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I am trying to plot the value of the function P(x,y) along the line segment that connects (0,0) and (6,4)

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Kevin Junior
Kevin Junior 2013 年 10 月 8 日
コメント済み: Roger Stafford 2013 年 10 月 9 日
P(x,y) = 100*exp(-.4*( (x-1)^2 + 0.7*(y-3)^2))+ 80*exp(-.2*(2*(x-5)^5+1.5*(y-1)^2)); so I am going to use the plot(x.y) function. how do I plot a function along a segment that goes from (0,0) to (6,4) ? I am kind of lost.

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Matt J
Matt J 2013 年 10 月 8 日
Are you sure that is the range you want. Note that
>> P(0,0)
ans =
Inf
Kevin Junior
Kevin Junior 2013 年 10 月 8 日
am supposed to plot along a segment that starts at (0,0) and ends at (6,4)
Roger Stafford
Roger Stafford 2013 年 10 月 9 日
You had better pay attention to what Matt has told you. In the second term you will get exp(1251.5) at (0,0) which is an enormous number well above matlab's double precision floating point maximum value. Someone is pulling your leg or you have copied the problem incorrectly.

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回答 (1 件)

Honglei Chen
Honglei Chen 2013 年 10 月 8 日
編集済み: Honglei Chen 2013 年 10 月 8 日
I think you need to use plot3 for this. You need to first find x and y points you want. For example
x = 0:0.01:6;
y = 4/6*x;
z = x+y;
plot3(x,y,z);

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