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visits member for 2 years, 9 months
seen May 5 at 21:38

Apr
20
comment Matlab Cropping Plots
yah I have no idea why it's not working. I've just went ahead and used this file to control whitespaces. But I'll mark this right since it works for you. Thanks!
Apr
20
comment Matlab Cropping Plots
are the ellipses supposed to be there? I hope that's not a stupid question, I'm new to matlab so I'm not a 100% on the syntax yet. Also I changed the font size of the x and y axis labels along with the title, is that going to change anything?
Apr
20
comment Matlab Cropping Plots
no that didn't work...i'm still getting some big whitespace on the left.
Apr
13
comment Matlab Index out of bounds
@mathguy so i set out=zeros(4,1) and did out(4)=A; and i'm still getting the same error
Apr
13
comment Matlab Index out of bounds
@mathguy of course but I don't see how A could possibly change...
Apr
13
comment Matlab Index out of bounds
@Daryl but then it says too many input arguments
Apr
10
comment Non-linear Partial Differential Equations
but the partial derivative of that with respect to $t$ does not give $\rho^2$....or maybe I'm taking the partial derivative incorrectly..
Apr
10
comment Partial Differential Equations
well you would have $c_1e^{At}$ which is just $cos(x)e^{sin(x)t}$. Would that be right?
Mar
18
comment Logistic Equation with MatLab
@Amzoti if I made 1 .m file called logistic.m that contained the equation (with $a$ and $b$ being global) while I had another .m file that called the logistic file, should I use ode45?
Mar
6
comment Linear Constant Coefficient Different Equation
@LutzL well now I know what to do but not how to do it. I'm about to just give up on this problem
Mar
6
comment Linear Constant Coefficient Different Equation
@LutzL I'm understand a little better but I'm still not sure how to answer even part $(a)$
Mar
5
comment Linear Constant Coefficient Different Equation
@LutzL so I can make up any constant value? Just pick something like $0$ and $1$ for $N_0$ and $N_1$ respectively?
Feb
19
comment Compound Growth
Okay I see what you're getting at. But in this case what is the difference between $N(t)$ and $N(t+\Delta t)$?
Feb
17
comment Population Growth - Ecology
@satishramanathan nope, that is everything written in the problem. That's why I'm confused as well
Feb
10
comment Pendulum with angular velocity
is there no mathematics behind this?
Feb
7
comment 2nd order non-linear DE
@Chinny84 Thanks for your help!! I really appreciate, I had no idea where to start really. One quick question for (a), is there a way to show what you said mathematically or is it just written?
Feb
6
comment 2nd order non-linear DE
@Chinny84 what exactly is p?
May
3
comment Equation of Motion
so like I said below, I just solve it like a linear equation?
May
3
comment Equation of Motion
okay I'm with you so far in terms of converting the equation to a first order. But I still don't understand what to do from there....wait...do i solve it like a linear equation $\dot{v} + v = x^3-x^5$
May
3
comment Equation of Motion
sorry, I'm really stupid and I'm not seeing much. I actually wrote my equation like $a = x^3 - x^5 - v$, kinda the same ...but then what do I do from here