plotting with variable parameter

Question

Mesbahose Salekeen 2020-6-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/553336-plotting-with-variable-parameter

编辑： Star Strider 2020-6-23

采纳的回答： Star Strider

let's say i want to plot a graph f(x)=x^3+b*x^2+1

but i want to visualize the graph as b changes lets say from -3 to 3 with .5 step. How can i do it?

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Answer 1

Star Strider 2020-6-23

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/553336-plotting-with-variable-parameter#answer_455896

编辑：Star Strider 2020-6-23

在 MATLAB Online 中打开

Try this:

f = @(b,x) x.^3+b.*x.^2+1;
bv = -3:0.5:3;                                          % Define ‘b’
x = linspace(-1, 1, 25);                                % Define ‘x’
[B,X] = ndgrid(bv,x);
F = f(B,X);
figure
plot(x, F)
lgdb = compose('%4.1f', bv);
lgd = legend(lgdb, 'Location','best')
title(lgd, 'b')