spencer S 2020-2-18

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评论： Aquatris 2020-2-20

Function: S(p,N) = 1 - (1-p)^N

Plot a two-dimensional surface showing that probability: S(p,N), 0p1,2N10,000.

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Spencer S 2020-2-19

so P takes on all numbers between 0 and 1. Do you mind providing me with the code?

Geoff Hayes 2020-2-19

Right but you still need to define what those values are for p. Is it sufficient to do something like

p = 0:0.01:1;

where the array p is all values 0, 0.01, 0.02, 0.03,..., 1.0? Or do you need more or fewer? Once you have determined that and done something similar for N (this is probably easier and you could use your code above), then you can use meshgrid as

[P,N] = meshgrid(0:0.01:1, 2:1:10000);

and then put those results in your above function. Then try using contour that Aquatris described below.

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Aquatris 2020-2-18

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What you are looking for is the "countour" function (or countourf) of Matlab. Check this link and you can adapty your equation to the given example.

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Spencer S 2020-2-19

I can't get it to work. I think the problem is N is between 2 an 10,000. Do you mind providing me with your code?

Aquatris 2020-2-20

Dont exactly know your values but something like this;

p = linspace(0,1,1e3);
N = linspace(2,1000,1e3);
[X,Y] = meshgrid(p,N);
Z = 1-(1-X).^Y; % notice the .^ since we do not want matrix algebra
contourf(X,Y,Z)

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