how to graph a polynomial in GUI using inputdlg or any other comand?

the interfaz from GUI is going to ask a polinomial using inputdlg , that polinomial needs to be graph in a axes

Answer 1

[Star Strider]

Here is one possibility:

coefc = inputdlg('Input the coefficients of your polynomial.  For example, if it is x^2 + 2*x - 3, type 1, 2, -3 ');
coefd = str2num(coefc{:});

ordp = length(coefd)-1;
x = linspace(-5, 5, 50);
pv = polyval(coefd, x);

figure(1)
plot(x, pv)
grid
ttl = sprintf(['Polynomial with coefficients ' repmat('%.2f  ', 1, length(coefd))], coefd);
title(ttl)
xlabel('x')
ylabel('y')

[Muthu Annamalai]

Nice code; I checked that ezplot works too,

   x = linspace(-5,5,50)
   ezplot(@(x) polyval(coefd,x),linspace(-5,5,100))

[Star Strider]

Thank you.

Very good point. I thought about explot because it very conveniently writes the function above the plot, but decided to just use plot.