Plot Definition and 658 Threads

VectorPlot[{D[x[t], t] == x[t] (4 - y[t] - x[t]^2), D[y[t], t] == y[t] (-1 + x[t])}, {x, -10, 10}, {y, -10, 10}, {t, -10, 10}] I'm trying to graph the phase plane of these equations. I get an error, what's wrong with my command?

Anyone knows how to plot a simple probability plot by hand (manually) without using statisical software?

Homework Statement a mass weighig 2 pounds stretches a spring 6 inches. If the mass is pulled down an additional 3 inches and then released, and if there is no damping, detemine the position, u of the mass at any time, t. Plot u verses t. Find the frequency, period and amplitute of the...

Homework Statement an electron starting from rest has an acceleration that increases linearly with time, a= kt. k = 1.5ms^2/s Plot acceleration v.s. time graph for 10 seconds Estimate electron's velocity 5.0s after its motion starts Homework Equations vx =vx0 + axt...

Hi everybody, I did a few measurements at a printer. I have a signal that i put in the printer that gives the printerhead a speed. I have put a sinus on the printerhead, and did this at different frequencies with the same signal strength (20 to 500 Hz, with steps of 15 Hz). I want to...

I want to create a plot, but want the horizontal axis to have increments as multiples of pi eg. {0, pi/2, pi, 3pi/2, ... } Is this at all possible in matlab?

I've two problems: Given are the two sets A = \left \lbrace (x_{0}, x_{1}, x_{2}, x_{3}) \in \mathbb{R}^{4} \mid x_{0}^{2} = \vec{x} \, ^{2}, x_{0} \geq 0 \right \rbrace and B = \left \lbrace (x_{0}, x_{1}, x_{2}, x_{3}) \in \mathbb{R}^{4} \mid (k_{0} - x_{0})^{2} = (\vec{k} -...

Goodmorning everyone, I'm new to this forum! I'm graduing in physics in Italy, and I have this problem. I want use root to plot the Bragg curve for different kinds of particles, with different initial conditions. the problem is, which function have I to plot...

hi , i am unable to draw the graphs of complex valued functions using mathematica, please help me . Ex:koebe function. z/(1-z)^2, z is a complex number

Homework Statement Hi! I'm sorry if this is misplaced, but I didn't know where else to post it. In my thesis I need greek letters to appear in a legend for a figure generated with octave. Now I normally know how to do that. F.e. if I say: legend('\alpha','\kappa') everythging works...

I use c to program. Usually, I write the data to files and plot them with other software like IDL or origin. but I really tired of it, since i need open a file thousands times while debug. Is there any better method to plot the data. which methods do you use?

Hi i need to know a couple of things and i don't know how to get to them...thanks for taking a look over this ... Stem and leaf... 10 |0 9 |2,4,5 8 | 1,2,7,9 7 | 1,1,3 6 | 1,2,8 5 | 1,5 Mean = 77 Mode = 71 Median = what is the mode? I think its 80 but I am not...

My question is that is there any formula for non-physicists like me that can we can use to plot and graph the orbitals of atoms. I know the orbitals arise from solving the Schrodinger equation and solving them but are there already known equations that we can just plug into graphing program that...

Hi there, I am trying to plot the coordinates of Supernovae onto what I think is known as a hammer plot i.e a 2D plot representing the surface of a sphere. I have no idea how to do this, and have been searching the internet to no avail. Can anyone offer any advice ? I only have a basic...

Im trying to build a Matlab code for the distribution of a parameter (such as density or temperature) in 3D, then visualise the distribution also in 3D. At the end, the distribution plot should look like a cone shape where the highest value for the density (or temperature) is at the tip of the...

Hi, I have this problem: I have a main file (main.m) in which is coded a for loop (needed for some data-gathering). De data is stored in a vector. This vector is passes to a 2nd figure (test1.m) which has an axe. Here I want to plot the data in a "real-time" mode. I do this with another...

