In MATLAB, x = 2:6; y = sin (X. * exp (x)); Z = trapz (x, y), how to change '2:6' into any number 'A: B'?

In MATLAB, x = 2:6; y = sin (X. * exp (x)); Z = trapz (x, y), how to change '2:6' into any number 'A: B'?

After watching for a long time, I think you may want the following results:
Min = input ('Please input min = ');
Max = input ('Please input max = ');
x= Min:Max;
y=sin(x.*exp(x));
z=trapz(x,y)

Matlab composite trapezoidal formula for integral a = 0; b = pi / 6; n = 6; X = A: (B-A) / N: B; y = sqrt (4 - (sin (x)) ^ 2); s = trapz (x, y)

a=0;
b=pi/6;
n=6;
x=a:(b-a)/n:b;
Y = sqrt (4 - (sin (x)). ^ 2);% less
s=trapz(x,y)

Drawing the graph of X * sin (x) with MATLAB

Clear all; CLC; y = @ (x) X. * sin (x); ezplot (y); grid on; --- or clear all; CLC; X = - 2 * PI: pi / 20:2 * PI; y = X. * sin (x); plot (x, y); grid on;