Plot Definition and 658 Threads

\sum_{k=0}^{∞} (t-2k) [u(t-2k)-u(t-2(k+1))] = f(t) where u is the step function and the graph of this is supposed to be 45 degree lines repeating to infinity. Sort of like / / / / / / / / / ad infinitum. I took this equation out of this lecture note on page 10. Fig 5.4 is supposedly the graph...

Homework Statement I am trying to make a plot of the magnification factor of an underdamped vibrating system versus the frequency ratio using MATLAB. However, my MATLAB skills are very basic and I keep getting an error message. Basically I am trying to plot: MF=1/√((1-r^2)^2+(2ζr)^2)...

Does anybody (Jester?) know how to get WolframAlpha to plot slope fields to, say, $y'=f(x,y)$? For example, $y'=x^{2}$, and I want the slope field plotted up with $x\in[-2,2]$ and $y\in[-2,2]$. What would the actual command be? Thanks in advance!

I have a question I'm wondering in bode plot we write the horizontal axis w rad/sec what does this mean? is it normal scale 0.1 0.2 0.3 ... etc with equal distances?? it's clear not because it's drwan on semilog paper if it's the horizontal log w why then we write 0.1 ,0.2 ,,1 ...

Hello, good afternoon. I wonder how do I create a chart like this picture in TI89 Titanium calculator. Is there any application that creates this chart and let me save for the calculator? thank you http://img89.imageshack.us/img89/1703/52445184t.jpg

Hi everyone, I'm real confused and stucked about a point in applying Nyquist stability criterion... now i'll explain why. I know that it's needed to know how many times I'm wrapping the nyquist critical point (-1;0) with my plot, and I'm enough good to draw by hand a nyquist plot, but the...

How to make a surface plot involving an infinite series in Matlab Solving Laplace's equation for electric potential for a 2D surface yields: V(x,y) = 4 Vo/pi * Ʃ (n=1,3,5,...) (1/n e^(-npi*x/a) sin(n*pi*y/a) ,where a is and Vo are constants ...it's convoluted, but basically, I need to...

Is it possible to construct Nyquist plot from polar plot (ω varies from ∞ to 0) ?

I've read the article in wikipedia but I can't understand it. Can someone point me to a good explanation of what a Q-Q plot shows and how to make one, or explain to me please?

Given an equation like 2/((jw)^2 +54jw +44), how would you find the critical frequency? I am getting a umaginary number and I am sure this is not true, please help!

Homework Statement I've been asked to estimate ωn and ζ from the magnitude and phase plot of an atomic force microscope. The magnitude and phase plot is attached. Does anyone know how to solve for these values?

Homework Statement The copy of the question is in the image attached. I don't have a graphing calculator, and so am not sure how to determine the equation of the exponential function. Homework Equations y = a^x The Attempt at a Solution I made a scatter plot off of an online...

I'm trying to plot the vorticity field for lid-driven cavity flow. Because I'm looking at 2D flow, the vorticity is plotted as a scalar field The flow field is clockwise, and I would expect the majority of the resulting vorticity field to be negative (right hand rule). However, it seems as...

Is there a formal way to measure the error between some arbitrary points and a non-linear curve in order to minimize it?

Homework Statement Show all the steps required to modify the equation so that the plot yields a straight line. N/N0=e\ -ux This equation demonstrates the fraction radiation absorbed by a material, where "N0" is the number of incident photons from the radioactive source without any absorbed...

I am stuck on the following task; Create a 2D Parametric Plot showing a spiral path. The parametric equations for a logarithmic spiral are x=k^u Cosine(u), y=k^u Sine(u), where k is a constant, and u is the plot parameter. What does the value of k determine? I have been typing in the...

I model arterial baroreflex data that I have collected in humans using the Kent equation which is: y=p1/(1+exp((x-p3)*p2))+p4; where Y=heart rate, X= estimated carotid sinus pressure, p1=range of Y, p2=slope coeff, p3=centerpoint on X, p4 = minimum Y. I use Sigma Plot to do a best fit line...

Homework Statement Given this function in an open loop control system http://img255.imageshack.us/img255/3686/700qa.jpg Draw a bode plot of the transfer function: The upper graph will present the lines for each of the amplification factors for each of the system components, the lower...