Hello guys, I'm doing a comparison between Planck's, Rayleigh's and Wien's formula, and I'm plotting the following function in mathematica Plot[{(2 h (v 10^11)^3)/c^2 10^17/(Exp[(h (v 10^11))/(k T)] - 1), ( 2 (v 10^11)^2)/c^2 k T 10^17, (2 h (v 10^11)^3)/ c^2 Exp[-((h (v...

Homework Statement I want to plot a Regular Polygon of many sides on a X-Y graph where I know the number of sides and the radius. I would like a method to calculate the position of the corners of this shape without using compass/ruler. If there was an algorithm that goes all the way around...

hey How can i do that? Can anyone of you help me?greets button MATHEMATICA

Hi I am trying to find a way to create a marginal distribution plot in matlab. I have lots of X-Y values on a scatter plot and need to find the approximate distribution. I have the Statistics Toolbox which is probably needed. I used POLYTOOL which gives me a mean and standard deviation...

Greetings, I am a biochemist/bioinformatician. I have a bunch of clusters, of which I have already calculated all their respective (euclidean) inter distances, from centroid to centroid. I need to plot a graph with these clusters for visual inspection and publication. My problem is how to...

Hi all. I have been searching over the web for some time, kind of frustrated... I would like to plot the contourplot of a function, and I would like the contourplot to be colored. The rule is that...the negative values should be blue in colors and the positive values should be red in colors...

Hi everyone. So, I have a quantity I am computing, say w, a vector. Now w is a function of time t and space x. I have the vectors x and t. At each time step in a loop, I calculate w for that time step. How do I plot w as a 3D plot, as a function of time t and space x, so I can see the...

Homework Statement Figure shows a plot of potential energy U versus position x of a 0.900 kg particle that can travel only along an x axis. (Nonconservative forces are not involved.) Three values are UA = 15 J, UB = 35 J and UC = 45 J. The particle is released at x = 4.5 m with an initial...

Homework Statement How do you draw a bode plot? I have a simple equation: H(S)=s+10 but no school book. Can you help me understand?

Homework Statement How do you draw a bode plot? I have a simple equation: H(S)=s+10 but no school book. Can you teach me?

Graph Help! Plot the graph of the electrical field created by a point charge of 10^-6 C as a funtion of distance to the charge. Plot the graph for the range of the distances from 0.1m to 1m Should I use this equation... E= Q/(4.pi.e)x(d^2) as this is for electric field strength and not...

Hello, I have scavenged the internet and have not been able to figure out how to plot a series of equations in matrix form using maple. for example y = [a,b,c] * x + [4,5,6] would be y1 = a*x + 4 y2 = b*x + 5 y3 = c*x + 6 plot (y1,y2,y3 versus x). I have attached my actual...

NDSolve[{y'[x] == y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}] i attempted this, but it didn't work.

I am trying to plot: u(x,y)=sin(x-t u(x,y)) An implicit solution to a PDE. I have no clue how to do this; I've plotted an equation like this before.

Homework Statement I want to plot the convolution of 2 discrete funtions, for example: rect1 [n] and sin (2*pi*n/9), how can i do that? thanks! :smile: Homework Equations The Attempt at a Solution

Hey, I am making some plots in a loop and I want to save the different plots in different files. I am new to Matlab so I don't know what to do, I tried the command print('-dpdf','plot n = %s'n) ,but that was an 'Unexpected MATLAB expression.'

I was wondering if there were reasonable ways of producing a graph of a bunch of points in C. Being able to connect them with lines would be even better. I'm on Mac OS X and I use XCode if it matters. So far, I'm not too familiar with <graphics.h>. I wouldn't mind creating my own graphics...

