Looking for some help with MatLab. Basic question.

I am trying to create a function of time, take its derivative and then plot all three on a graph.

the function I want to plot is \[x(t)=e^{-(4-\sqrt{3})t}+e^{-(4+\sqrt{3})t}. This is what I have done.

t = [0:0.1:4]
x = exp(-(4-sqrt(3))*t)+exp(-(4+sqrt(3))*t)
v = diff(x)./0.1
plot3(x,v,t);

I get the error "Error using plot3
Vectors must be the same lengths."

and upon investigation, my function has an extra column than the other two.

how can I fix this?

Question

Looking for some help with MatLab. Basic question.

I am trying to create a function of time, take its derivative and then plot all three on a graph.

the function I want to plot is \[x(t)=e^{-(4-\sqrt{3})t}+e^{-(4+\sqrt{3})t}. This is what I have done. 

t = [0:0.1:4]
x = exp(-(4-sqrt(3))*t)+exp(-(4+sqrt(3))*t)
v = diff(x)./0.1
plot3(x,v,t);

I get the error "Error using plot3
Vectors must be the same lengths."

and upon investigation, my function has an extra column than the other two.

how can I fix this?