Homework Statement I want to Plot a Orbit using only the Orbital Elements. The orbit will be two dimensional, so I think some elements will be discarded. Homework Equations The Attempt at a Solution

Hi everyone, I'm working on a project where I need to produce a 3D plot for matrix using Matlab. The plot must comprise of both alpha and beta in 3D. Alpha, A is a 320 x 333 x 4 matrix, where each individual layer (i.e. A(320,333,i) for i = 1:4) represents one image's angles. The beta matrix...

Homework Statement Hello. My problem is that I need to learn how to use computer software this semester. My teacher said, go and figure out how to use any computer software you like to make graphs. I have Mathematica but I am not proficient in using it, could somebody please help me with...

Hi, I have x and y vectors, x=[ 90868 68151 45434 34076 27261 13631 6816 3408 2273 1948 1705 1137 853 683 569 455 342 274 228 190]; y=[ 3680 3723 3800 3866 3920 4103 4250 4320 4340 4344 4350 4364 4373 4379 4384 4393 4398 4402 4405 4407]; I need to plot semilogx in MATLAB and add trendline and...

I am going through a past paper for an upcoming exam and I want to check that I am approaching this question correctly. H(s) = 1/(s2 + 8485.28s + 36x10-6) Calculate and plot frequency response for 0 rad/s, 500 rad/s, 1000 rad/s and 10000 rad/s. I am under the impression that the 's'...

I am slightly confused by the labelling of the vertical axis on parton distribution function plots. Take the one here: http://www.hep.phy.cam.ac.uk/~wjs/partons2008nlo.jpg as an example. The vertical axis is labelled as xf(x, Q^2), where f is the probability density of finding a...

Good Day Everybody, Please assist me on these problems 1. I wish to put six plots on the same plot using matlab. The details of each plot are stated below PLOT 1 x axis range 0:1 y axis range 0:1 PLOT 2 x axis range 0:1 y axis range 0:1 PLOT 3 x axis range 0:1 y axis range...

Homework Statement http://www.wifstrand.se/Albert/stuff/p13.3-6.png Homework Equations From circuit analysis I've found the network function to be H(ω) = -(10^(-4) +jωC1)/(1/R2 + jωC2) (could be wrong) The Attempt at a Solution I don't know how to determine the network...

Homework Statement 7/2x >= -1/4 then put it on a number plot. Homework Equations The Attempt at a Solution 7x/7 >= -2/4 = -1/2 -1/2 *7/1 = -7/2 x>= -7/2 and I'm not sure if I'm even correct for that answer, and I have to put it on a number plot.

Hello, You can use a Q-Q plot to visually test if 2 continuous variables are from the same distribution and you get a straight line. Is there a way to visually test if 2 discrete variables are from the same distribution? Also is there a way to test it mathematically? Thanks

What is the load line equation for I-V Characteristic plots? Why is load line slope negative? According to Ohm's Law: i = V/R; so as voltage increases current increases then slope should be positive, right?

Any python/matplotlib experts out there?? This one has been driving me crazy all day. I have three vectors, azimuth, frequency and power, which I would like to histogram and plot on a polar axis. I can plot a scatter plot this way no problem but the histogram gets messed up somehow. An example...

Hey guys. I was wondering if anyone could give me some hints or help me understand well how to get transfer functions off bode plots. Here is an example I need to solve: http://i1226.photobucket.com/albums/ee410/jean28x/bodeplotcalc.jpg

This is the Bode plot of a Broadband Bandreject Op Amp amplifier. The exercise says this: I know that in order to get both cutoff frequencies I need to subtract 3 dB from the plot, but how do I get the gain? I would think that the gain is 3 dB because it is also the distance between the top of...

If you have the impact force on the y-axis (in Newtons) and the time on the x-axis (in milliseconds), can you get the coefficient of restitution from just this? The plot is for the force of impact exchanged between two balls as a function of time. I know the coefficient of restitution is the...

Hi all, I am wondering how I plot the steady state temperature distribution of a square flat sheet in maple. I solved the initial partial differential equation I was given and ended up with a function generalized as T(x,y) =(constants)*sum(stuff). Which is a Fourier series representing...

\begin{alignat*}{3} u_{tt} & = & c^2u_{xx}\\ u(0,t) & = & 0\\ u_x(L,t) & = & 0\\ u(x,0) & = & \frac{x}{L}\\ u_t(x,0) & = & 0 \end{alignat*} Let's start with $u_t(x,0) = 0$. Then $$ u_t(x,0) = \sum_{n = 1}^{\infty}B_n\frac{\pi c}{L}\left(n + \frac{1}{2}\right)\sin\left[\frac{\pi x}{L}\left(n +...

$$ \vec{E} = -E\cos\theta\left(1 + \frac{2a^3}{r^3}\right)\hat{e_r} + E\sin\theta\left(1 - \frac{a^3}{r^3}\right)\hat{e_{\theta}}. $$ How can I plot this in Mathematica?

