MATLAB: 1-d gradient

gradient convlution

can i use covlution to get the same result of 1-d gradient

Best Answer

Your question contains the answer already. If the data is a vector, conv is sufficient instead of conv2:

x    = rand(1, 10)
dx_1 = gradient(x)
dx_2 = conv(x, [0.5, 0, -0.5], 'same')

The first and last element of dx_2 differ from dx_1, but you can adjust it with the one-sided quotient of differences easily.

Related Solutions

MATLAB: How to Plot a second derivative equation

Try this:

syms x(t) equ(t) 
Dx = diff(x);
D2x = diff(x,2);
w = 1
% dt = 1/1000;
% t = 0:dt:1000*dt;                                     % Not needed Here
equ = D2x + (Dx)^3 + x(t)^2 *Dx + x(t);
equ(t) = subs(equ, x, {exp(-1i*w*t)+exp(1i*w*t)})       % Substitute Expression For 
figure
fimplicit(equ, [-1 1])                                  % Use ‘fimplicit’ To Plot ‘equ(t)=0’
grid

The plot is absolutely not interesting, however the code runs without error!

MATLAB: I can’t plot 2nd order differential equation

I can!

Try this:

syms x(t);
Dx = diff(x);
Dx2 = diff(x,2);
x(t) = dsolve(Dx2+(5*Dx)+(6*x)==100,x(0)==0,Dx(0)==0)
figure(1)
fplot(x, [0 10])
axis([xlim    0  17])
grid

Best Answer

Related Solutions

MATLAB: How to Plot a second derivative equation

MATLAB: I can’t plot 2nd order differential equation

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