Hi How can i compute(or obtain from mathmatical tables) and plot a several energy eigenvalues of a particle in an infinity deep ,spherically and symmetric square well?

i want to plot these equations in 3d Eq 1= 5x^2 - 2y^2 + 4x+ 4y -4 +2xy Eq 2 =x^2 +3x +2y +xy +5 eq 3 = -7x2 +3x -6y +5xy +2 i tried plot3 with 3 matix of x,y,z but i am not satisfied with the result. please if anyone know how to plot these equations.let me know thanks in advance

Hi there. I am trying to plot the fabric of spacetime caused by an object using the schwarzchild solution. The idea is to replace one of the basis of space with time. I have computed R_{\mu\nu}, R and T_{\mu\nu} but I'm stuck here. How do I get to the equation of the surface from here? Any help...

A linear plot of speed versus elapsed time has a slope of 5.0 m/s2 and a vertical intercept of 5.0 m/s. (a) What is the change in speed in the time interval between 4.0 seconds and 6.0 seconds? The answer is 10, which completely makes sense to me. But... (b) What is the speed when the...

General question regarding mathematica. I am trying to make a plot of A Sin(\omega t - \pi / 2) but it seems that mathematica cannot plot this graph without having A and omega defined. Is there a way to have mathematica plot this given the variable A and frequency omega? Basically, instead...

Hello, I am trying to understand how this graph http://en.wikipedia.org/wiki/File:Bandwidth_2.svg gets plotted. My goal is to write a small program that takes the center frequency/bandwidth and a (cut/boost) gain values and plot the curve. I initially assumed, all I needed to find was an...

Well I'm supposed to draw Thomson cross section in polar plot by MATLAB software. Have I done it right? I mean does this figure that I got seem to be in polar plot or not? t = 0:.01:2*pi; r = 2.8179e-13 x = t,0.5*power(r,2)*(1+power(cos(t),2)) polar(t,x) Thanks

I would like to calculate the dislocation from the WH plot. I have HRXRD mesurement results with (004),(111) and (115) for omega and omega-2theta. Please someone guide me how to do?

Has my lecturer lost the plot!? He keeps giving us PDEs to solve where the initial conditions specify x at a POINT rather than along a curve e.g. solve yzx+xzy+z=y given z=2 @ (3,1) should he not be saying z@ x = ... OR z @ y = ... thanks

Well Fidel Castro, for one, is surprised that Obama is still alive: http://news.yahoo.com/s/ap/20081027/ap_on_el_pr/skinhead_plot

I want to be able to display continually updated numbers on a plain figure environment. For example, a cheap way to do this is: figure(1) for j = 1:10 title([ 'Hello'; num2str(j) ]) end This prints out a two-liner ('Hello' and a number) in the title portion of the figure. I...

Can anyone please explain to me what a y vs. t and a v vs. t plot would look like for an object projected vertically upward with an initial velocity of 34.3 m/s? Would the y vs. t plot look like a parabola? Would the v vs. t plot look like a diagonal line starting at 34.3 m/s and ending at...

I was given this homework today and without much explanation from the teacher , I can't find anything similar in my book, 1.- [[ x]] = [[y]] find outside domain/range , argue inclusion or exclusion 2.- compare and contrast (1) y=[[2x]] (2) y=2[[x]] (3) y= [[x/2]] 3.- state domain and...

Homework Statement what is the plot of 2log(y)=log2+log(x+1) Homework Equations is it the inverse of this Y^2=x+2 The Attempt at a Solution

I am new to Mathematica and I am trying to make models of white dwarf spherical harmonics similar to the ones on this site: http://whitedwarf.org/education/vis/index.html. So far the closest thing I have is this: SphericalPlot3D[3, {\[Theta], 0, \[Pi]}, {\[Phi], 0, 2 \[Pi]}, Mesh -> None...

Does anyone know how to plot the electron standing wave around a nucleus in Cartesian coordinates? I have tried adding a sine/cosine function to the circle equation but the image does not look correct and I also don’t know how to increase the wave count when n > 1.

Hey guys. I need to know how to draw a Phase Bode plot of a Second order system. I understand and can draw the Gain(Magnitude) Bode plot, but I can't seem to get the grip of the Phase one. As far as I know there is an asymptote at 0^{o} at low frequencies and an asymptote at 180^{o} at...