According to me Transfer function will be G(s)= (s2+2ζωn+ωn2)/((s+p1)(s+p2)) I assume from the given plot that ωn < p1 and ωn < p2 Then the bode plot will be as per me like following :From the Bode plot we can see for higher freq magnitude is amplified . So it will be High pass Filter. That's...

Howdy folks, I have been given the opportunity to do some extra credit for my mechanics class. As an assignment, my prof would like to see a 3D trajectory plotted via a program (like Python). My basic assignment is to plot the trajectory of a soccer ball after it has been kicked. I don't...

Hi, I was wondering - In the plots that we see of magnetic lines of force (like this one) what exactly are they plotting against what? Meaning is it Bx vs x vs y, or is it Bx vs By vs Bz?

1. Problem is given in the following link: http://s11.postimage.org/mrns0fu37/Problem.jpg Homework Equations In my opinion open loop transfer function is given stable. So poles on RHS for open loop t.f. will be 0. But nyquist plot rotates (0,0) point by -360 . So thare will be...

Hi everyone, my code is a little rusty and a work in progress but I was wondering how I would go about producing arrays for the calculations performed in the while loop for the analyses so they can be plotted. I have the following parameter input; G0 = 50; v = 0.25...

First create the function file and name it whatever you would like. I prefer phase-portrait. % Phase Plot Program % To use this function, do the following: % >> phase_portrait(x1, x2, y1, y2, tfinal, 'F', N); for example, % >> phase_portrait(-5, 5, -5, 5, 10, 'F', 5)function [] =...

You can find problems with downloadable notebooks now http://www.mathhelpboards.com/f49/engineering-analysis-notes-2882/. If one boundary is insulated and the other is subjected to and held at a temperature of unity, we wish to determine the solution for the transient heating of the slab. The...

i don't know how i can use MATLAB to plot anti periodic fun .. the origin site give this code for triangular fun: fs = 10000; t = -1:1/fs:1; x1 = tripuls(t,20e-3); plot(t,x1), xlabel('Time (sec)');ylabel('Amplitude'); title('Triangular Aperiodic Pulse') but when i use this for sine...

Using this series approximation, plot the temperature profiles on the same set of axes for a range of time steps in the dimensionless time interval $t\in [0,4]$ in order to visualize the process. $$ \begin{alignat*}{3} T(x,t) & = & 1.7624\cos(0.86x)e^{-0.86^2t} - 0.1638\cos(3.426x)e^{-3.426^2t}...

Can anyone tell me how to find the gain bandwidth product from bode plot of a unity gain circuit for the attached bode plot? I hv attached the circuit and bode plot ...

Consider the problem of a particle sliding inwards with a constant speed c and starting at radius R=pc/Ω, on a platform rotating with a constant angular velocity Ω. Give a plot of the trajectory of the particle from r=R to r=0, for p=0.5, 1, 2, 6. I'm a little confused on how to do this...

I'm stuck on a really simple problem because I haven't done MATLAB in a while. I have transfer functions for nth order lowpass Butterworth Filters: H(jw) = 1/(s + w_c)^n I want to plot the 1st to 5th order filters. How do I input H(jw) into matlab? The tf(num, den) is not efficient in that...

Homework Statement I need to plot an electric field in some range around base station, for example in range of 200m. EIRP=57,5dBm G=1 for the first example N=4 Homework Equations E=[2*sqrt(30*N*P*G)]/r P=10exp[(EIRP-30)/10] EIRP=57,5dBm G=1 for the first example N=4 The...

How can I plot this probability density function using Wolfram Mathematica Keeping the constants the same. ψ*ψ= A^2 (x^2)exp(-2a(mx^2/h)) ; where m,a,A,and h are constants and I want the graph in terms of them. I tried: Plot[A^2 *(x^2)*exp(-2a(mx^2/h)),{x,-1000,1000}]