can i create a real variable i.e variable which does not have any value but i will specify the datatype of variable and i want to use it for ploting

can i create a real variable i.e variable which does not have any value but i will specify the datatype of variable and i want to use it for ploting

Answer 1

[Anuj]

X = sym('X')

[gavr]

thank you

[gavr]

but what i really want is i need to create a continuous variable suppose x and plot sinx i will define x as just real number can you write code for this please

Answer 2

[Walter Roberson]

syms x
f = sin(x);
xvals = 0 : .01 : 2*pi;
plot(xvals, double(subs(f, x, xvals)));