plotting with variable parameter

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?

Answer 1

[Star Strider]

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')

EDIT —

Added plot figure —

.

Answer 2

[Reeshabh Kumar Ranjan]

Hey Mesbahose,

I think this answers your question: https://in.mathworks.com/help/control/ug/build-app-with-interactive-plot-updates.html