How to plot a function against a matrix?

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Rohan Mudgal
Rohan Mudgal 2015-10-21
编辑： Robert 2015-10-21
I am having trouble plotting the function g(x)=a+(b*x)+(c*x^2) against the matrix r2=(0:.1:10) but I am struggling to find a way to do this. What should I write in my script to allow me to make a scatter plot of this function?

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回答（1 个）

Robert
Robert 2015-10-21
编辑：Robert 2015-10-21
I am assuming you mean to find the values of your function g(x) over all values defined in r2. If a, b, and c are scalars, then the only change you need is to use the element-wise power operator: .^
r2 = 0:0.1:10;
g = a + b*r2 + c*r2.^2;
Then you can plot g against r2 to view the results. For example:
plot(r2,g)
plot(r2,g,'o')
scatter(r2,g)

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